/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 false -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-eb0fd7c [2020-09-21 10:28:00,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:28:00,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:28:00,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:28:00,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:28:00,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:28:00,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:28:00,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:28:00,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:28:00,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:28:00,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:28:00,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:28:00,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:28:00,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:28:00,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:28:00,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:28:00,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:28:00,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:28:00,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:28:00,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:28:00,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:28:00,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:28:00,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:28:00,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:28:00,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:28:00,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:28:00,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:28:00,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:28:00,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:28:00,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:28:00,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:28:00,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:28:00,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:28:00,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:28:00,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:28:00,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:28:00,408 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 [2020-09-21 10:28:00,468 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:28:00,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:28:00,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:28:00,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:28:00,472 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:28:00,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:28:00,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:28:00,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:28:00,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:28:00,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:28:00,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:28:00,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:28:00,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:28:00,475 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:28:00,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:28:00,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:28:00,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:28:00,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:28:00,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:28:00,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:28:00,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:28:00,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:00,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:28:00,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:28:00,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:28:00,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:28:00,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:28:00,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:28:00,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:28:00,479 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 -> false [2020-09-21 10:28:01,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:28:01,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:28:01,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:28:01,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:28:01,054 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:28:01,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-21 10:28:01,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d7aa3031/540442f96b0643f7ac19db9158d23e48/FLAG6d860fcde [2020-09-21 10:28:01,675 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:28:01,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-21 10:28:01,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d7aa3031/540442f96b0643f7ac19db9158d23e48/FLAG6d860fcde [2020-09-21 10:28:02,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d7aa3031/540442f96b0643f7ac19db9158d23e48 [2020-09-21 10:28:02,015 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:28:02,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:28:02,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:02,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:28:02,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:28:02,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5352a789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02, skipping insertion in model container [2020-09-21 10:28:02,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:28:02,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:28:02,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:02,345 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:28:02,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:02,493 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:28:02,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02 WrapperNode [2020-09-21 10:28:02,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:02,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:28:02,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:28:02,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:28:02,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (1/1) ... [2020-09-21 10:28:02,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:28:02,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:28:02,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:28:02,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:28:02,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (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 [2020-09-21 10:28:02,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:28:02,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:28:02,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:28:02,641 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-09-21 10:28:02,641 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-09-21 10:28:02,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:28:02,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:28:02,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:28:02,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:28:02,642 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-09-21 10:28:02,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:28:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-09-21 10:28:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:28:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:28:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:28:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:28:02,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:28:02,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:28:03,113 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:28:03,113 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-09-21 10:28:03,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:03 BoogieIcfgContainer [2020-09-21 10:28:03,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:28:03,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:28:03,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:28:03,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:28:03,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:28:02" (1/3) ... [2020-09-21 10:28:03,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1fb34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:03, skipping insertion in model container [2020-09-21 10:28:03,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:02" (2/3) ... [2020-09-21 10:28:03,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1fb34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:03, skipping insertion in model container [2020-09-21 10:28:03,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:03" (3/3) ... [2020-09-21 10:28:03,129 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-09-21 10:28:03,141 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:28:03,152 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:28:03,174 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:28:03,204 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:28:03,204 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:28:03,204 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:28:03,204 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:28:03,204 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:28:03,205 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:28:03,205 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:28:03,205 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:28:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-09-21 10:28:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:28:03,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:03,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:03,237 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-09-21 10:28:03,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:03,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608057869] [2020-09-21 10:28:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:03,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:03,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608057869] [2020-09-21 10:28:03,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:03,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:28:03,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633790419] [2020-09-21 10:28:03,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:28:03,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:03,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:28:03,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:28:03,541 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-09-21 10:28:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:03,858 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-09-21 10:28:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:28:03,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-21 10:28:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:03,874 INFO L225 Difference]: With dead ends: 150 [2020-09-21 10:28:03,875 INFO L226 Difference]: Without dead ends: 89 [2020-09-21 10:28:03,880 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 [2020-09-21 10:28:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-21 10:28:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-09-21 10:28:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 10:28:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-09-21 10:28:03,945 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-09-21 10:28:03,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:03,946 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-09-21 10:28:03,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:28:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-09-21 10:28:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:28:03,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:03,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:03,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:28:03,949 