/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:00:40,415 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 06:00:40,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:00:40,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:00:40,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:00:40,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:00:40,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:00:40,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:00:40,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:00:40,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:00:40,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:00:40,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:00:40,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:00:40,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:00:40,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:00:40,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:00:40,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:00:40,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:00:40,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:00:40,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:00:40,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:00:40,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:00:40,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:00:40,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:00:40,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:00:40,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:00:40,518 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 [2020-08-19 06:00:40,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:00:40,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:00:40,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:00:40,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:00:40,543 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:00:40,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:00:40,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:00:40,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:00:40,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:00:40,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:00:40,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:00:40,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:00:40,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:00:40,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:00:40,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:00:40,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:00:40,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:00:40,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:00:40,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:00:40,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:00:40,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:00:40,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:00:40,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:00:40,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:00:40,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:00:40,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:00:40,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:00:40,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:00:40,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:00:40,548 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=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 06:00:40,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:00:40,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:00:40,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:00:40,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:00:40,849 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:00:40,849 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-19 06:00:40,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9c4cc51/2f0909cb92e14bbd9dd6a6951280ae08/FLAG9129c2e30 [2020-08-19 06:00:41,290 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:00:41,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-19 06:00:41,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9c4cc51/2f0909cb92e14bbd9dd6a6951280ae08/FLAG9129c2e30 [2020-08-19 06:00:41,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c9c4cc51/2f0909cb92e14bbd9dd6a6951280ae08 [2020-08-19 06:00:41,664 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:00:41,665 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:00:41,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:00:41,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:00:41,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:00:41,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:41,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b302c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41, skipping insertion in model container [2020-08-19 06:00:41,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:41,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:00:41,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:00:41,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:00:41,859 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:00:41,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:00:41,900 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:00:41,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41 WrapperNode [2020-08-19 06:00:41,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:00:41,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:00:41,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:00:41,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:00:42,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:42,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:42,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:42,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:42,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:42,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:42,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (1/1) ... [2020-08-19 06:00:42,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:00:42,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:00:42,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:00:42,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:00:42,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (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 [2020-08-19 06:00:42,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:00:42,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:00:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:00:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:00:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:00:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:00:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:00:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:00:42,357 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:00:42,358 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:00:42,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:00:42 BoogieIcfgContainer [2020-08-19 06:00:42,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:00:42,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:00:42,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:00:42,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:00:42,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:00:41" (1/3) ... [2020-08-19 06:00:42,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e85871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:00:42, skipping insertion in model container [2020-08-19 06:00:42,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:00:41" (2/3) ... [2020-08-19 06:00:42,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e85871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:00:42, skipping insertion in model container [2020-08-19 06:00:42,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:00:42" (3/3) ... [2020-08-19 06:00:42,371 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-19 06:00:42,383 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:00:42,391 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:00:42,407 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:00:42,433 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:00:42,433 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:00:42,433 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:00:42,434 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:00:42,434 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:00:42,434 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:00:42,434 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:00:42,434 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:00:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-19 06:00:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:00:42,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:42,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-19 06:00:42,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055367839] [2020-08-19 06:00:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055367839] [2020-08-19 06:00:42,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350583400] [2020-08-19 06:00:42,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,703 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-19 06:00:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,753 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-19 06:00:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:00:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,772 INFO L225 Difference]: With dead ends: 75 [2020-08-19 06:00:42,772 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 06:00:42,778 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 [2020-08-19 06:00:42,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 06:00:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-19 06:00:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 06:00:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-19 06:00:42,819 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-19 06:00:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,819 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-19 06:00:42,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-19 06:00:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:00:42,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:42,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:00:42,822 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-19 06:00:42,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672279936] [2020-08-19 06:00:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:42,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672279936] [2020-08-19 06:00:42,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:42,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:42,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546350588] [2020-08-19 06:00:42,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:42,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:42,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:42,910 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-19 06:00:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:42,940 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-19 