/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:57:30,087 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 18:57:30,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:57:30,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:57:30,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:57:30,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:57:30,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:57:30,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:57:30,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:57:30,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:57:30,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:57:30,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:57:30,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:57:30,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:57:30,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:57:30,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:57:30,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:57:30,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:57:30,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:57:30,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:57:30,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:57:30,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:57:30,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:57:30,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:57:30,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:57:30,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:57:30,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:57:30,230 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:57:30,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:57:30,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:57:30,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:57:30,232 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:57:30,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:57:30,232 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:57:30,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:57:30,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:57:30,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:57:30,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:57:30,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:57:30,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:57:30,234 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:57:30,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:57:30,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:57:30,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:57:30,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:57:30,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:57:30,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:57:30,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:57:30,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:30,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:57:30,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:57:30,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:57:30,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:57:30,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:57:30,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:57:30,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:57:30,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:57:30,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:57:30,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:57:30,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:57:30,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:57:30,588 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:57:30,589 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 18:57:30,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db24c685a/0298e3fbeefb4c228edb4a2f7a082dd8/FLAGa98d5c898 [2020-08-21 18:57:31,162 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:57:31,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 18:57:31,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db24c685a/0298e3fbeefb4c228edb4a2f7a082dd8/FLAGa98d5c898 [2020-08-21 18:57:31,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db24c685a/0298e3fbeefb4c228edb4a2f7a082dd8 [2020-08-21 18:57:31,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:57:31,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:57:31,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:31,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:57:31,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:57:31,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c32e65d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31, skipping insertion in model container [2020-08-21 18:57:31,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:57:31,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:57:31,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:31,784 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:57:31,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:31,823 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:57:31,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31 WrapperNode [2020-08-21 18:57:31,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:31,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:57:31,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:57:31,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:57:31,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:57:31,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:57:31,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:57:31,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:57:31,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:32,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:57:32,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:57:32,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:57:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:57:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:57:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:57:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:57:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:57:32,405 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:57:32,406 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:57:32,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:32 BoogieIcfgContainer [2020-08-21 18:57:32,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:57:32,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:57:32,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:57:32,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:57:32,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:57:31" (1/3) ... [2020-08-21 18:57:32,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7050928a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:32, skipping insertion in model container [2020-08-21 18:57:32,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31" (2/3) ... [2020-08-21 18:57:32,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7050928a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:32, skipping insertion in model container [2020-08-21 18:57:32,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:32" (3/3) ... [2020-08-21 18:57:32,423 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-21 18:57:32,431 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:57:32,441 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:57:32,454 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:57:32,481 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:57:32,481 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:57:32,481 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:57:32,481 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:57:32,481 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:57:32,481 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:57:32,482 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:57:32,482 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:57:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-21 18:57:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:57:32,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:32,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:32,507 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-21 18:57:32,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:32,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306927712] [2020-08-21 18:57:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:32,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:32,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306927712] [2020-08-21 18:57:32,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:32,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:32,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155221170] [2020-08-21 18:57:32,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:32,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:32,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:32,745 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-21 18:57:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:32,815 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-21 18:57:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:32,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 18:57:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:32,830 INFO L225 Difference]: With dead ends: 81 [2020-08-21 18:57:32,830 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 18:57:32,835 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 [2020-08-21 18:57:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 18:57:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-21 18:57:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 18:57:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-21 18:57:32,878 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-21 18:57:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:32,878 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-21 18:57:32,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-21 18:57:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:57:32,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:32,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:32,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:57:32,881 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:32,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:32,881 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-21 18:57:32,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:32,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719970142] [2020-08-21 18:57:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:32,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:32,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719970142] [2020-08-21 18:57:32,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:32,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:32,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608522145] [2020-08-21 18:57:32,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:32,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:32,950 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-21 18:57:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:32,978 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-21 18:57:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:32,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 