/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:49:14,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:49:14,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:49:14,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:49:14,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:49:14,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:49:14,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:49:14,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:49:14,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:49:14,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:49:14,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:49:14,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:49:14,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:49:14,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:49:14,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:49:14,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:49:14,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:49:14,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:49:14,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:49:14,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:49:14,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:49:14,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:49:14,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:49:14,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:49:14,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:49:14,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:49:14,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:49:14,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:49:14,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:49:14,352 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:49:14,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:49:14,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:49:14,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:49:14,354 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:49:14,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:49:14,355 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:49:14,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:49:14,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:49:14,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:49:14,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:49:14,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:49:14,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:49:14,357 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:49:14,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:49:14,358 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:49:14,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:49:14,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:49:14,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:49:14,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:49:14,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:49:14,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:49:14,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:49:14,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:49:14,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:49:14,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:49:14,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:49:14,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:49:14,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:49:14,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:49:14,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:49:14,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:49:14,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:49:14,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:49:14,713 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:49:14,713 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-19 06:49:14,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c69c0db1c/8af3c1e335554c74822f3e63b7ec9cd2/FLAG7f5bb4f40 [2020-08-19 06:49:15,294 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:49:15,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-19 06:49:15,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c69c0db1c/8af3c1e335554c74822f3e63b7ec9cd2/FLAG7f5bb4f40 [2020-08-19 06:49:15,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c69c0db1c/8af3c1e335554c74822f3e63b7ec9cd2 [2020-08-19 06:49:15,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:49:15,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:49:15,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:15,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:49:15,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:49:15,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:15,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef001ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15, skipping insertion in model container [2020-08-19 06:49:15,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:15,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:49:15,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:49:15,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:15,894 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:49:15,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:15,931 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:49:15,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15 WrapperNode [2020-08-19 06:49:15,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:15,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:49:15,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:49:15,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:49:16,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:16,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:16,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:16,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:16,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:16,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:16,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (1/1) ... [2020-08-19 06:49:16,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:49:16,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:49:16,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:49:16,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:49:16,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:49:16,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:49:16,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:49:16,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:49:16,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:49:16,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:49:16,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:49:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:49:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:49:16,381 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:49:16,382 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:49:16,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:16 BoogieIcfgContainer [2020-08-19 06:49:16,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:49:16,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:49:16,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:49:16,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:49:16,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:49:15" (1/3) ... [2020-08-19 06:49:16,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d2a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:16, skipping insertion in model container [2020-08-19 06:49:16,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:15" (2/3) ... [2020-08-19 06:49:16,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d2a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:16, skipping insertion in model container [2020-08-19 06:49:16,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:16" (3/3) ... [2020-08-19 06:49:16,396 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-19 06:49:16,413 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:49:16,437 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:49:16,479 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:49:16,526 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:49:16,527 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:49:16,527 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:49:16,527 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:49:16,527 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:49:16,527 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:49:16,527 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:49:16,528 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:49:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-19 06:49:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:49:16,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:16,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:16,555 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:16,562 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-19 06:49:16,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:16,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132394222] [2020-08-19 06:49:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:16,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:16,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132394222] [2020-08-19 06:49:16,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:16,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:16,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077276562] [2020-08-19 06:49:16,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:16,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:16,807 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-19 06:49:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:16,876 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-19 06:49:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:16,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:49:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:16,891 INFO L225 Difference]: With dead ends: 75 [2020-08-19 06:49:16,891 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 06:49:16,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 06:49:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-19 06:49:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 06:49:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-19 06:49:16,945 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-19 06:49:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:16,946 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-19 06:49:16,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-19 06:49:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:49:16,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:16,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:16,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:49:16,951 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:16,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:16,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-19 06:49:16,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:16,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114048576] [2020-08-19 06:49:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114048576] [2020-08-19 06:49:17,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059749702] [2020-08-19 06:49:17,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,030 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-19 06:49:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,089 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-19 06:49:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:49:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,092 INFO L225 Difference]: With dead ends: 97 [2020-08-19 06:49:17,093 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 06:49:17,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 06:49:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-19 06:49:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 06:49:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-19 06:49:17,112 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-19 06:49:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,113 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-19 06:49:17,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-19 06:49:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:49:17,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:49:17,115 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-19 06:49:17,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863806359] [2020-08-19 06:49:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863806359] [2020-08-19 06:49:17,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979935686] [2020-08-19 06:49:17,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,184 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-19 06:49:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,210 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-19 06:49:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:49:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,212 INFO L225 Difference]: With dead ends: 90 [2020-08-19 06:49:17,212 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 06:49:17,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 06:49:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-19 06:49:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 06:49:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-19 06:49:17,223 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-19 06:49:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,223 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-19 06:49:17,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-19 06:49:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:49:17,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:49:17,226 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-19 06:49:17,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923395064] [2020-08-19 06:49:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923395064] [2020-08-19 06:49:17,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461347472] [2020-08-19 06:49:17,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,276 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-19 06:49:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,327 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-19 06:49:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:49:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,330 INFO L225 Difference]: With dead ends: 112 [2020-08-19 06:49:17,330 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 06:49:17,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 06:49:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-19 06:49:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-19 06:49:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-19 06:49:17,342 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-19 06:49:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,342 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-19 06:49:17,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-19 06:49:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:49:17,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:49:17,344 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-19 06:49:17,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801187293] [2020-08-19 06:49:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801187293] [2020-08-19 06:49:17,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970706808] [2020-08-19 06:49:17,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,386 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-19 06:49:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,407 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-19 06:49:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:49:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,410 INFO L225 Difference]: With dead ends: 184 [2020-08-19 06:49:17,410 INFO L226 Difference]: Without dead ends: 112 [2020-08-19 06:49:17,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-19 06:49:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-19 06:49:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-19 06:49:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-19 06:49:17,424 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-19 06:49:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,425 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-19 06:49:17,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-19 06:49:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:49:17,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:49:17,427 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,428 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-19 06:49:17,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614678465] [2020-08-19 06:49:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614678465] [2020-08-19 06:49:17,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278438921] [2020-08-19 06:49:17,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,483 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-19 06:49:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,521 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-19 06:49:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:49:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,525 INFO L225 Difference]: With dead ends: 165 [2020-08-19 06:49:17,525 INFO L226 Difference]: Without dead ends: 114 [2020-08-19 06:49:17,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-19 06:49:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-19 06:49:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-19 06:49:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-19 06:49:17,552 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-19 06:49:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,554 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-19 06:49:17,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-19 06:49:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:49:17,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:49:17,557 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-19 06:49:17,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245535184] [2020-08-19 06:49:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245535184] [2020-08-19 06:49:17,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139987702] [2020-08-19 06:49:17,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,623 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-19 06:49:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,645 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-19 06:49:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:49:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,648 INFO L225 Difference]: With dead ends: 204 [2020-08-19 06:49:17,648 INFO L226 Difference]: Without dead ends: 202 [2020-08-19 06:49:17,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-19 06:49:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-19 06:49:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-19 06:49:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-19 06:49:17,677 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-19 06:49:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,678 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-19 06:49:17,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-19 06:49:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:49:17,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:49:17,680 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-19 06:49:17,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080926697] [2020-08-19 06:49:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080926697] [2020-08-19 06:49:17,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921307733] [2020-08-19 06:49:17,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,716 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-19 06:49:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,737 