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:03,949 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-09-21 10:28:03,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:03,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48993967] [2020-09-21 10:28:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:04,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:04,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48993967] [2020-09-21 10:28:04,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:04,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:28:04,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371404856] [2020-09-21 10:28:04,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:04,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:04,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:04,052 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-09-21 10:28:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:04,374 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-09-21 10:28:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:28:04,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-21 10:28:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:04,377 INFO L225 Difference]: With dead ends: 170 [2020-09-21 10:28:04,377 INFO L226 Difference]: Without dead ends: 122 [2020-09-21 10:28:04,379 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 [2020-09-21 10:28:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-21 10:28:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-09-21 10:28:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-21 10:28:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-09-21 10:28:04,392 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-09-21 10:28:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:04,393 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-09-21 10:28:04,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-09-21 10:28:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:28:04,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:04,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:04,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:28:04,395 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-09-21 10:28:04,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:04,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122764532] [2020-09-21 10:28:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:04,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:04,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122764532] [2020-09-21 10:28:04,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:04,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:28:04,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059995606] [2020-09-21 10:28:04,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:28:04,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:28:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:04,509 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-09-21 10:28:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:04,856 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-09-21 10:28:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:28:04,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-21 10:28:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:04,860 INFO L225 Difference]: With dead ends: 203 [2020-09-21 10:28:04,860 INFO L226 Difference]: Without dead ends: 155 [2020-09-21 10:28:04,862 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 [2020-09-21 10:28:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-21 10:28:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-09-21 10:28:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 10:28:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-09-21 10:28:04,875 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-09-21 10:28:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:04,875 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-09-21 10:28:04,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:28:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-09-21 10:28:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:28:04,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:04,877 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:04,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:28:04,877 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-09-21 10:28:04,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:04,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385056587] [2020-09-21 10:28:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:04,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:04,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385056587] [2020-09-21 10:28:04,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:04,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:28:04,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610842704] [2020-09-21 10:28:04,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:28:04,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:04,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:28:04,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:04,958 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-09-21 10:28:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:05,368 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-09-21 10:28:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:28:05,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-21 10:28:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:05,375 INFO L225 Difference]: With dead ends: 236 [2020-09-21 10:28:05,376 INFO L226 Difference]: Without dead ends: 188 [2020-09-21 10:28:05,377 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 [2020-09-21 10:28:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-21 10:28:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-09-21 10:28:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 10:28:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-09-21 10:28:05,404 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-09-21 10:28:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:05,404 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-09-21 10:28:05,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:28:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-09-21 10:28:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:28:05,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:05,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:05,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:28:05,406 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-09-21 10:28:05,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:05,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706937528] [2020-09-21 10:28:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:05,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 10:28:05,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706937528] [2020-09-21 10:28:05,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:05,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:05,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138143983] [2020-09-21 10:28:05,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:05,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:05,536 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-09-21 10:28:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:05,689 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-09-21 10:28:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:28:05,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-09-21 10:28:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:05,691 INFO L225 Difference]: With dead ends: 116 [2020-09-21 10:28:05,691 INFO L226 Difference]: Without dead ends: 67 [2020-09-21 10:28:05,692 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 [2020-09-21 10:28:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-21 10:28:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-09-21 10:28:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-21 10:28:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-09-21 10:28:05,707 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-09-21 10:28:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:05,707 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-09-21 10:28:05,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-09-21 10:28:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 10:28:05,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:05,710 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] [2020-09-21 10:28:05,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:28:05,710 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:05,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-09-21 10:28:05,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:05,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942686369] [2020-09-21 10:28:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:05,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:05,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:28:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:05,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:28:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:05,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942686369] [2020-09-21 10:28:05,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:05,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:28:05,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485226864] [2020-09-21 10:28:05,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:28:05,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:05,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:28:05,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:05,835 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-09-21 10:28:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:06,246 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-09-21 10:28:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:28:06,253 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-09-21 10:28:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:06,255 INFO L225 Difference]: With dead ends: 223 [2020-09-21 10:28:06,255 INFO L226 Difference]: Without dead ends: 173 [2020-09-21 10:28:06,256 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 [2020-09-21 10:28:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-21 10:28:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-09-21 10:28:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 10:28:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-09-21 10:28:06,269 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-09-21 10:28:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:06,270 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-09-21 10:28:06,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:28:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-09-21 10:28:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 10:28:06,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:06,275 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] [2020-09-21 10:28:06,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:28:06,275 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:06,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-09-21 10:28:06,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:06,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887119598] [2020-09-21 10:28:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:28:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 10:28:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:06,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887119598] [2020-09-21 10:28:06,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:06,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:28:06,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888669922] [2020-09-21 10:28:06,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:28:06,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:28:06,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:06,459 