06:00:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:42,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:00:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:42,943 INFO L225 Difference]: With dead ends: 97 [2020-08-19 06:00:42,943 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 06:00:42,944 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 [2020-08-19 06:00:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 06:00:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-19 06:00:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 06:00:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-19 06:00:42,955 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-19 06:00:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:42,956 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-19 06:00:42,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-19 06:00:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:00:42,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:42,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:42,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:00:42,958 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:42,959 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-19 06:00:42,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:42,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544402902] [2020-08-19 06:00:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544402902] [2020-08-19 06:00:43,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532429878] [2020-08-19 06:00:43,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,029 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-19 06:00:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,051 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-19 06:00:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:00:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,054 INFO L225 Difference]: With dead ends: 90 [2020-08-19 06:00:43,054 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 06:00:43,055 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 [2020-08-19 06:00:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 06:00:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-19 06:00:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 06:00:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-19 06:00:43,065 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-19 06:00:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,066 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-19 06:00:43,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-19 06:00:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:00:43,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:43,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:00:43,068 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,069 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-19 06:00:43,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686173153] [2020-08-19 06:00:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686173153] [2020-08-19 06:00:43,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735991338] [2020-08-19 06:00:43,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,118 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-19 06:00:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,145 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-19 06:00:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:00:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,148 INFO L225 Difference]: With dead ends: 112 [2020-08-19 06:00:43,148 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 06:00:43,149 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 [2020-08-19 06:00:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 06:00:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-19 06:00:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-19 06:00:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-19 06:00:43,162 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-19 06:00:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,162 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-19 06:00:43,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-19 06:00:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:00:43,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:00:43,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:00:43,164 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-19 06:00:43,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888707740] [2020-08-19 06:00:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888707740] [2020-08-19 06:00:43,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074555027] [2020-08-19 06:00:43,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,201 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-19 06:00:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,226 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-19 06:00:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:00:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,229 INFO L225 Difference]: With dead ends: 184 [2020-08-19 06:00:43,229 INFO L226 Difference]: Without dead ends: 112 [2020-08-19 06:00:43,230 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 [2020-08-19 06:00:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-19 06:00:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-19 06:00:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-19 06:00:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-19 06:00:43,245 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-19 06:00:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,246 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-19 06:00:43,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-19 06:00:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:00:43,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,247 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] [2020-08-19 06:00:43,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:00:43,248 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-19 06:00:43,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258904993] [2020-08-19 06:00:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258904993] [2020-08-19 06:00:43,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910743492] [2020-08-19 06:00:43,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,286 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-19 06:00:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,306 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-19 06:00:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:00:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,308 INFO L225 Difference]: With dead ends: 165 [2020-08-19 06:00:43,308 INFO L226 Difference]: Without dead ends: 114 [2020-08-19 06:00:43,311 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 [2020-08-19 06:00:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-19 06:00:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-19 06:00:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-19 06:00:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-19 06:00:43,322 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-19 06:00:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,322 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-19 06:00:43,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-19 06:00:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:00:43,324 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,324 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] [2020-08-19 06:00:43,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:00:43,325 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,326 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-19 06:00:43,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672440793] [2020-08-19 06:00:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672440793] [2020-08-19 06:00:43,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215800171] [2020-08-19 06:00:43,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,390 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-19 06:00:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,421 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-19 06:00:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:00:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,424 INFO L225 Difference]: With dead ends: 204 [2020-08-19 06:00:43,424 INFO L226 Difference]: Without dead ends: 202 [2020-08-19 06:00:43,425 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 [2020-08-19 06:00:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-19 06:00:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-19 06:00:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-19 06:00:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-19 06:00:43,438 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-19 06:00:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,439 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-19 06:00:43,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-19 06:00:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:00:43,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,441 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] [2020-08-19 06:00:43,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:00:43,441 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-19 06:00:43,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836023899] [2020-08-19 06:00:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836023899] [2020-08-19 06:00:43,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045842399] [2020-08-19 06:00:43,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,471 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-19 06:00:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,499 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-19 06:00:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:00:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,503 INFO L225 Difference]: With dead ends: 352 [2020-08-19 06:00:43,503 INFO L226 Difference]: Without dead ends: 210 [2020-08-19 06:00:43,505 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 [2020-08-19 06:00:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-19 06:00:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-19 06:00:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-19 06:00:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-19 06:00:43,538 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-19 06:00:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,538 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-19 06:00:43,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-19 06:00:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:00:43,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,540 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] [2020-08-19 06:00:43,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:00:43,540 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-19 06:00:43,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309173279] [2020-08-19 06:00:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309173279] [2020-08-19 06:00:43,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816201426] [2020-08-19 