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-19 06:49:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 06:49:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,740 INFO L225 Difference]: With dead ends: 352 [2020-08-19 06:49:17,740 INFO L226 Difference]: Without dead ends: 210 [2020-08-19 06:49:17,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-19 06:49:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-19 06:49:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-19 06:49:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-19 06:49:17,756 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-19 06:49:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,756 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-19 06:49:17,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-19 06:49:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:49:17,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:49:17,759 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-19 06:49:17,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209520283] [2020-08-19 06:49:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209520283] [2020-08-19 06:49:17,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342491492] [2020-08-19 06:49:17,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,795 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-19 06:49:17,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,813 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-19 06:49:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:49:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,816 INFO L225 Difference]: With dead ends: 312 [2020-08-19 06:49:17,816 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 06:49:17,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 06:49:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-19 06:49:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-19 06:49:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-19 06:49:17,829 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-19 06:49:17,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,829 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-19 06:49:17,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-19 06:49:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:49:17,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:49:17,832 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-19 06:49:17,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679562539] [2020-08-19 06:49:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679562539] [2020-08-19 06:49:17,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486999294] [2020-08-19 06:49:17,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,860 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-19 06:49:17,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,882 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-19 06:49:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:49:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,885 INFO L225 Difference]: With dead ends: 380 [2020-08-19 06:49:17,886 INFO L226 Difference]: Without dead ends: 378 [2020-08-19 06:49:17,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-19 06:49:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-19 06:49:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-19 06:49:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-19 06:49:17,900 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-19 06:49:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,900 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-19 06:49:17,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-19 06:49:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:49:17,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:49:17,904 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-19 06:49:17,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252999209] [2020-08-19 06:49:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:17,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252999209] [2020-08-19 06:49:17,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:17,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:17,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787561845] [2020-08-19 06:49:17,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:17,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:17,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:17,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,936 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-19 06:49:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,960 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-19 06:49:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:49:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,964 INFO L225 Difference]: With dead ends: 684 [2020-08-19 06:49:17,964 INFO L226 Difference]: Without dead ends: 402 [2020-08-19 06:49:17,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-19 06:49:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-19 06:49:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-19 06:49:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-19 06:49:17,990 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-19 06:49:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:17,991 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-19 06:49:17,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-19 06:49:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:17,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:17,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:17,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:49:17,995 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:17,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:17,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-19 06:49:17,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:17,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933584824] [2020-08-19 06:49:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933584824] [2020-08-19 06:49:18,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271482640] [2020-08-19 06:49:18,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,055 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-19 06:49:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,077 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-19 06:49:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,081 INFO L225 Difference]: With dead ends: 600 [2020-08-19 06:49:18,081 INFO L226 Difference]: Without dead ends: 410 [2020-08-19 06:49:18,082 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 06:49:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-19 06:49:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-19 06:49:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-19 06:49:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-19 06:49:18,096 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-19 06:49:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:18,097 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-19 06:49:18,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-19 06:49:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:18,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:18,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:18,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:49:18,099 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:18,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-19 06:49:18,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:18,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948735002] [2020-08-19 06:49:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948735002] [2020-08-19 06:49:18,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687521090] [2020-08-19 06:49:18,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,124 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-19 06:49:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,147 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-19 06:49:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,151 INFO L225 Difference]: With dead ends: 716 [2020-08-19 06:49:18,152 INFO L226 Difference]: Without dead ends: 714 [2020-08-19 06:49:18,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-19 06:49:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-19 06:49:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-19 06:49:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-19 06:49:18,172 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-19 06:49:18,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:18,173 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-19 06:49:18,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-19 06:49:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:18,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:18,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:18,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:49:18,175 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-19 06:49:18,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:18,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68065195] [2020-08-19 06:49:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68065195] [2020-08-19 06:49:18,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651622335] [2020-08-19 06:49:18,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,201 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-19 06:49:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,229 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-19 06:49:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,234 INFO L225 Difference]: With dead ends: 1340 [2020-08-19 06:49:18,234 INFO L226 Difference]: Without dead ends: 778 [2020-08-19 06:49:18,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-19 06:49:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-19 06:49:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 06:49:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-19 06:49:18,261 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-19 