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-09-21 10:28:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:07,001 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-09-21 10:28:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:28:07,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-09-21 10:28:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:07,007 INFO L225 Difference]: With dead ends: 246 [2020-09-21 10:28:07,009 INFO L226 Difference]: Without dead ends: 196 [2020-09-21 10:28:07,010 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 [2020-09-21 10:28:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-21 10:28:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-09-21 10:28:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 10:28:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-09-21 10:28:07,035 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-09-21 10:28:07,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:07,036 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-09-21 10:28:07,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:28:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-09-21 10:28:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 10:28:07,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:07,039 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] [2020-09-21 10:28:07,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:28:07,039 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:07,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-09-21 10:28:07,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:07,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752897269] [2020-09-21 10:28:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 10:28:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:28:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:07,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752897269] [2020-09-21 10:28:07,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:07,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:28:07,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920006154] [2020-09-21 10:28:07,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:28:07,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:28:07,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:07,187 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-09-21 10:28:07,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:07,780 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-09-21 10:28:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:28:07,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-09-21 10:28:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:07,784 INFO L225 Difference]: With dead ends: 269 [2020-09-21 10:28:07,784 INFO L226 Difference]: Without dead ends: 219 [2020-09-21 10:28:07,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:28:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-21 10:28:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-09-21 10:28:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-21 10:28:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-09-21 10:28:07,797 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-09-21 10:28:07,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:07,797 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-09-21 10:28:07,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:28:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-09-21 10:28:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 10:28:07,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:07,799 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] [2020-09-21 10:28:07,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:28:07,800 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:07,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-09-21 10:28:07,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:07,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647816456] [2020-09-21 10:28:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:28:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:28:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:07,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647816456] [2020-09-21 10:28:07,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:07,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:28:07,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149985174] [2020-09-21 10:28:07,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:28:07,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:07,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:28:07,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:28:07,976 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-09-21 10:28:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:08,593 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-09-21 10:28:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:28:08,595 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-09-21 10:28:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:08,598 INFO L225 Difference]: With dead ends: 292 [2020-09-21 10:28:08,598 INFO L226 Difference]: Without dead ends: 242 [2020-09-21 10:28:08,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:28:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-21 10:28:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-09-21 10:28:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 10:28:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-09-21 10:28:08,612 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-09-21 10:28:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:08,612 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-09-21 10:28:08,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:28:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-09-21 10:28:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 10:28:08,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:08,614 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] [2020-09-21 10:28:08,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:28:08,615 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:08,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-09-21 10:28:08,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:08,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223156215] [2020-09-21 10:28:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:28:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:28:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:08,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223156215] [2020-09-21 10:28:08,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:08,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:28:08,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613121269] [2020-09-21 10:28:08,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:28:08,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:08,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:28:08,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:28:08,793 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-09-21 10:28:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:09,467 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-09-21 10:28:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:28:09,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-21 10:28:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:09,470 INFO L225 Difference]: With dead ends: 315 [2020-09-21 10:28:09,471 INFO L226 Difference]: Without dead ends: 265 [2020-09-21 10:28:09,472 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 [2020-09-21 10:28:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-21 10:28:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-09-21 10:28:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-21 10:28:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-09-21 10:28:09,482 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-09-21 10:28:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:09,483 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-09-21 10:28:09,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:28:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-09-21 10:28:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:28:09,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:09,484 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] [2020-09-21 10:28:09,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:28:09,485 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:09,485 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-09-21 10:28:09,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:09,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635004221] [2020-09-21 10:28:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:09,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:09,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 10:28:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:09,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:28:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:09,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635004221] [2020-09-21 10:28:09,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:09,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:28:09,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118144616] [2020-09-21 10:28:09,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:28:09,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:28:09,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:28:09,658 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-09-21 10:28:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:10,327 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-09-21 10:28:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:28:10,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-09-21 10:28:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:10,331 INFO L225 Difference]: With dead ends: 338 [2020-09-21 10:28:10,331 INFO L226 Difference]: Without dead ends: 288 [2020-09-21 10:28:10,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:28:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-21 10:28:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-09-21 10:28:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-21 10:28:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-09-21 10:28:10,341 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-09-21 10:28:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:10,341 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-09-21 10:28:10,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:28:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-09-21 10:28:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 10:28:10,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:10,343 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] [2020-09-21 10:28:10,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:28:10,343 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:10,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-09-21 10:28:10,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:10,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450354565] [2020-09-21 10:28:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:10,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:10,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:28:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:10,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:28:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:10,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450354565] [2020-09-21 10:28:10,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:10,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:28:10,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333094109] [2020-09-21 10:28:10,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:28:10,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:28:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:28:10,582 