/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:46:39,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:46:39,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:46:39,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:46:39,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:46:39,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:46:39,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:46:39,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:46:39,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:46:39,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:46:39,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:46:39,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:46:39,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:46:39,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:46:39,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:46:39,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:46:39,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:46:39,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:46:39,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:46:39,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:46:39,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:46:39,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:46:39,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:46:39,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:46:39,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:46:39,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:46:39,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:46:39,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:46:39,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 02:46:39,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:46:39,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:46:39,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:46:39,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:46:39,417 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:46:39,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:46:39,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:46:39,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:46:39,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:46:39,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:46:39,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:46:39,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:46:39,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:46:39,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:46:39,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:46:39,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:46:39,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:46:39,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:46:39,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:46:39,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:46:39,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:46:39,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:46:39,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:46:39,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:46:39,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:46:39,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:46:39,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:46:39,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:46:39,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:46:39,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:46:39,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:46:39,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:46:39,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:46:39,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:46:39,728 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:46:39,729 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-19 02:46:39,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efb8ac0a7/74da59d4fbd3478d971c3aaa8fb9755f/FLAGe58cd8228 [2020-08-19 02:46:40,297 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:46:40,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-19 02:46:40,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efb8ac0a7/74da59d4fbd3478d971c3aaa8fb9755f/FLAGe58cd8228 [2020-08-19 02:46:40,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efb8ac0a7/74da59d4fbd3478d971c3aaa8fb9755f [2020-08-19 02:46:40,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:46:40,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:46:40,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:46:40,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:46:40,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:46:40,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:40,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337988d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40, skipping insertion in model container [2020-08-19 02:46:40,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:40,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:46:40,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:46:40,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:46:40,902 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:46:40,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:46:40,965 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:46:40,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40 WrapperNode [2020-08-19 02:46:40,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:46:40,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:46:40,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:46:40,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:46:41,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:41,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:41,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:41,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:41,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:41,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:41,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (1/1) ... [2020-08-19 02:46:41,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:46:41,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:46:41,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:46:41,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:46:41,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:46:41,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:46:41,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:46:41,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:46:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:46:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:46:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:46:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:46:41,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:46:41,429 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:46:41,429 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 02:46:41,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:46:41 BoogieIcfgContainer [2020-08-19 02:46:41,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:46:41,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:46:41,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:46:41,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:46:41,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:46:40" (1/3) ... [2020-08-19 02:46:41,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfd3d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:46:41, skipping insertion in model container [2020-08-19 02:46:41,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:40" (2/3) ... [2020-08-19 02:46:41,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfd3d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:46:41, skipping insertion in model container [2020-08-19 02:46:41,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:46:41" (3/3) ... [2020-08-19 02:46:41,444 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-19 02:46:41,455 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:46:41,464 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:46:41,482 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:46:41,517 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:46:41,517 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:46:41,517 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:46:41,518 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:46:41,518 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:46:41,519 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:46:41,519 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:46:41,519 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:46:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-19 02:46:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 02:46:41,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:41,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:41,561 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-19 02:46:41,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:41,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003222383] [2020-08-19 02:46:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:41,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:41,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003222383] [2020-08-19 02:46:41,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:41,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:41,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33640358] [2020-08-19 02:46:41,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:41,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:41,836 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-19 02:46:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:41,912 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-19 02:46:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:41,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 02:46:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:41,929 INFO L225 Difference]: With dead ends: 75 [2020-08-19 02:46:41,930 