06:49:18,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:18,262 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-19 06:49:18,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-19 06:49:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:18,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:18,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:18,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:49:18,265 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:18,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-19 06:49:18,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:18,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806604180] [2020-08-19 06:49:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806604180] [2020-08-19 06:49:18,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389439699] [2020-08-19 06:49:18,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,291 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-19 06:49:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,327 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-19 06:49:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,332 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 06:49:18,333 INFO L226 Difference]: Without dead ends: 794 [2020-08-19 06:49:18,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-19 06:49:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-19 06:49:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-19 06:49:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-19 06:49:18,366 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-19 06:49:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:18,366 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-19 06:49:18,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-19 06:49:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:18,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:18,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:18,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:49:18,369 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-19 06:49:18,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:18,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191825113] [2020-08-19 06:49:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191825113] [2020-08-19 06:49:18,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657964278] [2020-08-19 06:49:18,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,407 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-19 06:49:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,446 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-19 06:49:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,454 INFO L225 Difference]: With dead ends: 1356 [2020-08-19 06:49:18,455 INFO L226 Difference]: Without dead ends: 1354 [2020-08-19 06:49:18,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-19 06:49:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-19 06:49:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-19 06:49:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-19 06:49:18,503 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-19 06:49:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:18,503 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-19 06:49:18,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-19 06:49:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:18,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:18,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:18,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:49:18,507 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:18,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-19 06:49:18,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:18,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160988502] [2020-08-19 06:49:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160988502] [2020-08-19 06:49:18,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309630088] [2020-08-19 06:49:18,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,546 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-19 06:49:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,592 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-19 06:49:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,600 INFO L225 Difference]: With dead ends: 2636 [2020-08-19 06:49:18,601 INFO L226 Difference]: Without dead ends: 1514 [2020-08-19 06:49:18,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-19 06:49:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-19 06:49:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-19 06:49:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-19 06:49:18,652 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-19 06:49:18,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:18,653 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-19 06:49:18,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-19 06:49:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:18,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:18,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:18,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:49:18,657 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:18,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-19 06:49:18,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:18,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196410445] [2020-08-19 06:49:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196410445] [2020-08-19 06:49:18,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697628530] [2020-08-19 06:49:18,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,684 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-19 06:49:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,728 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-19 06:49:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,736 INFO L225 Difference]: With dead ends: 2268 [2020-08-19 06:49:18,737 INFO L226 Difference]: Without dead ends: 1546 [2020-08-19 06:49:18,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-19 06:49:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-19 06:49:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 06:49:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-19 06:49:18,791 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-19 06:49:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:18,791 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-19 06:49:18,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-19 06:49:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:18,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:18,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:18,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:49:18,794 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-19 06:49:18,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:18,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000297130] [2020-08-19 06:49:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000297130] [2020-08-19 06:49:18,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126131868] [2020-08-19 06:49:18,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,825 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-19 06:49:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,900 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-19 06:49:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,917 INFO L225 Difference]: With dead ends: 2572 [2020-08-19 06:49:18,917 INFO L226 Difference]: Without dead ends: 2570 [2020-08-19 06:49:18,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-19 06:49:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-19 06:49:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-19 06:49:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-19 06:49:19,015 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-19 06:49:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:19,016 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-19 06:49:19,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-19 06:49:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:19,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:19,022 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, 1, 1] [2020-08-19 06:49:19,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:49:19,022 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:19,023 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-19 06:49:19,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:19,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978404931] [2020-08-19 06:49:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:19,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978404931] [2020-08-19 06:49:19,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:19,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:19,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123638689] [2020-08-19 06:49:19,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:19,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:19,069 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-19 06:49:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:19,193 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-19 06:49:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:19,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:19,210 INFO L225 Difference]: With dead ends: 5196 [2020-08-19 06:49:19,211 INFO L226 Difference]: Without dead ends: 2954 [2020-08-19 06:49:19,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-19 06:49:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-19 06:49:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-19 06:49:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-19 06:49:19,326 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-19 06:49:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:19,326 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-19 06:49:19,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-19 06:49:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:19,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:19,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:49:19,336 