18:57:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:32,980 INFO L225 Difference]: With dead ends: 107 [2020-08-21 18:57:32,981 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 18:57:32,982 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 [2020-08-21 18:57:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 18:57:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-21 18:57:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 18:57:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-21 18:57:32,993 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-21 18:57:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:32,994 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-21 18:57:32,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-21 18:57:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:57:32,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:32,995 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] [2020-08-21 18:57:32,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:57:32,996 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-21 18:57:32,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:32,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849887316] [2020-08-21 18:57:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849887316] [2020-08-21 18:57:33,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011761699] [2020-08-21 18:57:33,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,058 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-21 18:57:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,091 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-21 18:57:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:57:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,094 INFO L225 Difference]: With dead ends: 99 [2020-08-21 18:57:33,094 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 18:57:33,095 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 [2020-08-21 18:57:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 18:57:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-21 18:57:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 18:57:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-21 18:57:33,110 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-21 18:57:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,110 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-21 18:57:33,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-21 18:57:33,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:57:33,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,115 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] [2020-08-21 18:57:33,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:57:33,115 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-21 18:57:33,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118253626] [2020-08-21 18:57:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118253626] [2020-08-21 18:57:33,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60319278] [2020-08-21 18:57:33,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,171 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-21 18:57:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,192 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-21 18:57:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:57:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,195 INFO L225 Difference]: With dead ends: 124 [2020-08-21 18:57:33,195 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 18:57:33,196 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 [2020-08-21 18:57:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 18:57:33,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-21 18:57:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 18:57:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-21 18:57:33,208 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-21 18:57:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,208 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-21 18:57:33,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-21 18:57:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:57:33,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,210 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] [2020-08-21 18:57:33,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:57:33,211 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,211 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-21 18:57:33,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14161672] [2020-08-21 18:57:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14161672] [2020-08-21 18:57:33,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536572665] [2020-08-21 18:57:33,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,287 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-21 18:57:33,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,320 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-21 18:57:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:57:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,323 INFO L225 Difference]: With dead ends: 204 [2020-08-21 18:57:33,323 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 18:57:33,324 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 [2020-08-21 18:57:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 18:57:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-21 18:57:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 18:57:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-21 18:57:33,338 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-21 18:57:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,339 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-21 18:57:33,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-21 18:57:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:57:33,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,341 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] [2020-08-21 18:57:33,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:57:33,341 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-21 18:57:33,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718527111] [2020-08-21 18:57:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718527111] [2020-08-21 18:57:33,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719535918] [2020-08-21 18:57:33,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,383 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-21 18:57:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,403 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-21 18:57:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:57:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,405 INFO L225 Difference]: With dead ends: 183 [2020-08-21 18:57:33,406 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 18:57:33,407 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 [2020-08-21 18:57:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 18:57:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-21 18:57:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 18:57:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-21 18:57:33,421 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-21 18:57:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,422 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-21 18:57:33,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-21 18:57:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:57:33,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,424 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] [2020-08-21 18:57:33,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:57:33,424 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-21 18:57:33,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958962970] [2020-08-21 18:57:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958962970] [2020-08-21 18:57:33,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002816708] [2020-08-21 18:57:33,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,490 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-21 18:57:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,511 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-21 18:57:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:57:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,513 INFO L225 Difference]: With dead ends: 228 [2020-08-21 18:57:33,514 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 18:57:33,514 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 [2020-08-21 18:57:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 18:57:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-21 18:57:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 18:57:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-21 18:57:33,529 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-21 18:57:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,530 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-21 18:57:33,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-21 18:57:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:57:33,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,532 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] [2020-08-21 18:57:33,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:57:33,532 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-21 18:57:33,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253802914] [2020-08-21 18:57:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253802914] [2020-08-21 18:57:33,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529297462] [2020-08-21 18:57:33,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,595 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-21 18:57:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,639 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-21 18:57:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:57:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,643 INFO L225 Difference]: With dead ends: 392 [2020-08-21 18:57:33,643 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 18:57:33,644 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 [2020-08-21 18:57:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 18:57:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-21 18:57:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 18:57:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-21 18:57:33,680 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-21 18:57:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,680 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-21 18:57:33,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-21 18:57:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:33,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,683 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] [2020-08-21 18:57:33,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:57:33,683 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-21 18:57:33,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950749478] [2020-08-21 18:57:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950749478] [2020-08-21 18:57:33,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637512547] [2020-08-21 18:57:33,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,715 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-21 18:57:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,737 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-21 