/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:55:27,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:55:27,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:55:27,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:55:27,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:55:27,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:55:27,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:55:27,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:55:27,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:55:27,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:55:27,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:55:27,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:55:27,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:55:27,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:55:27,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:55:27,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:55:27,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:55:27,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:55:27,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:55:27,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:55:27,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:55:27,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:55:27,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:55:27,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:55:27,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:55:27,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:55:27,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:55:27,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:55:27,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:55:27,358 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:55:27,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:55:27,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:55:27,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:55:27,360 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:55:27,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:55:27,361 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:55:27,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:55:27,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:55:27,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:55:27,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:55:27,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:55:27,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:55:27,362 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:55:27,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:55:27,363 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:55:27,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:55:27,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:55:27,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:55:27,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:55:27,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:55:27,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:27,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:55:27,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:55:27,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:55:27,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:55:27,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:55:27,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:55:27,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:55:27,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:55:27,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:55:27,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:55:27,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:55:27,708 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:55:27,709 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:55:27,709 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 21:55:27,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/205710789/940d7a058d1b4eb39ae6205fb29b1670/FLAG37261e938 [2020-08-18 21:55:28,260 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:55:28,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 21:55:28,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/205710789/940d7a058d1b4eb39ae6205fb29b1670/FLAG37261e938 [2020-08-18 21:55:28,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/205710789/940d7a058d1b4eb39ae6205fb29b1670 [2020-08-18 21:55:28,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:55:28,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:55:28,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:28,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:55:28,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:55:28,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:28,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4839a71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28, skipping insertion in model container [2020-08-18 21:55:28,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:28,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:55:28,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:55:28,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:28,887 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:55:28,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:28,925 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:55:28,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28 WrapperNode [2020-08-18 21:55:28,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:28,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:55:28,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:55:28,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:55:29,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:29,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:29,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:29,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:29,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:29,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:29,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:29,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:55:29,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:55:29,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:55:29,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:55:29,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:29,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:55:29,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:55:29,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:55:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:55:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:55:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:55:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:55:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:55:29,378 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:55:29,378 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:55:29,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:29 BoogieIcfgContainer [2020-08-18 21:55:29,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:55:29,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:55:29,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:55:29,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:55:29,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:55:28" (1/3) ... [2020-08-18 21:55:29,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0e9c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:29, skipping insertion in model container [2020-08-18 21:55:29,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28" (2/3) ... [2020-08-18 21:55:29,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0e9c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:29, skipping insertion in model container [2020-08-18 21:55:29,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:29" (3/3) ... [2020-08-18 21:55:29,391 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-18 21:55:29,403 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:55:29,411 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:55:29,427 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:55:29,462 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:55:29,462 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:55:29,463 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:55:29,463 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:55:29,463 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:55:29,463 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:55:29,464 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:55:29,464 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:55:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-18 21:55:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:55:29,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,500 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-18 21:55:29,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175155404] [2020-08-18 21:55:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175155404] [2020-08-18 21:55:29,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640373317] [2020-08-18 21:55:29,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,757 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-18 21:55:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,827 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-18 21:55:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:55:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,842 INFO L225 Difference]: With dead ends: 81 [2020-08-18 21:55:29,842 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 21:55:29,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 21:55:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-18 21:55:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 21:55:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-18 21:55:29,891 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-18 21:55:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,891 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-18 21:55:29,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-18 21:55:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:55:29,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:55:29,894 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-18 21:55:29,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434784251] [2020-08-18 21:55:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434784251] [2020-08-18 21:55:29,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458883760] [2020-08-18 21:55:29,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,966 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-18 21:55:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,994 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-18 21:55:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:55:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,997 INFO L225 Difference]: With dead ends: 107 [2020-08-18 21:55:29,997 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 21:55:29,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 21:55:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-18 