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 02:46:41,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 02:46:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-19 02:46:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 02:46:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-19 02:46:41,981 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-19 02:46:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:41,981 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-19 02:46:41,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-19 02:46:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 02:46:41,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:41,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:41,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:46:41,984 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:41,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-19 02:46:41,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:41,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518277831] [2020-08-19 02:46:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518277831] [2020-08-19 02:46:42,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910671188] [2020-08-19 02:46:42,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,052 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-19 02:46:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,078 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-19 02:46:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 02:46:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,081 INFO L225 Difference]: With dead ends: 97 [2020-08-19 02:46:42,081 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 02:46:42,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 02:46:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-19 02:46:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 02:46:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-19 02:46:42,094 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-19 02:46:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,095 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-19 02:46:42,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-19 02:46:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:46:42,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:46:42,097 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-19 02:46:42,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275184559] [2020-08-19 02:46:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275184559] [2020-08-19 02:46:42,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636084020] [2020-08-19 02:46:42,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,178 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-19 02:46:42,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,219 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-19 02:46:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 02:46:42,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,222 INFO L225 Difference]: With dead ends: 90 [2020-08-19 02:46:42,222 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 02:46:42,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 02:46:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-19 02:46:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 02:46:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-19 02:46:42,235 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-19 02:46:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,235 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-19 02:46:42,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-19 02:46:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:46:42,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:46:42,238 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-19 02:46:42,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312305451] [2020-08-19 02:46:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312305451] [2020-08-19 02:46:42,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979774679] [2020-08-19 02:46:42,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,325 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-19 02:46:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,365 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-19 02:46:42,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 02:46:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,367 INFO L225 Difference]: With dead ends: 112 [2020-08-19 02:46:42,368 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 02:46:42,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 02:46:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-19 02:46:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-19 02:46:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-19 02:46:42,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-19 02:46:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,380 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-19 02:46:42,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-19 02:46:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:46:42,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:46:42,382 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-19 02:46:42,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904668563] [2020-08-19 02:46:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904668563] [2020-08-19 02:46:42,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491751624] [2020-08-19 02:46:42,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,427 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-19 02:46:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,462 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-19 02:46:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 02:46:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,465 INFO L225 Difference]: With dead ends: 184 [2020-08-19 02:46:42,466 INFO L226 Difference]: Without dead ends: 112 [2020-08-19 02:46:42,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-19 02:46:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-19 02:46:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-19 02:46:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-19 02:46:42,497 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-19 02:46:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,497 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-19 02:46:42,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-19 02:46:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 02:46:42,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:46:42,500 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-19 02:46:42,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522782061] [2020-08-19 02:46:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522782061] [2020-08-19 02:46:42,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139883288] [2020-08-19 02:46:42,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,583 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-19 02:46:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,608 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-19 02:46:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 02:46:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,612 INFO L225 Difference]: With dead ends: 165 [2020-08-19 02:46:42,612 INFO L226 Difference]: Without dead ends: 114 [2020-08-19 02:46:42,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-19 02:46:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-19 02:46:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-19 02:46:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-19 02:46:42,625 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-19 02:46:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,625 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-19 02:46:42,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-19 02:46:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 02:46:42,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:46:42,627 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,628 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-19 02:46:42,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472595204] [2020-08-19 02:46:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472595204] [2020-08-19 02:46:42,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949357555] [2020-08-19 02:46:42,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,665 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-19 02:46:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,683 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-19 02:46:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 02:46:42,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,685 INFO L225 Difference]: With dead ends: 204 [2020-08-19 02:46:42,685 INFO L226 Difference]: Without dead ends: 202 [2020-08-19 02:46:42,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-19 02:46:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-19 02:46:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-19 02:46:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-19 02:46:42,710 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-19 02:46:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,710 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-19 02:46:42,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-19 02:46:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 02:46:42,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:46:42,712 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-19 02:46:42,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527738819] [2020-08-19 02:46:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527738819] [2020-08-19 02:46:42,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352726939] [2020-08-19 02:46:42,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,741 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-19 02:46:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,764 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-19 