18:57:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,739 INFO L225 Difference]: With dead ends: 348 [2020-08-21 18:57:33,739 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 18:57:33,740 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 [2020-08-21 18:57:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 18:57:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-21 18:57:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-21 18:57:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-21 18:57:33,751 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-21 18:57:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,752 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-21 18:57:33,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-21 18:57:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:33,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,753 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] [2020-08-21 18:57:33,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:57:33,754 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,754 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-21 18:57:33,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481066917] [2020-08-21 18:57:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481066917] [2020-08-21 18:57:33,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133413213] [2020-08-21 18:57:33,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,784 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-21 18:57:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,820 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-21 18:57:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,824 INFO L225 Difference]: With dead ends: 428 [2020-08-21 18:57:33,825 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 18:57:33,825 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 [2020-08-21 18:57:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 18:57:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-21 18:57:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-21 18:57:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-21 18:57:33,838 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-21 18:57:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,838 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-21 18:57:33,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-21 18:57:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:33,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,840 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] [2020-08-21 18:57:33,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:57:33,841 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-21 18:57:33,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457275110] [2020-08-21 18:57:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457275110] [2020-08-21 18:57:33,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559070000] [2020-08-21 18:57:33,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,865 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-21 18:57:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,888 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-21 18:57:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:33,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,891 INFO L225 Difference]: With dead ends: 764 [2020-08-21 18:57:33,891 INFO L226 Difference]: Without dead ends: 450 [2020-08-21 18:57:33,893 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 [2020-08-21 18:57:33,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-21 18:57:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-21 18:57:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-21 18:57:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-21 18:57:33,908 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-21 18:57:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,909 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-21 18:57:33,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-21 18:57:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:33,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:33,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:57:33,911 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-21 18:57:33,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014458454] [2020-08-21 18:57:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:33,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014458454] [2020-08-21 18:57:33,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:33,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:33,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957038598] [2020-08-21 18:57:33,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:33,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:33,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:33,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:33,936 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-21 18:57:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:33,956 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-21 18:57:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:33,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:33,959 INFO L225 Difference]: With dead ends: 672 [2020-08-21 18:57:33,959 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 18:57:33,960 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 [2020-08-21 18:57:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 18:57:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-21 18:57:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 18:57:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-21 18:57:33,974 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-21 18:57:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:33,974 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-21 18:57:33,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-21 18:57:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:33,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,976 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] [2020-08-21 18:57:33,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:57:33,977 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-21 18:57:33,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574896673] [2020-08-21 18:57:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:33,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574896673] [2020-08-21 18:57:34,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525158714] [2020-08-21 18:57:34,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,004 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-21 18:57:34,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,026 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-21 18:57:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:34,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,031 INFO L225 Difference]: With dead ends: 812 [2020-08-21 18:57:34,031 INFO L226 Difference]: Without dead ends: 810 [2020-08-21 18:57:34,032 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 [2020-08-21 18:57:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-21 18:57:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-21 18:57:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-21 18:57:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-21 18:57:34,052 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-21 18:57:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,052 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-21 18:57:34,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-21 18:57:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:34,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,054 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] [2020-08-21 18:57:34,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:57:34,055 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-21 18:57:34,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325042218] [2020-08-21 18:57:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325042218] [2020-08-21 18:57:34,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863294895] [2020-08-21 18:57:34,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,083 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-21 18:57:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,115 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-21 18:57:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:34,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,121 INFO L225 Difference]: With dead ends: 1500 [2020-08-21 18:57:34,121 INFO L226 Difference]: Without dead ends: 874 [2020-08-21 18:57:34,123 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 [2020-08-21 18:57:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-21 18:57:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-21 18:57:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 18:57:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-21 18:57:34,155 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-21 18:57:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,156 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-21 18:57:34,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-21 18:57:34,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:34,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,158 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] [2020-08-21 18:57:34,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:57:34,158 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,159 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-21 18:57:34,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670044097] [2020-08-21 18:57:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670044097] [2020-08-21 18:57:34,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324697453] [2020-08-21 18:57:34,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,186 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-21 18:57:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,215 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-21 18:57:34,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:34,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,220 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 18:57:34,220 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 18:57:34,222 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 [2020-08-21 18:57:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 18:57:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-21 18:57:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-21 18:57:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-21 18:57:34,258 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-21 18:57:34,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,258 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-21 18:57:34,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-21 18:57:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:34,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:34,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:57:34,261 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-21 18:57:34,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66477442] [2020-08-21 18:57:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66477442] [2020-08-21 18:57:34,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708799820] [2020-08-21 