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-09-21 10:28:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:11,443 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-09-21 10:28:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:28:11,444 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-09-21 10:28:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:11,447 INFO L225 Difference]: With dead ends: 361 [2020-09-21 10:28:11,447 INFO L226 Difference]: Without dead ends: 311 [2020-09-21 10:28:11,448 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 [2020-09-21 10:28:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-09-21 10:28:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-09-21 10:28:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 10:28:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-09-21 10:28:11,457 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-09-21 10:28:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:11,458 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-09-21 10:28:11,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:28:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-09-21 10:28:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 10:28:11,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:11,459 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] [2020-09-21 10:28:11,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:28:11,460 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:11,460 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-09-21 10:28:11,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:11,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430600209] [2020-09-21 10:28:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:11,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:11,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:28:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:11,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:28:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:11,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430600209] [2020-09-21 10:28:11,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:11,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:28:11,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759285929] [2020-09-21 10:28:11,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:28:11,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:11,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:28:11,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:28:11,712 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-09-21 10:28:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:12,611 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-09-21 10:28:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:28:12,612 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-09-21 10:28:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:12,616 INFO L225 Difference]: With dead ends: 384 [2020-09-21 10:28:12,616 INFO L226 Difference]: Without dead ends: 334 [2020-09-21 10:28:12,617 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 [2020-09-21 10:28:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-09-21 10:28:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-09-21 10:28:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 10:28:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-09-21 10:28:12,634 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-09-21 10:28:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:12,634 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-09-21 10:28:12,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:28:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-09-21 10:28:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:28:12,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:12,637 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] [2020-09-21 10:28:12,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:28:12,638 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:12,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-09-21 10:28:12,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:12,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455176755] [2020-09-21 10:28:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:12,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:12,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:28:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:12,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:28:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:12,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455176755] [2020-09-21 10:28:12,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:12,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:28:12,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329227999] [2020-09-21 10:28:12,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:28:12,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:12,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:28:12,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:28:12,955 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-09-21 10:28:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:13,810 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-09-21 10:28:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:28:13,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-09-21 10:28:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:13,814 INFO L225 Difference]: With dead ends: 407 [2020-09-21 10:28:13,814 INFO L226 Difference]: Without dead ends: 357 [2020-09-21 10:28:13,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:28:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-09-21 10:28:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-09-21 10:28:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 10:28:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-09-21 10:28:13,826 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-09-21 10:28:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:13,826 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-09-21 10:28:13,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:28:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-09-21 10:28:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 10:28:13,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:13,828 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] [2020-09-21 10:28:13,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:28:13,828 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-09-21 10:28:13,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:13,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931009111] [2020-09-21 10:28:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:14,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:14,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:28:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:14,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:28:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:14,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931009111] [2020-09-21 10:28:14,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:14,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 10:28:14,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491729002] [2020-09-21 10:28:14,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 10:28:14,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 10:28:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:28:14,055 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-09-21 10:28:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:15,009 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-09-21 10:28:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:28:15,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-09-21 10:28:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:15,012 INFO L225 Difference]: With dead ends: 430 [2020-09-21 10:28:15,012 INFO L226 Difference]: Without dead ends: 380 [2020-09-21 10:28:15,013 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 [2020-09-21 10:28:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-09-21 10:28:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-09-21 10:28:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-21 10:28:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-09-21 10:28:15,024 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-09-21 10:28:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:15,024 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-09-21 10:28:15,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 10:28:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-09-21 10:28:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:28:15,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:15,025 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] [2020-09-21 10:28:15,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:28:15,026 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:15,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-09-21 10:28:15,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:15,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272405761] [2020-09-21 10:28:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:15,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:28:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:15,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:28:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:15,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272405761] [2020-09-21 10:28:15,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:15,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:28:15,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901499373] [2020-09-21 10:28:15,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:28:15,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:28:15,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:28:15,306 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-09-21 10:28:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:16,269 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-09-21 10:28:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 10:28:16,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-09-21 10:28:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:16,273 INFO L225 Difference]: With dead ends: 453 [2020-09-21 10:28:16,273 INFO L226 Difference]: Without dead ends: 403 [2020-09-21 10:28:16,274 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 [2020-09-21 10:28:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-09-21 10:28:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-09-21 10:28:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-21 10:28:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-09-21 10:28:16,286 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-09-21 10:28:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:16,288 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-09-21 10:28:16,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 10:28:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-09-21 10:28:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 10:28:16,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:16,289 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] [2020-09-21 10:28:16,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:28:16,289 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-09-21 10:28:16,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:16,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674804712] [2020-09-21 10:28:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:16,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:16,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:28:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:28:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:16,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674804712] [2020-09-21 10:28:16,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:16,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 