21:55:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 21:55:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-18 21:55:30,011 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-18 21:55:30,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,012 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-18 21:55:30,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,012 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-18 21:55:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:55:30,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:55:30,014 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,015 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-18 21:55:30,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410679123] [2020-08-18 21:55:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410679123] [2020-08-18 21:55:30,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591599387] [2020-08-18 21:55:30,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,070 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-18 21:55:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,093 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-18 21:55:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:55:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,096 INFO L225 Difference]: With dead ends: 99 [2020-08-18 21:55:30,096 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 21:55:30,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 21:55:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-18 21:55:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 21:55:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-18 21:55:30,108 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-18 21:55:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,109 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-18 21:55:30,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-18 21:55:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:55:30,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:55:30,111 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,112 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-18 21:55:30,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138361797] [2020-08-18 21:55:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138361797] [2020-08-18 21:55:30,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600553691] [2020-08-18 21:55:30,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,210 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-18 21:55:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,233 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-18 21:55:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:55:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,235 INFO L225 Difference]: With dead ends: 124 [2020-08-18 21:55:30,236 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 21:55:30,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 21:55:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-18 21:55:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 21:55:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-18 21:55:30,256 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-18 21:55:30,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,256 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-18 21:55:30,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-18 21:55:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:55:30,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:55:30,261 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,262 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-18 21:55:30,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563081501] [2020-08-18 21:55:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563081501] [2020-08-18 21:55:30,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006172864] [2020-08-18 21:55:30,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,306 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-18 21:55:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,332 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-18 21:55:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:55:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,334 INFO L225 Difference]: With dead ends: 204 [2020-08-18 21:55:30,335 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 21:55:30,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 21:55:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-18 21:55:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 21:55:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-18 21:55:30,350 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-18 21:55:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,351 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-18 21:55:30,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-18 21:55:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:30,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:55:30,353 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-18 21:55:30,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824039286] [2020-08-18 21:55:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824039286] [2020-08-18 21:55:30,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381597730] [2020-08-18 21:55:30,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,404 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-18 21:55:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,430 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-18 21:55:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,432 INFO L225 Difference]: With dead ends: 183 [2020-08-18 21:55:30,432 INFO L226 Difference]: Without dead ends: 126 [2020-08-18 21:55:30,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-18 21:55:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-18 21:55:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 21:55:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-18 21:55:30,447 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-18 21:55:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,448 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-18 21:55:30,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-18 21:55:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:30,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:55:30,450 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-18 21:55:30,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691311808] [2020-08-18 21:55:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691311808] [2020-08-18 21:55:30,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334067166] [2020-08-18 21:55:30,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,508 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-18 21:55:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,527 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-18 21:55:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,530 INFO L225 Difference]: With dead ends: 228 [2020-08-18 21:55:30,530 INFO L226 Difference]: Without dead ends: 226 [2020-08-18 21:55:30,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-18 21:55:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-18 21:55:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 21:55:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-18 21:55:30,545 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-18 21:55:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,545 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-18 21:55:30,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-18 21:55:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:30,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:55:30,548 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-18 21:55:30,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582086206] [2020-08-18 21:55:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582086206] [2020-08-18 21:55:30,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625017034] [2020-08-18 21:55:30,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,585 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-18 21:55:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,606 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-18 21:55:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,609 INFO L225 Difference]: With dead ends: 392 [2020-08-18 21:55:30,609 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 21:55:30,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 21:55:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-18 21:55:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-18 21:55:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-18 21:55:30,628 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-18 21:55:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,628 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-18 21:55:30,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-18 21:55:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:30,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:55:30,631 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-18 21:55:30,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11512492] [2020-08-18 21:55:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11512492] [2020-08-18 21:55:30,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245705043] [2020-08-18 21:55:30,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,663 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-18 21:55:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,681 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-18 21:55:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,684 INFO L225 Difference]: With dead ends: 348 [2020-08-18 21:55:30,684 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 21:55:30,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 21:55:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-18 21:55:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-18 21:55:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-18 21:55:30,698 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-18 21:55:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,699 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-18 21:55:30,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-18 21:55:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:30,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:55:30,701 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,702 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-18 21:55:30,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998952229] [2020-08-18 21:55:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998952229] [2020-08-18 21:55:30,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033060549] [2020-08-18 21:55:30,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,730 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-18 21:55:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,763 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-18 21:55:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,767 INFO L225 