18:57:34,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,286 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-21 18:57:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,321 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-21 18:57:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:34,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,329 INFO L225 Difference]: With dead ends: 1548 [2020-08-21 18:57:34,329 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 18:57:34,330 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 [2020-08-21 18:57:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 18:57:34,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-21 18:57:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-21 18:57:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-21 18:57:34,368 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-21 18:57:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,369 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-21 18:57:34,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-21 18:57:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:34,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,372 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] [2020-08-21 18:57:34,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:57:34,372 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-21 18:57:34,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815119735] [2020-08-21 18:57:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815119735] [2020-08-21 18:57:34,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060987022] [2020-08-21 18:57:34,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,401 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-21 18:57:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,443 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-21 18:57:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:34,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,452 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 18:57:34,452 INFO L226 Difference]: Without dead ends: 1706 [2020-08-21 18:57:34,455 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 [2020-08-21 18:57:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-21 18:57:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-21 18:57:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-21 18:57:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-21 18:57:34,505 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-21 18:57:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,505 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-21 18:57:34,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-21 18:57:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:34,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,509 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] [2020-08-21 18:57:34,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:57:34,509 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,510 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-21 18:57:34,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57802034] [2020-08-21 18:57:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57802034] [2020-08-21 18:57:34,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133873517] [2020-08-21 18:57:34,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,532 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-21 18:57:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,575 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-21 18:57:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:34,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,584 INFO L225 Difference]: With dead ends: 2556 [2020-08-21 18:57:34,584 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 18:57:34,586 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 [2020-08-21 18:57:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 18:57:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-21 18:57:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-21 18:57:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-21 18:57:34,640 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-21 18:57:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,640 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-21 18:57:34,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-21 18:57:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:34,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,644 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] [2020-08-21 18:57:34,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 18:57:34,645 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,646 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-21 18:57:34,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690996871] [2020-08-21 18:57:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690996871] [2020-08-21 18:57:34,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090707474] [2020-08-21 18:57:34,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,683 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-21 18:57:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,795 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-21 18:57:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:34,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,811 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 18:57:34,811 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 18:57:34,813 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 [2020-08-21 18:57:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 18:57:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-21 18:57:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-21 18:57:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-21 18:57:34,921 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-21 18:57:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,922 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-21 18:57:34,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-21 18:57:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:34,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,928 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] [2020-08-21 18:57:34,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 18:57:34,929 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-21 18:57:34,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580863733] [2020-08-21 18:57:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:34,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580863733] [2020-08-21 18:57:34,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:34,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436059781] [2020-08-21 18:57:34,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:34,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:34,967 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-21 18:57:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:35,049 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-21 18:57:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:35,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:35,064 INFO L225 Difference]: With dead ends: 5836 [2020-08-21 18:57:35,064 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 18:57:35,069 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 [2020-08-21 18:57:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 18:57:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-21 18:57:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-21 18:57:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-21 18:57:35,171 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-21 18:57:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:35,171 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-21 18:57:35,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-21 18:57:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:35,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:35,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:35,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 18:57:35,179 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:35,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-21 18:57:35,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:35,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18280508] [2020-08-21 18:57:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:35,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18280508] [2020-08-21 18:57:35,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:35,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:35,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858441470] [2020-08-21 18:57:35,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:35,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:35,202 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-21 18:57:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:35,266 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-21 18:57:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:35,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:35,310 INFO L225 Difference]: With dead ends: 5004 [2020-08-21 18:57:35,311 INFO L226 Difference]: Without dead ends: 3402 [2020-08-21 18:57:35,314 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 [2020-08-21 18:57:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-21 18:57:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-21 18:57:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-21 18:57:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-21 18:57:35,411 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-21 18:57:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:35,412 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-21 18:57:35,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-21 18:57:35,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:35,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:35,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:35,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 18:57:35,417 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-21 18:57:35,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:35,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693778385] [2020-08-21 18:57:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:35,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693778385] [2020-08-21 18:57:35,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:35,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:35,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949812407] [2020-08-21 18:57:35,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:35,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:35,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:35,457 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-21 18:57:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:35,574 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-21 18:57:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:35,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:35,633 INFO L225 Difference]: With dead ends: 9804 [2020-08-21 18:57:35,633 INFO L226 Difference]: Without dead ends: 6538 [2020-08-21 18:57:35,643 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 [2020-08-21 18:57:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-21 18:57:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-21 18:57:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 