10:28:16,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603402916] [2020-09-21 10:28:16,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 10:28:16,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 10:28:16,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:28:16,584 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-09-21 10:28:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:17,513 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-09-21 10:28:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:28:17,514 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-09-21 10:28:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:17,517 INFO L225 Difference]: With dead ends: 476 [2020-09-21 10:28:17,517 INFO L226 Difference]: Without dead ends: 426 [2020-09-21 10:28:17,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:28:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-09-21 10:28:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-09-21 10:28:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-21 10:28:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-09-21 10:28:17,528 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-09-21 10:28:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:17,529 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-09-21 10:28:17,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 10:28:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-09-21 10:28:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:28:17,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:17,530 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] [2020-09-21 10:28:17,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:28:17,530 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-09-21 10:28:17,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:17,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990302010] [2020-09-21 10:28:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:17,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:17,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:28:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:28:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:17,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990302010] [2020-09-21 10:28:17,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:17,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 10:28:17,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733180957] [2020-09-21 10:28:17,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 10:28:17,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:17,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 10:28:17,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:28:17,843 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-09-21 10:28:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:19,147 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-09-21 10:28:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 10:28:19,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-09-21 10:28:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:19,154 INFO L225 Difference]: With dead ends: 499 [2020-09-21 10:28:19,155 INFO L226 Difference]: Without dead ends: 449 [2020-09-21 10:28:19,156 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 [2020-09-21 10:28:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-09-21 10:28:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-09-21 10:28:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 10:28:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-09-21 10:28:19,166 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-09-21 10:28:19,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:19,166 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-09-21 10:28:19,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 10:28:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-09-21 10:28:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 10:28:19,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:19,167 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] [2020-09-21 10:28:19,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:28:19,168 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:19,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:19,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-09-21 10:28:19,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:19,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32292665] [2020-09-21 10:28:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:19,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:19,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:28:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:19,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:28:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:19,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32292665] [2020-09-21 10:28:19,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:19,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:28:19,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837561104] [2020-09-21 10:28:19,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:28:19,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:19,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:28:19,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:28:19,521 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-09-21 10:28:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:20,926 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-09-21 10:28:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:28:20,926 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-09-21 10:28:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:20,930 INFO L225 Difference]: With dead ends: 522 [2020-09-21 10:28:20,930 INFO L226 Difference]: Without dead ends: 472 [2020-09-21 10:28:20,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:28:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-09-21 10:28:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-09-21 10:28:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 10:28:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-09-21 10:28:20,945 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-09-21 10:28:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:20,946 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-09-21 10:28:20,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:28:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-09-21 10:28:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 10:28:20,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:20,947 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] [2020-09-21 10:28:20,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:28:20,948 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-09-21 10:28:20,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:20,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020197314] [2020-09-21 10:28:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:21,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:21,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:28:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:21,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:28:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:21,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020197314] [2020-09-21 10:28:21,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:21,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 10:28:21,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990771512] [2020-09-21 10:28:21,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 10:28:21,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:21,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 10:28:21,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:28:21,288 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-09-21 10:28:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:22,936 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-09-21 10:28:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 10:28:22,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-09-21 10:28:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:22,941 INFO L225 Difference]: With dead ends: 545 [2020-09-21 10:28:22,941 INFO L226 Difference]: Without dead ends: 495 [2020-09-21 10:28:22,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:28:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-09-21 10:28:22,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-09-21 10:28:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-21 10:28:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-09-21 10:28:22,957 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-09-21 10:28:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:22,957 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-09-21 10:28:22,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 10:28:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-09-21 10:28:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-21 10:28:22,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:22,959 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] [2020-09-21 10:28:22,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:28:22,959 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-09-21 10:28:22,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:22,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434225535] [2020-09-21 10:28:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:23,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:23,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:28:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:23,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:28:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:23,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434225535] [2020-09-21 10:28:23,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:23,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 10:28:23,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438411290] [2020-09-21 10:28:23,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 10:28:23,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:23,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 10:28:23,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:28:23,378 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-09-21 10:28:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:24,757 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-09-21 10:28:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 10:28:24,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-09-21 10:28:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:24,760 INFO L225 Difference]: With dead ends: 568 [2020-09-21 10:28:24,761 INFO L226 Difference]: Without dead ends: 518 [2020-09-21 10:28:24,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:28:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-09-21 10:28:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-09-21 10:28:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-21 10:28:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-09-21 10:28:24,773 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-09-21 10:28:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:24,773 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-09-21 10:28:24,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 10:28:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-09-21 10:28:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 10:28:24,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:24,774 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] [2020-09-21 10:28:24,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:28:24,775 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:24,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-09-21 10:28:24,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:24,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002281490] [2020-09-21 