Difference]: With dead ends: 428 [2020-08-18 21:55:30,768 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 21:55:30,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 21:55:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-18 21:55:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-18 21:55:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-18 21:55:30,782 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-18 21:55:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,783 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-18 21:55:30,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-18 21:55:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:30,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:55:30,786 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,787 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-18 21:55:30,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069563244] [2020-08-18 21:55:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069563244] [2020-08-18 21:55:30,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38010422] [2020-08-18 21:55:30,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,814 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-18 21:55:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,875 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-18 21:55:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,879 INFO L225 Difference]: With dead ends: 764 [2020-08-18 21:55:30,879 INFO L226 Difference]: Without dead ends: 450 [2020-08-18 21:55:30,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-18 21:55:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-18 21:55:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-18 21:55:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-18 21:55:30,908 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-18 21:55:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,909 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-18 21:55:30,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-18 21:55:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:30,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:55:30,911 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-18 21:55:30,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876182705] [2020-08-18 21:55:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876182705] [2020-08-18 21:55:30,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662334098] [2020-08-18 21:55:30,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,965 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-18 21:55:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,987 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-18 21:55:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,991 INFO L225 Difference]: With dead ends: 672 [2020-08-18 21:55:30,991 INFO L226 Difference]: Without dead ends: 458 [2020-08-18 21:55:30,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-18 21:55:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-18 21:55:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-18 21:55:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-18 21:55:31,010 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-18 21:55:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:31,011 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-18 21:55:31,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-18 21:55:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:31,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:31,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:31,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:55:31,019 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-18 21:55:31,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:31,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238792475] [2020-08-18 21:55:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:31,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238792475] [2020-08-18 21:55:31,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:31,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:31,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566796084] [2020-08-18 21:55:31,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:31,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:31,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:31,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,072 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-18 21:55:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:31,093 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-18 21:55:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:31,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:31,097 INFO L225 Difference]: With dead ends: 812 [2020-08-18 21:55:31,097 INFO L226 Difference]: Without dead ends: 810 [2020-08-18 21:55:31,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-18 21:55:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-18 21:55:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-18 21:55:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-18 21:55:31,115 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-18 21:55:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:31,117 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-18 21:55:31,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-18 21:55:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:31,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:31,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:31,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:55:31,119 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:31,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-18 21:55:31,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:31,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867438025] [2020-08-18 21:55:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:31,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867438025] [2020-08-18 21:55:31,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:31,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:31,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805087100] [2020-08-18 21:55:31,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:31,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:31,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:31,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,184 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-18 21:55:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:31,220 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-18 21:55:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:31,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:31,226 INFO L225 Difference]: With dead ends: 1500 [2020-08-18 21:55:31,226 INFO L226 Difference]: Without dead ends: 874 [2020-08-18 21:55:31,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-18 21:55:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-18 21:55:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-18 21:55:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-18 21:55:31,258 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-18 21:55:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:31,258 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-18 21:55:31,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-18 21:55:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:55:31,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:31,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:31,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:55:31,261 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-18 21:55:31,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:31,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829616] [2020-08-18 21:55:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:31,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829616] [2020-08-18 21:55:31,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:31,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:31,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465494931] [2020-08-18 21:55:31,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:31,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,309 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-18 21:55:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:31,338 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-18 21:55:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:31,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:55:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:31,343 INFO L225 Difference]: With dead ends: 1308 [2020-08-18 21:55:31,344 INFO L226 Difference]: Without dead ends: 890 [2020-08-18 21:55:31,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-18 21:55:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-18 21:55:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-18 21:55:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-18 21:55:31,398 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-18 21:55:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:31,399 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-18 21:55:31,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-18 21:55:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:55:31,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:31,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:31,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:55:31,402 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-18 21:55:31,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:31,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469970923] [2020-08-18 21:55:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:31,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469970923] [2020-08-18 21:55:31,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:31,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:31,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961509812] [2020-08-18 21:55:31,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:31,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:31,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:31,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,451 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-18 21:55:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:31,493 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-18 21:55:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:31,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:55:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:31,502 INFO L225 Difference]: With dead ends: 1548 [2020-08-18 21:55:31,502 INFO L226 Difference]: Without dead ends: 1546 [2020-08-18 21:55:31,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-18 21:55:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-18 21:55:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-18 21:55:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-18 21:55:31,557 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-18 21:55:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:31,558 