02:46:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 02:46:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,767 INFO L225 Difference]: With dead ends: 352 [2020-08-19 02:46:42,767 INFO L226 Difference]: Without dead ends: 210 [2020-08-19 02:46:42,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-19 02:46:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-19 02:46:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-19 02:46:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-19 02:46:42,783 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-19 02:46:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,783 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-19 02:46:42,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-19 02:46:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 02:46:42,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:46:42,786 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,786 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-19 02:46:42,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778283619] [2020-08-19 02:46:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778283619] [2020-08-19 02:46:42,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480576491] [2020-08-19 02:46:42,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,821 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-19 02:46:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,845 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-19 02:46:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 02:46:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,848 INFO L225 Difference]: With dead ends: 312 [2020-08-19 02:46:42,848 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 02:46:42,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 02:46:42,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-19 02:46:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-19 02:46:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-19 02:46:42,862 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-19 02:46:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,862 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-19 02:46:42,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-19 02:46:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 02:46:42,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:46:42,864 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,865 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-19 02:46:42,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058348219] [2020-08-19 02:46:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058348219] [2020-08-19 02:46:42,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420617735] [2020-08-19 02:46:42,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,891 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-19 02:46:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,911 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-19 02:46:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 02:46:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,915 INFO L225 Difference]: With dead ends: 380 [2020-08-19 02:46:42,915 INFO L226 Difference]: Without dead ends: 378 [2020-08-19 02:46:42,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-19 02:46:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-19 02:46:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-19 02:46:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-19 02:46:42,929 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-19 02:46:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,929 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-19 02:46:42,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-19 02:46:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 02:46:42,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:42,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:42,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:46:42,932 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:42,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:42,933 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-19 02:46:42,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:42,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149636951] [2020-08-19 02:46:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:42,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149636951] [2020-08-19 02:46:42,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:42,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:42,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328359676] [2020-08-19 02:46:42,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:42,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:42,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,961 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-19 02:46:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,984 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-19 02:46:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 02:46:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,987 INFO L225 Difference]: With dead ends: 684 [2020-08-19 02:46:42,987 INFO L226 Difference]: Without dead ends: 402 [2020-08-19 02:46:42,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-19 02:46:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-19 02:46:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-19 02:46:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-19 02:46:43,018 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-19 02:46:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:43,018 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-19 02:46:43,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-19 02:46:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:46:43,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:46:43,024 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-19 02:46:43,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850647742] [2020-08-19 02:46:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:43,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850647742] [2020-08-19 02:46:43,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95207962] [2020-08-19 02:46:43,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,078 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-19 02:46:43,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,099 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-19 02:46:43,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 02:46:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:43,102 INFO L225 Difference]: With dead ends: 600 [2020-08-19 02:46:43,102 INFO L226 Difference]: Without dead ends: 410 [2020-08-19 02:46:43,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-19 02:46:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-19 02:46:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-19 02:46:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-19 02:46:43,117 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-19 02:46:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:43,117 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-19 02:46:43,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-19 02:46:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:46:43,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:46:43,119 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-19 02:46:43,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771712204] [2020-08-19 02:46:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:43,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771712204] [2020-08-19 02:46:43,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445936360] [2020-08-19 02:46:43,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,154 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-19 02:46:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,176 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-19 02:46:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 02:46:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:43,181 INFO L225 Difference]: With dead ends: 716 [2020-08-19 02:46:43,181 INFO L226 Difference]: Without dead ends: 714 [2020-08-19 02:46:43,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-19 02:46:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-19 02:46:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-19 02:46:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-19 02:46:43,200 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-19 02:46:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:43,201 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-19 02:46:43,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-19 02:46:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:46:43,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:46:43,203 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,204 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-19 02:46:43,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275845015] [2020-08-19 02:46:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:43,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275845015] [2020-08-19 02:46:43,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715190107] [2020-08-19 02:46:43,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,230 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-19 02:46:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,257 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-19 02:46:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 02:46:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:43,262 INFO L225 Difference]: With dead ends: 1340 [2020-08-19 02:46:43,262 INFO L226 Difference]: Without dead ends: 778 [2020-08-19 02:46:43,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-19 02:46:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-19 02:46:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 02:46:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-19 02:46:43,289 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-19 