10:28:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:25,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:25,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:28:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:25,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:28:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:25,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002281490] [2020-09-21 10:28:25,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:25,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 10:28:25,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33763361] [2020-09-21 10:28:25,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 10:28:25,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 10:28:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:28:25,222 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-09-21 10:28:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:26,734 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-09-21 10:28:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 10:28:26,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-09-21 10:28:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:26,738 INFO L225 Difference]: With dead ends: 591 [2020-09-21 10:28:26,738 INFO L226 Difference]: Without dead ends: 541 [2020-09-21 10:28:26,739 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 [2020-09-21 10:28:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-09-21 10:28:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-09-21 10:28:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-21 10:28:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-09-21 10:28:26,750 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-09-21 10:28:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:26,750 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-09-21 10:28:26,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 10:28:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-09-21 10:28:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 10:28:26,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:26,751 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] [2020-09-21 10:28:26,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:28:26,752 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-09-21 10:28:26,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:26,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173357093] [2020-09-21 10:28:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:27,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:27,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:28:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:27,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:28:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:27,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173357093] [2020-09-21 10:28:27,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:27,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 10:28:27,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71823711] [2020-09-21 10:28:27,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 10:28:27,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 10:28:27,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:28:27,243 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-09-21 10:28:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:28,862 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-09-21 10:28:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 10:28:28,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-09-21 10:28:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:28,866 INFO L225 Difference]: With dead ends: 614 [2020-09-21 10:28:28,866 INFO L226 Difference]: Without dead ends: 564 [2020-09-21 10:28:28,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:28:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-09-21 10:28:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-09-21 10:28:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-21 10:28:28,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-09-21 10:28:28,877 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-09-21 10:28:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:28,877 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-09-21 10:28:28,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 10:28:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-09-21 10:28:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-21 10:28:28,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:28,879 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] [2020-09-21 10:28:28,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:28:28,879 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:28,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:28,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-09-21 10:28:28,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:28,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342507365] [2020-09-21 10:28:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:29,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:29,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:28:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:29,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:28:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:29,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342507365] [2020-09-21 10:28:29,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:29,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 10:28:29,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600984477] [2020-09-21 10:28:29,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 10:28:29,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:29,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 10:28:29,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:28:29,390 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-09-21 10:28:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:31,601 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-09-21 10:28:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 10:28:31,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-09-21 10:28:31,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:31,606 INFO L225 Difference]: With dead ends: 637 [2020-09-21 10:28:31,606 INFO L226 Difference]: Without dead ends: 587 [2020-09-21 10:28:31,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:28:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-09-21 10:28:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-09-21 10:28:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-21 10:28:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-09-21 10:28:31,634 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-09-21 10:28:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:31,635 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-09-21 10:28:31,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 10:28:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-09-21 10:28:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 10:28:31,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:31,637 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] [2020-09-21 10:28:31,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 10:28:31,638 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-09-21 10:28:31,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:31,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030102554] [2020-09-21 10:28:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:32,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:32,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:28:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:32,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:28:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:32,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030102554] [2020-09-21 10:28:32,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:32,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 10:28:32,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056880602] [2020-09-21 10:28:32,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 10:28:32,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 10:28:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:28:32,272 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-09-21 10:28:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:34,779 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-09-21 10:28:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 10:28:34,780 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-09-21 10:28:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:34,784 INFO L225 Difference]: With dead ends: 660 [2020-09-21 10:28:34,785 INFO L226 Difference]: Without dead ends: 610 [2020-09-21 10:28:34,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:28:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-09-21 10:28:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-09-21 10:28:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-21 10:28:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-09-21 10:28:34,798 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-09-21 10:28:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:34,798 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-09-21 10:28:34,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 10:28:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-09-21 10:28:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-21 10:28:34,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:34,800 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] [2020-09-21 10:28:34,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 10:28:34,800 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-09-21 10:28:34,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:34,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566900902] [2020-09-21 10:28:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:35,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:35,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:28:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:35,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:28:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:35,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566900902] [2020-09-21 10:28:35,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:35,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 10:28:35,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423724526] [2020-09-21 10:28:35,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 10:28:35,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:35,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 10:28:35,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:28:35,380 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-09-21 10:28:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:37,427 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-09-21 10:28:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 10:28:37,428 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-09-21 10:28:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:37,432 INFO L225 Difference]: With dead ends: 683 [2020-09-21 10:28:37,432 INFO L226 Difference]: Without dead ends: 633 [2020-09-21 10:28:37,433 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 [2020-09-21 10:28:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-09-21 10:28:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-09-21 10:28:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-21 10:28:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-09-21 10:28:37,443 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-09-21 10:28:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:37,444 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-09-21 10:28:37,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 10:28:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-09-21 10:28:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-21 