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-19 06:49:19,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:19,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743169313] [2020-08-19 06:49:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:19,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743169313] [2020-08-19 06:49:19,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:19,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:19,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401999721] [2020-08-19 06:49:19,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:19,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:19,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:19,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:19,365 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-19 06:49:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:19,428 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-19 06:49:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:19,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:19,442 INFO L225 Difference]: With dead ends: 4428 [2020-08-19 06:49:19,443 INFO L226 Difference]: Without dead ends: 3018 [2020-08-19 06:49:19,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-19 06:49:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-19 06:49:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-19 06:49:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-19 06:49:19,541 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-19 06:49:19,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:19,542 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-19 06:49:19,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-19 06:49:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:19,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:19,547 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, 1, 1] [2020-08-19 06:49:19,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:49:19,547 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-19 06:49:19,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:19,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787416289] [2020-08-19 06:49:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:19,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787416289] [2020-08-19 06:49:19,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:19,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:19,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899328779] [2020-08-19 06:49:19,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:19,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:19,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:19,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:19,575 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-19 06:49:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:19,707 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-19 06:49:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:19,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:19,724 INFO L225 Difference]: With dead ends: 8650 [2020-08-19 06:49:19,724 INFO L226 Difference]: Without dead ends: 3016 [2020-08-19 06:49:19,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-19 06:49:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-19 06:49:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-19 06:49:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-19 06:49:19,836 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-19 06:49:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:19,837 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-19 06:49:19,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-19 06:49:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:19,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:19,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:19,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:49:19,846 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-19 06:49:19,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:19,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022227858] [2020-08-19 06:49:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:19,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022227858] [2020-08-19 06:49:19,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:19,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:19,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990392512] [2020-08-19 06:49:19,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:19,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:19,884 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-19 06:49:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:19,930 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-19 06:49:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:19,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:19,931 INFO L225 Difference]: With dead ends: 3016 [2020-08-19 06:49:19,931 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:49:19,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:49:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:49:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:49:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:49:19,937 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-19 06:49:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:19,937 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:49:19,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:49:19,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:49:19,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:49:19,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:49:19,965 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:49:19,965 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:49:19,965 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:49:19,965 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:49:19,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:49:19,966 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:49:19,966 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-19 06:49:19,966 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-19 06:49:19,966 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,966 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-19 06:49:19,966 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,967 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-19 06:49:19,967 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,968 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,968 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-19 06:49:19,968 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-19 06:49:19,968 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-19 06:49:19,968 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-19 06:49:19,968 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-19 06:49:19,968 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,969 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,970 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,970 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,970 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-19 06:49:19,970 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,971 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-19 06:49:19,971 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-19 06:49:19,971 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,971 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,971 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-19 06:49:19,971 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-19 06:49:19,971 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,971 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-19 06:49:19,972 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,972 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,972 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-19 06:49:19,972 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-19 06:49:19,972 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 06:49:19,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:49:19 BoogieIcfgContainer [2020-08-19 06:49:19,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:49:19,991 INFO L168 Benchmark]: Toolchain (without parser) took 4334.10 ms. Allocated memory was 139.5 MB in the beginning and 293.1 MB in the end (delta: 153.6 MB). Free memory was 102.4 MB in the beginning and 188.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:19,992 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 06:49:19,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.67 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:19,993 INFO L168 Benchmark]: Boogie Preprocessor took 111.14 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.7 MB in the beginning and 179.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:19,994 INFO L168 Benchmark]: RCFGBuilder took 343.71 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:19,996 INFO L168 Benchmark]: TraceAbstraction took 3598.24 ms. Allocated memory was 201.9 MB in the beginning and 293.1 MB in the end (delta: 91.2 MB). Free memory was 160.8 MB in the beginning and 188.6 MB in the end (delta: -27.7 MB). Peak memory consumption was 63.5 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:20,007 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.67 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.14 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.7 MB in the beginning and 179.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.71 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3598.24 ms. Allocated memory was 201.9 MB in the beginning and 293.1 MB in the end (delta: 91.2 MB). Free memory was 160.8 MB in the beginning and 188.6 MB in the end (delta: -27.7 MB). Peak memory consumption was 63.5 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: 1.3s, 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, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...