06:00:43,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,609 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-19 06:00:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,633 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-19 06:00:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:00:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,636 INFO L225 Difference]: With dead ends: 312 [2020-08-19 06:00:43,636 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 06:00:43,637 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 [2020-08-19 06:00:43,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 06:00:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-19 06:00:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-19 06:00:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-19 06:00:43,649 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-19 06:00:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,650 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-19 06:00:43,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-19 06:00:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:00:43,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,651 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] [2020-08-19 06:00:43,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:00:43,652 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,652 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-19 06:00:43,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312629712] [2020-08-19 06:00:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312629712] [2020-08-19 06:00:43,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417487920] [2020-08-19 06:00:43,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,680 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-19 06:00:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,701 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-19 06:00:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:00:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,704 INFO L225 Difference]: With dead ends: 380 [2020-08-19 06:00:43,704 INFO L226 Difference]: Without dead ends: 378 [2020-08-19 06:00:43,705 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 [2020-08-19 06:00:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-19 06:00:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-19 06:00:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-19 06:00:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-19 06:00:43,717 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-19 06:00:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,718 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-19 06:00:43,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-19 06:00:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:00:43,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,720 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] [2020-08-19 06:00:43,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:00:43,721 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-19 06:00:43,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782456177] [2020-08-19 06:00:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782456177] [2020-08-19 06:00:43,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832109528] [2020-08-19 06:00:43,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,756 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-19 06:00:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,782 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-19 06:00:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:00:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,785 INFO L225 Difference]: With dead ends: 684 [2020-08-19 06:00:43,785 INFO L226 Difference]: Without dead ends: 402 [2020-08-19 06:00:43,787 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 [2020-08-19 06:00:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-19 06:00:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-19 06:00:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-19 06:00:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-19 06:00:43,803 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-19 06:00:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,803 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-19 06:00:43,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-19 06:00:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:00:43,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,805 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] [2020-08-19 06:00:43,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:00:43,805 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-19 06:00:43,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729838759] [2020-08-19 06:00:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729838759] [2020-08-19 06:00:43,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796095291] [2020-08-19 06:00:43,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,830 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-19 06:00:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,850 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-19 06:00:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:00:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,853 INFO L225 Difference]: With dead ends: 600 [2020-08-19 06:00:43,853 INFO L226 Difference]: Without dead ends: 410 [2020-08-19 06:00:43,854 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 [2020-08-19 06:00:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-19 06:00:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-19 06:00:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-19 06:00:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-19 06:00:43,869 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-19 06:00:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,869 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-19 06:00:43,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-19 06:00:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:00:43,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,871 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] [2020-08-19 06:00:43,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:00:43,871 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-19 06:00:43,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413981557] [2020-08-19 06:00:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413981557] [2020-08-19 06:00:43,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234568947] [2020-08-19 06:00:43,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,898 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-19 06:00:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:43,926 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-19 06:00:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:43,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:00:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:43,930 INFO L225 Difference]: With dead ends: 716 [2020-08-19 06:00:43,930 INFO L226 Difference]: Without dead ends: 714 [2020-08-19 06:00:43,931 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 [2020-08-19 06:00:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-19 06:00:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-19 06:00:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-19 06:00:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-19 06:00:43,950 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-19 06:00:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:43,950 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-19 06:00:43,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-19 06:00:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:00:43,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:43,952 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] [2020-08-19 06:00:43,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:00:43,952 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-19 06:00:43,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:43,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820075020] [2020-08-19 06:00:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:43,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820075020] [2020-08-19 06:00:43,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:43,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:43,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968413698] [2020-08-19 06:00:43,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:43,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:43,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:43,976 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-19 06:00:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:44,002 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-19 06:00:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:44,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:00:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:44,007 INFO L225 Difference]: With dead ends: 1340 [2020-08-19 06:00:44,007 INFO L226 Difference]: Without dead ends: 778 [2020-08-19 06:00:44,009 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 [2020-08-19 06:00:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-19 06:00:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-19 06:00:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 06:00:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-19 06:00:44,036 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-19 06:00:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:44,037 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-19 06:00:44,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-19 06:00:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:00:44,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:44,039 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] [2020-08-19 06:00:44,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:00:44,039 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:44,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-19 06:00:44,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:44,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016511555] [2020-08-19 06:00:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:44,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016511555] [2020-08-19 06:00:44,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:44,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:44,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843245616] [2020-08-19 06:00:44,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:44,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:44,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:44,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:44,069 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-19 06:00:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:44,097 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-19 06:00:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:44,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:00:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:44,101 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 06:00:44,102 INFO L226 Difference]: Without dead