02:46:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:43,290 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-19 02:46:43,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-19 02:46:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 02:46:43,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:46:43,293 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-19 02:46:43,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123139609] [2020-08-19 02:46:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:43,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123139609] [2020-08-19 02:46:43,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715800863] [2020-08-19 02:46:43,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,320 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-19 02:46:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,348 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-19 02:46:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 02:46:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:43,354 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 02:46:43,354 INFO L226 Difference]: Without dead ends: 794 [2020-08-19 02:46:43,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-19 02:46:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-19 02:46:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-19 02:46:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-19 02:46:43,388 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-19 02:46:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:43,388 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-19 02:46:43,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-19 02:46:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 02:46:43,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 02:46:43,391 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-19 02:46:43,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309009949] [2020-08-19 02:46:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:43,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309009949] [2020-08-19 02:46:43,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666417677] [2020-08-19 02:46:43,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,436 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-19 02:46:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,483 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-19 02:46:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 02:46:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:43,491 INFO L225 Difference]: With dead ends: 1356 [2020-08-19 02:46:43,492 INFO L226 Difference]: Without dead ends: 1354 [2020-08-19 02:46:43,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-19 02:46:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-19 02:46:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-19 02:46:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-19 02:46:43,544 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-19 02:46:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:43,544 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-19 02:46:43,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-19 02:46:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 02:46:43,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 02:46:43,548 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-19 02:46:43,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493248672] [2020-08-19 02:46:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:43,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493248672] [2020-08-19 02:46:43,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008050769] [2020-08-19 02:46:43,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,579 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-19 02:46:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,623 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-19 02:46:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 02:46:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:43,630 INFO L225 Difference]: With dead ends: 2636 [2020-08-19 02:46:43,631 INFO L226 Difference]: Without dead ends: 1514 [2020-08-19 02:46:43,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-19 02:46:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-19 02:46:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-19 02:46:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-19 02:46:43,686 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-19 02:46:43,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:43,688 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-19 02:46:43,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:43,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-19 02:46:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 02:46:43,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 02:46:43,692 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-19 02:46:43,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351410831] [2020-08-19 02:46:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:43,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351410831] [2020-08-19 02:46:43,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417094486] [2020-08-19 02:46:43,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,722 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-19 02:46:43,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,779 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-19 02:46:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,780 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 02:46:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:43,790 INFO L225 Difference]: With dead ends: 2268 [2020-08-19 02:46:43,791 INFO L226 Difference]: Without dead ends: 1546 [2020-08-19 02:46:43,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-19 02:46:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-19 02:46:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 02:46:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-19 02:46:43,864 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-19 02:46:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:43,864 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-19 02:46:43,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-19 02:46:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 02:46:43,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 02:46:43,868 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-19 02:46:43,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103698760] [2020-08-19 02:46:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:43,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103698760] [2020-08-19 02:46:43,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686293495] [2020-08-19 02:46:43,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,913 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-19 02:46:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,989 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-19 02:46:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 02:46:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:44,005 INFO L225 Difference]: With dead ends: 2572 [2020-08-19 02:46:44,006 INFO L226 Difference]: Without dead ends: 2570 [2020-08-19 02:46:44,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-19 02:46:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-19 02:46:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-19 02:46:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-19 02:46:44,111 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-19 02:46:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:44,111 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-19 02:46:44,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-19 02:46:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 02:46:44,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:44,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:44,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 02:46:44,119 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-19 02:46:44,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:44,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426493004] [2020-08-19 02:46:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:44,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426493004] [2020-08-19 02:46:44,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:44,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:44,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711410568] [2020-08-19 02:46:44,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:44,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:44,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,160 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-19 02:46:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:44,270 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-19 02:46:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:44,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 02:46:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:44,286 INFO L225 Difference]: With dead ends: 5196 [2020-08-19 02:46:44,286 INFO L226 Difference]: Without dead ends: 2954 [2020-08-19 02:46:44,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-19 02:46:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-19 02:46:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-19 02:46:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-19 02:46:44,383 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-19 02:46:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:44,384 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-19 02:46:44,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-19 02:46:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:46:44,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:44,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:44,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 02:46:44,393 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-19 