10:28:37,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:37,445 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] [2020-09-21 10:28:37,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 10:28:37,445 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:37,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-09-21 10:28:37,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:37,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726028934] [2020-09-21 10:28:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:37,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:37,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:28:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:37,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:28:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:38,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726028934] [2020-09-21 10:28:38,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:38,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 10:28:38,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743420224] [2020-09-21 10:28:38,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 10:28:38,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 10:28:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:28:38,003 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-09-21 10:28:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:40,414 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-09-21 10:28:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 10:28:40,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-09-21 10:28:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:40,418 INFO L225 Difference]: With dead ends: 706 [2020-09-21 10:28:40,419 INFO L226 Difference]: Without dead ends: 656 [2020-09-21 10:28:40,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:28:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-09-21 10:28:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-09-21 10:28:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-21 10:28:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-09-21 10:28:40,430 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-09-21 10:28:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:40,430 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-09-21 10:28:40,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 10:28:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-09-21 10:28:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-21 10:28:40,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:40,431 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] [2020-09-21 10:28:40,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 10:28:40,432 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-09-21 10:28:40,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:40,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587320631] [2020-09-21 10:28:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:41,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:41,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:28:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:41,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:28:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:41,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587320631] [2020-09-21 10:28:41,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:41,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 10:28:41,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977299695] [2020-09-21 10:28:41,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 10:28:41,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 10:28:41,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-09-21 10:28:41,068 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-09-21 10:28:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:43,650 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-09-21 10:28:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 10:28:43,651 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-09-21 10:28:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:43,653 INFO L225 Difference]: With dead ends: 729 [2020-09-21 10:28:43,654 INFO L226 Difference]: Without dead ends: 679 [2020-09-21 10:28:43,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 10:28:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-09-21 10:28:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-09-21 10:28:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-21 10:28:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-09-21 10:28:43,664 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-09-21 10:28:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:43,664 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-09-21 10:28:43,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 10:28:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-09-21 10:28:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 10:28:43,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:43,666 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] [2020-09-21 10:28:43,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 10:28:43,666 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-09-21 10:28:43,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:43,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032470117] [2020-09-21 10:28:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:44,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:44,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:28:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:44,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:28:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:44,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032470117] [2020-09-21 10:28:44,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:44,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 10:28:44,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373986031] [2020-09-21 10:28:44,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 10:28:44,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:44,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 10:28:44,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:28:44,263 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-09-21 10:28:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:46,409 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-09-21 10:28:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 10:28:46,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-09-21 10:28:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:46,413 INFO L225 Difference]: With dead ends: 752 [2020-09-21 10:28:46,413 INFO L226 Difference]: Without dead ends: 702 [2020-09-21 10:28:46,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 10:28:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-09-21 10:28:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-09-21 10:28:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-21 10:28:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-09-21 10:28:46,431 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-09-21 10:28:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:46,431 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-09-21 10:28:46,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 10:28:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-09-21 10:28:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-21 10:28:46,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:46,433 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] [2020-09-21 10:28:46,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 10:28:46,433 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:46,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-09-21 10:28:46,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:46,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041229402] [2020-09-21 10:28:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:46,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:46,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:28:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:46,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:28:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-09-21 10:28:46,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041229402] [2020-09-21 10:28:46,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:46,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:46,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726364037] [2020-09-21 10:28:46,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:46,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:46,528 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-09-21 10:28:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:46,687 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-09-21 10:28:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:28:46,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-09-21 10:28:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:46,689 INFO L225 Difference]: With dead ends: 177 [2020-09-21 10:28:46,689 INFO L226 Difference]: Without dead ends: 132 [2020-09-21 10:28:46,689 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 [2020-09-21 10:28:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-21 10:28:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-09-21 10:28:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-21 10:28:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-09-21 10:28:46,696 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-09-21 10:28:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:46,697 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-09-21 10:28:46,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-09-21 10:28:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 10:28:46,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:46,698 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] [2020-09-21 10:28:46,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 10:28:46,698 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-09-21 10:28:46,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:46,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407132418] [2020-09-21 10:28:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:46,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:46,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:28:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:46,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:28:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-09-21 10:28:46,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407132418] [2020-09-21 10:28:46,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:46,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:28:46,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084106389] [2020-09-21 10:28:46,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:28:46,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:46,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:28:46,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:46,792 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-09-21 10:28:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:47,042 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-09-21 10:28:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:28:47,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-09-21 10:28:47,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:47,045 INFO L225 Difference]: With dead ends: 200 [2020-09-21 10:28:47,045 INFO L226 Difference]: Without dead ends: 155 [2020-09-21 10:28:47,046 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 [2020-09-21 10:28:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-21 10:28:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-09-21 10:28:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-21 10:28:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-09-21 10:28:47,056 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-09-21 10:28:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:47,057 