ends: 794 [2020-08-19 06:00:44,105 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 [2020-08-19 06:00:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-19 06:00:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-19 06:00:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-19 06:00:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-19 06:00:44,134 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-19 06:00:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:44,134 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-19 06:00:44,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-19 06:00:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:00:44,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:44,136 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] [2020-08-19 06:00:44,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:00:44,137 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-19 06:00:44,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:44,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309177604] [2020-08-19 06:00:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:44,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309177604] [2020-08-19 06:00:44,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:44,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:44,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371076063] [2020-08-19 06:00:44,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:44,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:44,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:44,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:44,176 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-19 06:00:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:44,218 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-19 06:00:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:44,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:00:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:44,224 INFO L225 Difference]: With dead ends: 1356 [2020-08-19 06:00:44,224 INFO L226 Difference]: Without dead ends: 1354 [2020-08-19 06:00:44,225 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 [2020-08-19 06:00:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-19 06:00:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-19 06:00:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-19 06:00:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-19 06:00:44,259 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-19 06:00:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:44,259 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-19 06:00:44,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-19 06:00:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:00:44,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:44,261 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, 1, 1, 1] [2020-08-19 06:00:44,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:00:44,262 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-19 06:00:44,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:44,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523584531] [2020-08-19 06:00:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:44,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523584531] [2020-08-19 06:00:44,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:44,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:44,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161058885] [2020-08-19 06:00:44,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:44,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:44,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:44,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:44,285 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-19 06:00:44,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:44,327 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-19 06:00:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:44,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:00:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:44,334 INFO L225 Difference]: With dead ends: 2636 [2020-08-19 06:00:44,334 INFO L226 Difference]: Without dead ends: 1514 [2020-08-19 06:00:44,336 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 [2020-08-19 06:00:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-19 06:00:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-19 06:00:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-19 06:00:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-19 06:00:44,379 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-19 06:00:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:44,379 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-19 06:00:44,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-19 06:00:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:00:44,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:44,382 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] [2020-08-19 06:00:44,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:00:44,382 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:44,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-19 06:00:44,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:44,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075676755] [2020-08-19 06:00:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:44,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075676755] [2020-08-19 06:00:44,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:44,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:44,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369483138] [2020-08-19 06:00:44,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:44,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:44,407 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-19 06:00:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:44,446 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-19 06:00:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:44,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:00:44,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:44,453 INFO L225 Difference]: With dead ends: 2268 [2020-08-19 06:00:44,453 INFO L226 Difference]: Without dead ends: 1546 [2020-08-19 06:00:44,455 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 [2020-08-19 06:00:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-19 06:00:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-19 06:00:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 06:00:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-19 06:00:44,500 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-19 06:00:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:44,501 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-19 06:00:44,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-19 06:00:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:00:44,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:44,503 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] [2020-08-19 06:00:44,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:00:44,504 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:44,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-19 06:00:44,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:44,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263616640] [2020-08-19 06:00:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:44,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263616640] [2020-08-19 06:00:44,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:44,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:44,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8241580] [2020-08-19 06:00:44,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:44,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:44,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:44,527 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-19 06:00:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:44,596 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-19 06:00:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:44,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:00:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:44,612 INFO L225 Difference]: With dead ends: 2572 [2020-08-19 06:00:44,613 INFO L226 Difference]: Without dead ends: 2570 [2020-08-19 06:00:44,614 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 [2020-08-19 06:00:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-19 06:00:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-19 06:00:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-19 06:00:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-19 06:00:44,714 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-19 06:00:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:44,714 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-19 06:00:44,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-19 06:00:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:00:44,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:44,721 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] [2020-08-19 06:00:44,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:00:44,721 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-19 06:00:44,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:44,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564526136] [2020-08-19 06:00:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:44,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564526136] [2020-08-19 06:00:44,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:44,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:44,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122462476] [2020-08-19 06:00:44,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:44,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:44,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:44,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:44,746 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-19 06:00:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:44,838 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-19 06:00:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:44,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:00:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:44,850 INFO L225 Difference]: With dead ends: 5196 [2020-08-19 06:00:44,850 INFO L226 Difference]: Without dead ends: 2954 [2020-08-19 06:00:44,855 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 [2020-08-19 06:00:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-19 06:00:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-19 06:00:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-19 06:00:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-19 06:00:44,947 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-19 06:00:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:44,948 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-19 06:00:44,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-19 06:00:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:00:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:44,952 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] [2020-08-19 06:00:44,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:00:44,952 