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-18 21:55:31,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-18 21:55:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:55:31,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:31,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:31,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:55:31,562 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:31,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:31,563 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-18 21:55:31,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:31,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927368219] [2020-08-18 21:55:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:31,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927368219] [2020-08-18 21:55:31,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:31,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:31,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377910333] [2020-08-18 21:55:31,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:31,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:31,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:31,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,598 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-18 21:55:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:31,642 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-18 21:55:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:31,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:55:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:31,651 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 21:55:31,651 INFO L226 Difference]: Without dead ends: 1706 [2020-08-18 21:55:31,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-18 21:55:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-18 21:55:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-18 21:55:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-18 21:55:31,706 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-18 21:55:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:31,706 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-18 21:55:31,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-18 21:55:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:55:31,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:31,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:31,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:55:31,710 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-18 21:55:31,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:31,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126147608] [2020-08-18 21:55:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:31,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126147608] [2020-08-18 21:55:31,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:31,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:31,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787626774] [2020-08-18 21:55:31,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:31,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,736 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-18 21:55:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:31,779 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-18 21:55:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:31,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:55:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:31,788 INFO L225 Difference]: With dead ends: 2556 [2020-08-18 21:55:31,788 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 21:55:31,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 21:55:31,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-18 21:55:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-18 21:55:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-18 21:55:31,846 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-18 21:55:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:31,846 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-18 21:55:31,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-18 21:55:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:55:31,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:31,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:31,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:55:31,850 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-18 21:55:31,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:31,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311851940] [2020-08-18 21:55:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:31,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311851940] [2020-08-18 21:55:31,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:31,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:31,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323314662] [2020-08-18 21:55:31,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:31,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:31,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:31,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,873 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-18 21:55:31,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:31,931 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-18 21:55:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:31,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:55:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:31,945 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 21:55:31,945 INFO L226 Difference]: Without dead ends: 2954 [2020-08-18 21:55:31,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-18 21:55:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-18 21:55:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-18 21:55:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-18 21:55:32,041 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-18 21:55:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:32,042 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-18 21:55:32,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-18 21:55:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:55:32,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:32,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:32,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:55:32,048 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:32,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-18 21:55:32,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:32,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043975880] [2020-08-18 21:55:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:32,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043975880] [2020-08-18 21:55:32,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:32,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:32,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008024334] [2020-08-18 21:55:32,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:32,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:32,074 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-18 21:55:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:32,158 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-18 21:55:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:32,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:55:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:32,179 INFO L225 Difference]: With dead ends: 5836 [2020-08-18 21:55:32,179 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 21:55:32,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 21:55:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-18 21:55:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-18 21:55:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-18 21:55:32,312 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-18 21:55:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:32,312 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-18 21:55:32,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-18 21:55:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:55:32,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:32,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:32,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:55:32,320 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:32,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-18 21:55:32,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:32,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958135602] [2020-08-18 21:55:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:32,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958135602] [2020-08-18 21:55:32,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:32,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:32,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523842814] [2020-08-18 21:55:32,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:32,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:32,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:32,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:32,348 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-18 21:55:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:32,428 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-18 21:55:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:32,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:55:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:32,449 INFO L225 Difference]: With dead ends: 5004 [2020-08-18 21:55:32,449 INFO L226 Difference]: Without dead ends: 3402 [2020-08-18 21:55:32,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-18 21:55:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-18 21:55:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-18 21:55:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-18 21:55:32,587 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-18 21:55:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:32,587 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-18 21:55:32,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-18 21:55:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:55:32,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:32,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:32,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 21:55:32,593 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-18 21:55:32,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:32,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857484956] [2020-08-18 21:55:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:32,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857484956] [2020-08-18 21:55:32,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:32,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:32,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98083780] [2020-08-18 21:55:32,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:32,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:32,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:32,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:32,615 