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-09-21 10:28:47,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:28:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-09-21 10:28:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:28:47,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:47,059 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] [2020-09-21 10:28:47,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 10:28:47,061 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-09-21 10:28:47,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:47,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932428407] [2020-09-21 10:28:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:47,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:47,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:28:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:47,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:28:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-09-21 10:28:47,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932428407] [2020-09-21 10:28:47,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:47,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:28:47,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047832010] [2020-09-21 10:28:47,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:28:47,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:28:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:47,232 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-09-21 10:28:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:47,440 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-09-21 10:28:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:28:47,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-09-21 10:28:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:47,442 INFO L225 Difference]: With dead ends: 187 [2020-09-21 10:28:47,442 INFO L226 Difference]: Without dead ends: 139 [2020-09-21 10:28:47,443 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 [2020-09-21 10:28:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-21 10:28:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-09-21 10:28:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-21 10:28:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-09-21 10:28:47,455 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-09-21 10:28:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:47,455 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-09-21 10:28:47,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:28:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-09-21 10:28:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:28:47,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:47,457 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] [2020-09-21 10:28:47,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 10:28:47,458 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-09-21 10:28:47,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:47,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112688800] [2020-09-21 10:28:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:47,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:47,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:28:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:47,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:28:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-09-21 10:28:47,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112688800] [2020-09-21 10:28:47,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:47,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:28:47,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640087743] [2020-09-21 10:28:47,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:28:47,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:47,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:28:47,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:47,647 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-09-21 10:28:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:47,835 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-09-21 10:28:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:28:47,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-09-21 10:28:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:47,837 INFO L225 Difference]: With dead ends: 157 [2020-09-21 10:28:47,837 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:28:47,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:28:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:28:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:28:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:28:47,840 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-09-21 10:28:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:47,840 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:28:47,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:28:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:28:47,843 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:28:47,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 10:28:47,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:28:48,197 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-09-21 10:28:48,197 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-09-21 10:28:48,197 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-21 10:28:48,197 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-09-21 10:28:48,197 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-09-21 10:28:48,197 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|)) [2020-09-21 10:28:48,198 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-09-21 10:28:48,198 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:28:48,198 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|)) [2020-09-21 10:28:48,198 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:28:48,198 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-09-21 10:28:48,198 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-09-21 10:28:48,198 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-09-21 10:28:48,199 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:28:48,199 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:28:48,199 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:28:48,199 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:28:48,199 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-09-21 10:28:48,199 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-09-21 10:28:48,200 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-09-21 10:28:48,200 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-09-21 10:28:48,200 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 10:28:48,200 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-09-21 10:28:48,200 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 10:28:48,200 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-09-21 10:28:48,200 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-09-21 10:28:48,201 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 10:28:48,202 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-09-21 10:28:48,202 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-09-21 10:28:48,202 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-09-21 10:28:48,202 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-09-21 10:28:48,202 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-09-21 10:28:48,202 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-09-21 10:28:48,202 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-09-21 10:28:48,203 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-09-21 10:28:48,203 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-09-21 10:28:48,203 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-09-21 10:28:48,203 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-09-21 10:28:48,203 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-09-21 10:28:48,203 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-09-21 10:28:48,203 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-09-21 10:28:48,204 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-09-21 10:28:48,204 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 10:28:48,205 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-09-21 10:28:48,205 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 10:28:48,205 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-09-21 10:28:48,205 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-09-21 10:28:48,205 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-09-21 10:28:48,205 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-09-21 10:28:48,206 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-09-21 10:28:48,206 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-09-21 10:28:48,206 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-09-21 10:28:48,207 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-09-21 10:28:48,207 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-09-21 10:28:48,207 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-09-21 10:28:48,207 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-09-21 10:28:48,207 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-09-21 10:28:48,207 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-09-21 10:28:48,208 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-09-21 10:28:48,208 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-09-21 10:28:48,208 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-09-21 10:28:48,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:28:48 BoogieIcfgContainer [2020-09-21 10:28:48,239 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:28:48,245 INFO L168 Benchmark]: Toolchain (without parser) took 46224.30 ms. Allocated memory was 145.2 MB in the beginning and 424.7 MB in the end (delta: 279.4 MB). Free memory was 102.9 MB in the beginning and 222.2 MB in the end (delta: -119.3 MB). Peak memory consumption was 160.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:48,245 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:28:48,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 472.45 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 181.3 MB in the end (delta: -79.2 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:48,246 INFO L168 Benchmark]: Boogie Preprocessor took 57.23 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 178.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:48,247 INFO L168 Benchmark]: RCFGBuilder took 566.15 ms. Allocated memory is still 202.4 MB. Free memory was 178.5 MB in the beginning and 155.1 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:48,247 INFO L168 Benchmark]: TraceAbstraction took 45118.04 ms. Allocated memory was 202.4 MB in the beginning and 424.7 MB in the end (delta: 222.3 MB). Free memory was 154.4 MB in the beginning and 222.2 MB in the end (delta: -67.7 MB). Peak memory consumption was 154.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:48,249 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 472.45 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 181.3 MB in the end (delta: -79.2 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.23 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 178.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 566.15 ms. Allocated memory is still 202.4 MB. Free memory was 178.5 MB in the beginning and 155.1 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 45118.04 ms. Allocated memory was 202.4 MB in the beginning and 424.7 MB in the end (delta: 222.3 MB). Free memory was 154.4 MB in the beginning and 222.2 MB in the end (delta: -67.7 MB). Peak memory consumption was 154.6 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: 44.6s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 34.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 7.5s 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: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.3s 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...