02:46:44,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:44,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114153919] [2020-08-19 02:46:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:44,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114153919] [2020-08-19 02:46:44,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:44,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:44,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092372148] [2020-08-19 02:46:44,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:44,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:44,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,421 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-19 02:46:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:44,482 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-19 02:46:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:44,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 02:46:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:44,496 INFO L225 Difference]: With dead ends: 4428 [2020-08-19 02:46:44,496 INFO L226 Difference]: Without dead ends: 3018 [2020-08-19 02:46:44,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-19 02:46:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-19 02:46:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-19 02:46:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-19 02:46:44,593 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-19 02:46:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:44,594 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-19 02:46:44,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-19 02:46:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:46:44,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:44,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:44,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 02:46:44,599 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:44,599 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-19 02:46:44,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:44,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910932218] [2020-08-19 02:46:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:44,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910932218] [2020-08-19 02:46:44,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:44,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:44,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366930793] [2020-08-19 02:46:44,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:44,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,625 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-19 02:46:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:44,744 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-19 02:46:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:44,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 02:46:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:44,756 INFO L225 Difference]: With dead ends: 8650 [2020-08-19 02:46:44,757 INFO L226 Difference]: Without dead ends: 3016 [2020-08-19 02:46:44,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-19 02:46:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-19 02:46:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-19 02:46:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-19 02:46:44,859 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-19 02:46:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:44,860 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-19 02:46:44,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-19 02:46:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:46:44,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:44,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:44,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 02:46:44,872 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:44,872 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-19 02:46:44,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:44,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840575183] [2020-08-19 02:46:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:44,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840575183] [2020-08-19 02:46:44,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:44,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:44,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911899339] [2020-08-19 02:46:44,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:44,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:44,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:44,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,901 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-19 02:46:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:44,944 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-19 02:46:44,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:44,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 02:46:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:44,945 INFO L225 Difference]: With dead ends: 3016 [2020-08-19 02:46:44,945 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:46:44,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:46:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:46:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:46:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:46:44,951 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-19 02:46:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:44,951 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:46:44,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:46:44,951 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:46:44,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 02:46:44,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:46:44,977 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 02:46:44,978 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:46:44,978 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:46:44,978 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:46:44,978 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:46:44,978 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:46:44,978 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-19 02:46:44,978 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-19 02:46:44,979 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,979 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-19 02:46:44,979 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,980 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-19 02:46:44,980 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,980 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,980 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-19 02:46:44,980 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-19 02:46:44,980 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-19 02:46:44,981 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-19 02:46:44,981 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-19 02:46:44,982 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,982 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,982 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,982 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,982 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-19 02:46:44,982 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,982 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-19 02:46:44,982 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-19 02:46:44,983 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,983 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,983 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-19 02:46:44,983 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-19 02:46:44,983 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,983 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-19 02:46:44,983 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,983 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,983 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-19 02:46:44,984 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-19 02:46:44,984 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 02:46:44,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:46:44 BoogieIcfgContainer [2020-08-19 02:46:44,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:46:45,001 INFO L168 Benchmark]: Toolchain (without parser) took 4333.23 ms. Allocated memory was 140.0 MB in the beginning and 287.8 MB in the end (delta: 147.8 MB). Free memory was 102.5 MB in the beginning and 175.3 MB in the end (delta: -72.8 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:45,002 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:46:45,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.85 ms. Allocated memory is still 140.0 MB. Free memory was 102.2 MB in the beginning and 91.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:45,003 INFO L168 Benchmark]: Boogie Preprocessor took 120.08 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:45,004 INFO L168 Benchmark]: RCFGBuilder took 348.31 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 162.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:45,006 INFO L168 Benchmark]: TraceAbstraction took 3562.44 ms. Allocated memory was 202.9 MB in the beginning and 287.8 MB in the end (delta: 84.9 MB). Free memory was 162.6 MB in the beginning and 175.3 MB in the end (delta: -12.6 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:45,015 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.85 ms. Allocated memory is still 140.0 MB. Free memory was 102.2 MB in the beginning and 91.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.08 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.31 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 162.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3562.44 ms. Allocated memory was 202.9 MB in the beginning and 287.8 MB in the end (delta: 84.9 MB). Free memory was 162.6 MB in the beginning and 175.3 MB in the end (delta: -12.6 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...