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-18 21:55:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:32,724 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-18 21:55:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:32,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:55:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:32,752 INFO L225 Difference]: With dead ends: 9804 [2020-08-18 21:55:32,753 INFO L226 Difference]: Without dead ends: 6538 [2020-08-18 21:55:32,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-18 21:55:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-18 21:55:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 21:55:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-18 21:55:32,953 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-18 21:55:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:32,953 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-18 21:55:32,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-18 21:55:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:55:32,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:32,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:32,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 21:55:32,962 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-18 21:55:32,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:32,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256594758] [2020-08-18 21:55:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:32,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256594758] [2020-08-18 21:55:32,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:32,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:32,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257453531] [2020-08-18 21:55:32,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:32,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:32,992 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-18 21:55:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:33,142 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-18 21:55:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:33,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:55:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:33,176 INFO L225 Difference]: With dead ends: 7052 [2020-08-18 21:55:33,176 INFO L226 Difference]: Without dead ends: 7050 [2020-08-18 21:55:33,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-18 21:55:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-18 21:55:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 21:55:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-18 21:55:33,390 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-18 21:55:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:33,390 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-18 21:55:33,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-18 21:55:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:55:33,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:33,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:33,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 21:55:33,404 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-18 21:55:33,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:33,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432650868] [2020-08-18 21:55:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:33,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:33,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432650868] [2020-08-18 21:55:33,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:33,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:33,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794425418] [2020-08-18 21:55:33,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:33,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:33,428 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-18 21:55:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:33,565 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-18 21:55:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:33,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:55:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:33,587 INFO L225 Difference]: With dead ends: 10634 [2020-08-18 21:55:33,587 INFO L226 Difference]: Without dead ends: 10632 [2020-08-18 21:55:33,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-18 21:55:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-18 21:55:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-18 21:55:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-18 21:55:33,860 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-18 21:55:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:33,860 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-18 21:55:33,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-18 21:55:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:55:33,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:33,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:33,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 21:55:33,878 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:33,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-18 21:55:33,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:33,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922066123] [2020-08-18 21:55:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:33,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:33,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922066123] [2020-08-18 21:55:33,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:33,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:33,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384289417] [2020-08-18 21:55:33,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:33,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:33,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:33,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:33,918 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-18 21:55:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:34,097 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-18 21:55:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:34,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:55:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:34,098 INFO L225 Difference]: With dead ends: 22664 [2020-08-18 21:55:34,098 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:55:34,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:55:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:55:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:55:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:55:34,130 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-18 21:55:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:34,131 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:55:34,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:55:34,131 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:55:34,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 21:55:34,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:55:34,157 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:55:34,157 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:55:34,157 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:55:34,157 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:55:34,157 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,158 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-18 21:55:34,159 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,160 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,160 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-18 21:55:34,160 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-18 21:55:34,160 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-18 21:55:34,161 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,161 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 21:55:34,161 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,161 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-18 21:55:34,161 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-18 21:55:34,161 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-18 21:55:34,161 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-18 21:55:34,161 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,162 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,162 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,162 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-18 21:55:34,162 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,162 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,162 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-18 21:55:34,162 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-18 21:55:34,162 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-18 21:55:34,162 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,163 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,163 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-18 21:55:34,163 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-18 21:55:34,163 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,163 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:55:34,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:55:34 BoogieIcfgContainer [2020-08-18 21:55:34,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:55:34,187 INFO L168 Benchmark]: Toolchain (without parser) took 5526.86 ms. Allocated memory was 140.0 MB in the beginning and 353.4 MB in the end (delta: 213.4 MB). Free memory was 102.8 MB in the beginning and 161.3 MB in the end (delta: -58.5 MB). Peak memory consumption was 154.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:34,188 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:55:34,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.09 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:34,189 INFO L168 Benchmark]: Boogie Preprocessor took 118.94 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 179.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:34,192 INFO L168 Benchmark]: RCFGBuilder took 337.00 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 160.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:34,196 INFO L168 Benchmark]: TraceAbstraction took 4799.99 ms. Allocated memory was 202.4 MB in the beginning and 353.4 MB in the end (delta: 151.0 MB). Free memory was 160.9 MB in the beginning and 161.3 MB in the end (delta: -367.6 kB). Peak memory consumption was 150.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:34,200 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.09 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.94 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 179.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.00 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 160.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4799.99 ms. Allocated memory was 202.4 MB in the beginning and 353.4 MB in the end (delta: 151.0 MB). Free memory was 160.9 MB in the beginning and 161.3 MB in the end (delta: -367.6 kB). Peak memory consumption was 150.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...