/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=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:35:01,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:35:01,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:35:01,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:35:01,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:35:01,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:35:01,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:35:01,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:35:01,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:35:01,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:35:01,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:35:01,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:35:01,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:35:01,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:35:01,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:35:01,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:35:01,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:35:01,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:35:01,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:35:01,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:35:01,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:35:01,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:35:01,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:35:01,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:35:01,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 03:35:01,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:35:01,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:35:01,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:35:01,228 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 03:35:01,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:35:01,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:35:01,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:35:01,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:35:01,252 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:35:01,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:35:01,252 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:35:01,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:35:01,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:35:01,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:35:01,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:35:01,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:35:01,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:35:01,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:35:01,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:35:01,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:35:01,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:35:01,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:35:01,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:35:01,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:35:01,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:35:01,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:35:01,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:35:01,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:35:01,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:35:01,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:35:01,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:35:01,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:35:01,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:35:01,257 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=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:35:01,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:35:01,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:35:01,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:35:01,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:35:01,597 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:35:01,598 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 03:35:01,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a87743512/5dd4998a5086476a8762c8cd269c4730/FLAGfc33ced59 [2020-08-19 03:35:02,161 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:35:02,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 03:35:02,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a87743512/5dd4998a5086476a8762c8cd269c4730/FLAGfc33ced59 [2020-08-19 03:35:02,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a87743512/5dd4998a5086476a8762c8cd269c4730 [2020-08-19 03:35:02,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:35:02,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:35:02,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:35:02,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:35:02,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:35:02,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:02,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9fa743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02, skipping insertion in model container [2020-08-19 03:35:02,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:02,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:35:02,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:35:02,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:35:02,797 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:35:02,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:35:02,989 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:35:02,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02 WrapperNode [2020-08-19 03:35:02,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:35:02,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:35:02,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:35:02,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:35:03,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:03,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:03,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:03,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:03,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:03,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:03,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (1/1) ... [2020-08-19 03:35:03,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:35:03,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:35:03,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:35:03,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:35:03,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (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 03:35:03,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:35:03,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:35:03,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:35:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:35:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 03:35:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:35:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:35:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:35:03,413 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:35:03,414 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 03:35:03,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:35:03 BoogieIcfgContainer [2020-08-19 03:35:03,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:35:03,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:35:03,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:35:03,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:35:03,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:35:02" (1/3) ... [2020-08-19 03:35:03,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afb5d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:35:03, skipping insertion in model container [2020-08-19 03:35:03,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:02" (2/3) ... [2020-08-19 03:35:03,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afb5d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:35:03, skipping insertion in model container [2020-08-19 03:35:03,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:35:03" (3/3) ... [2020-08-19 03:35:03,432 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-19 03:35:03,448 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:35:03,457 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:35:03,474 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:35:03,502 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:35:03,503 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:35:03,503 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:35:03,503 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:35:03,503 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:35:03,503 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:35:03,504 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:35:03,504 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:35:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-19 03:35:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 03:35:03,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,535 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 03:35:03,536 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,543 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-19 03:35:03,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772785357] [2020-08-19 03:35:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,773 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 03:35:03,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772785357] [2020-08-19 03:35:03,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:03,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:03,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153908759] [2020-08-19 03:35:03,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:03,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:03,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:03,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,803 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-19 03:35:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:03,885 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-19 03:35:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:03,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 03:35:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:03,901 INFO L225 Difference]: With dead ends: 93 [2020-08-19 03:35:03,901 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 03:35:03,905 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 03:35:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 03:35:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-19 03:35:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 03:35:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-19 03:35:03,954 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-19 03:35:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:03,954 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-19 03:35:03,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-19 03:35:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 03:35:03,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,956 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 03:35:03,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:35:03,957 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-19 03:35:03,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427931792] [2020-08-19 03:35:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,049 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 03:35:04,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427931792] [2020-08-19 03:35:04,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185036954] [2020-08-19 03:35:04,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,053 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-19 03:35:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,089 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-19 03:35:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 03:35:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,092 INFO L225 Difference]: With dead ends: 127 [2020-08-19 03:35:04,092 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 03:35:04,094 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 03:35:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 03:35:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 03:35:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 03:35:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-19 03:35:04,107 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-19 03:35:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,107 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-19 03:35:04,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-19 03:35:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 03:35:04,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,109 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 03:35:04,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:35:04,110 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-19 03:35:04,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193222570] [2020-08-19 03:35:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:04,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193222570] [2020-08-19 03:35:04,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851180433] [2020-08-19 03:35:04,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,196 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-19 03:35:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,241 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-19 03:35:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 03:35:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,243 INFO L225 Difference]: With dead ends: 117 [2020-08-19 03:35:04,243 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 03:35:04,244 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 03:35:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 03:35:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-19 03:35:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 03:35:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-19 03:35:04,255 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-19 03:35:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,255 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-19 03:35:04,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-19 03:35:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 03:35:04,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,257 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 03:35:04,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:35:04,258 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-19 03:35:04,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625087167] [2020-08-19 03:35:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:04,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625087167] [2020-08-19 03:35:04,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873223217] [2020-08-19 03:35:04,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,309 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-19 03:35:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,346 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-19 03:35:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 