18:57:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-21 18:57:35,850 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-21 18:57:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:35,850 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-21 18:57:35,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-21 18:57:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:35,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:35,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:35,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 18:57:35,861 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:35,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-21 18:57:35,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:35,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929065366] [2020-08-21 18:57:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:35,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929065366] [2020-08-21 18:57:35,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:35,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:35,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423277005] [2020-08-21 18:57:35,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:35,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:35,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:35,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:35,904 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-21 18:57:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:36,083 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-21 18:57:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:36,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:36,101 INFO L225 Difference]: With dead ends: 7052 [2020-08-21 18:57:36,101 INFO L226 Difference]: Without dead ends: 7050 [2020-08-21 18:57:36,104 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 [2020-08-21 18:57:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-21 18:57:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-21 18:57:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 18:57:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-21 18:57:36,286 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-21 18:57:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:36,286 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-21 18:57:36,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-21 18:57:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:57:36,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:36,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:36,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 18:57:36,296 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:36,296 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-21 18:57:36,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:36,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970817362] [2020-08-21 18:57:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:36,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:36,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970817362] [2020-08-21 18:57:36,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:36,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:36,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342747835] [2020-08-21 18:57:36,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:36,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:36,321 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-21 18:57:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:36,589 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-21 18:57:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:36,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:57:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:36,619 INFO L225 Difference]: With dead ends: 10634 [2020-08-21 18:57:36,619 INFO L226 Difference]: Without dead ends: 10632 [2020-08-21 18:57:36,623 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 [2020-08-21 18:57:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-21 18:57:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-21 18:57:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-21 18:57:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-21 18:57:36,956 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-21 18:57:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:36,956 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-21 18:57:36,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-21 18:57:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:57:36,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:36,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:36,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 18:57:36,982 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-21 18:57:36,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:36,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981013747] [2020-08-21 18:57:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:57:37,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981013747] [2020-08-21 18:57:37,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:37,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:37,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009211358] [2020-08-21 18:57:37,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:37,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:37,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:37,020 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-21 18:57:37,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:37,340 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-21 18:57:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:37,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:57:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:37,341 INFO L225 Difference]: With dead ends: 22664 [2020-08-21 18:57:37,341 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:57:37,395 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 [2020-08-21 18:57:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:57:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:57:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:57:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:57:37,397 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 18:57:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:37,397 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:57:37,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:57:37,398 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:57:37,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 18:57:37,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:57:37,434 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:57:37,434 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:57:37,434 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:57:37,434 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:57:37,435 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:57:37,435 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:57:37,435 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,435 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-21 18:57:37,436 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,436 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-21 18:57:37,436 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,436 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-21 18:57:37,436 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,437 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-21 18:57:37,437 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,438 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,438 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-21 18:57:37,439 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-21 18:57:37,439 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-21 18:57:37,439 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,439 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 18:57:37,440 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,440 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-21 18:57:37,440 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-21 18:57:37,440 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-21 18:57:37,441 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-21 18:57:37,441 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,441 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,441 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,442 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-21 18:57:37,442 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,442 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,442 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 18:57:37,442 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-21 18:57:37,443 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-21 18:57:37,443 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,443 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,443 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 18:57:37,444 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-21 18:57:37,444 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,444 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:57:37,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:57:37 BoogieIcfgContainer [2020-08-21 18:57:37,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:57:37,468 INFO L168 Benchmark]: Toolchain (without parser) took 5929.23 ms. Allocated memory was 141.0 MB in the beginning and 337.6 MB in the end (delta: 196.6 MB). Free memory was 104.3 MB in the beginning and 97.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 203.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:37,469 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:57:37,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.22 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 93.5 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:37,473 INFO L168 Benchmark]: Boogie Preprocessor took 141.18 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 93.5 MB in the beginning and 182.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:37,476 INFO L168 Benchmark]: RCFGBuilder took 445.64 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 164.4 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:37,484 INFO L168 Benchmark]: TraceAbstraction took 5050.58 ms. Allocated memory was 205.0 MB in the beginning and 337.6 MB in the end (delta: 132.6 MB). Free memory was 163.8 MB in the beginning and 97.8 MB in the end (delta: 66.0 MB). Peak memory consumption was 198.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:37,487 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.22 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 93.5 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.18 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 93.5 MB in the beginning and 182.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 445.64 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 164.4 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5050.58 ms. Allocated memory was 205.0 MB in the beginning and 337.6 MB in the end (delta: 132.6 MB). Free memory was 163.8 MB in the beginning and 97.8 MB in the end (delta: 66.0 MB). Peak memory consumption was 198.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.9s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...