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-19 06:00:44,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:44,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985723825] [2020-08-19 06:00:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:44,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985723825] [2020-08-19 06:00:44,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:44,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:44,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545558492] [2020-08-19 06:00:44,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:44,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:44,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:44,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:44,971 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-19 06:00:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:45,037 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-19 06:00:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:45,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:00:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:45,050 INFO L225 Difference]: With dead ends: 4428 [2020-08-19 06:00:45,050 INFO L226 Difference]: Without dead ends: 3018 [2020-08-19 06:00:45,053 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 [2020-08-19 06:00:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-19 06:00:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-19 06:00:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-19 06:00:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-19 06:00:45,139 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-19 06:00:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:45,139 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-19 06:00:45,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-19 06:00:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:00:45,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:45,144 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] [2020-08-19 06:00:45,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:00:45,144 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:45,144 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-19 06:00:45,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:45,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182983225] [2020-08-19 06:00:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:45,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:45,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182983225] [2020-08-19 06:00:45,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:45,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:45,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671836190] [2020-08-19 06:00:45,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:45,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:45,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:45,192 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-19 06:00:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:45,294 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-19 06:00:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:45,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:00:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:45,308 INFO L225 Difference]: With dead ends: 8650 [2020-08-19 06:00:45,308 INFO L226 Difference]: Without dead ends: 3016 [2020-08-19 06:00:45,318 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 [2020-08-19 06:00:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-19 06:00:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-19 06:00:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-19 06:00:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-19 06:00:45,397 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-19 06:00:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:45,398 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-19 06:00:45,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-19 06:00:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:00:45,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:00:45,402 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] [2020-08-19 06:00:45,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:00:45,402 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:00:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:00:45,403 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-19 06:00:45,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:00:45,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238882180] [2020-08-19 06:00:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:00:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:45,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:00:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:00:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:00:45,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238882180] [2020-08-19 06:00:45,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:00:45,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:00:45,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172601278] [2020-08-19 06:00:45,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:00:45,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:00:45,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:00:45,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:00:45,422 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-19 06:00:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:00:45,467 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-19 06:00:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:00:45,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:00:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:00:45,468 INFO L225 Difference]: With dead ends: 3016 [2020-08-19 06:00:45,468 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:00:45,473 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 [2020-08-19 06:00:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:00:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:00:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:00:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:00:45,474 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-19 06:00:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:00:45,474 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:00:45,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:00:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:00:45,475 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:00:45,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:00:45,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:00:45,498 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:00:45,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:00:45,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:00:45,499 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:00:45,499 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:00:45,499 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:00:45,499 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-19 06:00:45,499 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-19 06:00:45,499 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,499 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-19 06:00:45,499 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,500 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-19 06:00:45,500 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,500 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,500 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-19 06:00:45,500 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-19 06:00:45,500 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-19 06:00:45,500 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-19 06:00:45,500 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-19 06:00:45,501 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,501 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,501 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,501 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,501 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-19 06:00:45,501 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,501 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-19 06:00:45,501 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-19 06:00:45,502 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,502 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,502 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-19 06:00:45,502 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-19 06:00:45,502 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,502 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-19 06:00:45,502 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,503 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,503 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-19 06:00:45,503 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-19 06:00:45,503 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:00:45,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:00:45 BoogieIcfgContainer [2020-08-19 06:00:45,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:00:45,518 INFO L168 Benchmark]: Toolchain (without parser) took 3851.73 ms. Allocated memory was 145.8 MB in the beginning and 286.8 MB in the end (delta: 141.0 MB). Free memory was 104.4 MB in the beginning and 156.7 MB in the end (delta: -52.2 MB). Peak memory consumption was 88.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:45,518 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-19 06:00:45,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.39 ms. Allocated memory is still 145.8 MB. Free memory was 104.2 MB in the beginning and 93.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:45,519 INFO L168 Benchmark]: Boogie Preprocessor took 142.62 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 93.7 MB in the beginning and 182.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:45,520 INFO L168 Benchmark]: RCFGBuilder took 318.61 ms. Allocated memory is still 205.0 MB. Free memory was 182.2 MB in the beginning and 165.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:45,520 INFO L168 Benchmark]: TraceAbstraction took 3151.16 ms. Allocated memory was 205.0 MB in the beginning and 286.8 MB in the end (delta: 81.8 MB). Free memory was 164.5 MB in the beginning and 156.7 MB in the end (delta: 7.8 MB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:00:45,523 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.39 ms. Allocated memory is still 145.8 MB. Free memory was 104.2 MB in the beginning and 93.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.62 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 93.7 MB in the beginning and 182.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.61 ms. Allocated memory is still 205.0 MB. Free memory was 182.2 MB in the beginning and 165.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3151.16 ms. Allocated memory was 205.0 MB in the beginning and 286.8 MB in the end (delta: 81.8 MB). Free memory was 164.5 MB in the beginning and 156.7 MB in the end (delta: 7.8 MB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...