03:35:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,352 INFO L225 Difference]: With dead ends: 148 [2020-08-19 03:35:04,352 INFO L226 Difference]: Without dead ends: 146 [2020-08-19 03:35:04,353 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 03:35:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-19 03:35:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-19 03:35:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 03:35:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-19 03:35:04,372 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-19 03:35:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,372 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-19 03:35:04,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-19 03:35:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 03:35:04,374 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,374 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 03:35:04,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:35:04,375 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-19 03:35:04,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643760470] [2020-08-19 03:35:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:04,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643760470] [2020-08-19 03:35:04,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651708176] [2020-08-19 03:35:04,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,423 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-19 03:35:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,447 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-19 03:35:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 03:35:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,450 INFO L225 Difference]: With dead ends: 244 [2020-08-19 03:35:04,450 INFO L226 Difference]: Without dead ends: 148 [2020-08-19 03:35:04,451 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 03:35:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-19 03:35:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-19 03:35:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-19 03:35:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-19 03:35:04,468 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-19 03:35:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,474 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-19 03:35:04,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-19 03:35:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 03:35:04,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,477 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 03:35:04,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:35:04,478 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,479 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-19 03:35:04,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101782036] [2020-08-19 03:35:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:04,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101782036] [2020-08-19 03:35:04,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387092724] [2020-08-19 03:35:04,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,528 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-19 03:35:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,565 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-19 03:35:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 03:35:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,567 INFO L225 Difference]: With dead ends: 219 [2020-08-19 03:35:04,567 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 03:35:04,568 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 03:35:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 03:35:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-19 03:35:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-19 03:35:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-19 03:35:04,581 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-19 03:35:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,581 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-19 03:35:04,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-19 03:35:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 03:35:04,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,583 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 03:35:04,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:35:04,583 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-19 03:35:04,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384805875] [2020-08-19 03:35:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,633 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 03:35:04,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384805875] [2020-08-19 03:35:04,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129224522] [2020-08-19 03:35:04,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,636 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-19 03:35:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,667 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-19 03:35:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 03:35:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,672 INFO L225 Difference]: With dead ends: 276 [2020-08-19 03:35:04,672 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 03:35:04,673 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 03:35:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 03:35:04,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-19 03:35:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 03:35:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-19 03:35:04,704 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-19 03:35:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,704 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-19 03:35:04,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-19 03:35:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 03:35:04,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,708 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 03:35:04,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:35:04,709 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-19 03:35:04,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573837144] [2020-08-19 03:35:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:04,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573837144] [2020-08-19 03:35:04,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734350610] [2020-08-19 03:35:04,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,756 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-19 03:35:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,777 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-19 03:35:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 03:35:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,779 INFO L225 Difference]: With dead ends: 472 [2020-08-19 03:35:04,779 INFO L226 Difference]: Without dead ends: 282 [2020-08-19 03:35:04,781 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 03:35:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-19 03:35:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-19 03:35:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-19 03:35:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-19 03:35:04,797 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-19 03:35:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,797 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-19 03:35:04,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-19 03:35:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 03:35:04,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,799 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 03:35:04,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:35:04,800 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-19 03:35:04,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137864667] [2020-08-19 03:35:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,853 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 03:35:04,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137864667] [2020-08-19 03:35:04,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786631144] [2020-08-19 03:35:04,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,856 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-19 03:35:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,910 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-19 03:35:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 03:35:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,913 INFO L225 Difference]: With dead ends: 420 [2020-08-19 03:35:04,913 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 03:35:04,914 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 03:35:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 03:35:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-19 03:35:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-19 03:35:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-19 03:35:04,941 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-19 03:35:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,941 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-19 03:35:04,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-19 03:35:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 03:35:04,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,947 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 03:35:04,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 03:35:04,947 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-19 03:35:04,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890694057] [2020-08-19 03:35:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,011 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 03:35:05,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890694057] [2020-08-19 03:35:05,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219264498] [2020-08-19 03:35:05,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,018 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-19 03:35:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,057 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-19 03:35:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 03:35:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,062 INFO L225 Difference]: With dead ends: 524 [2020-08-19 03:35:05,062 INFO L226 Difference]: Without dead ends: 522 [2020-08-19 03:35:05,063 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 03:35:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-19 03:35:05,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-19 03:35:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 03:35:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-19 03:35:05,084 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-19 03:35:05,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,087 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-19 03:35:05,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-19 03:35:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 03:35:05,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:05,093 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 03:35:05,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 03:35:05,093 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-19 03:35:05,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:05,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563480284] [2020-08-19 03:35:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,154 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 03:35:05,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563480284] [2020-08-19 03:35:05,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237159156] [2020-08-19 03:35:05,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,158 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-19 03:35:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,207 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-19 03:35:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 03:35:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,211 INFO L225 Difference]: With dead ends: 924 [2020-08-19 03:35:05,211 INFO L226 Difference]: Without dead ends: 546 [2020-08-19 03:35:05,212 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 03:35:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-19 03:35:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-19 03:35:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-19 03:35:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-19 03:35:05,231 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-19 03:35:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,231 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-19 03:35:05,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-19 03:35:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 03:35:05,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:05,233 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 03:35:05,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 03:35:05,233 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:05,234 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-19 03:35:05,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:05,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803471164] [2020-08-19 03:35:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,258 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 03:35:05,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803471164] [2020-08-19 03:35:05,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702522454] [2020-08-19 03:35:05,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,261 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-19 03:35:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,282 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-19 03:35:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 03:35:05,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,286 INFO L225 Difference]: With dead ends: 816 [2020-08-19 03:35:05,287 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 03:35:05,288 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 03:35:05,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 03:35:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-19 03:35:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-19 03:35:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-19 03:35:05,305 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-19 03:35:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,305 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-19 03:35:05,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-19 03:35:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 03:35:05,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:05,307 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 03:35:05,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 03:35:05,308 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:05,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-19 03:35:05,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:05,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422825793] [2020-08-19 03:35:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,332 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 03:35:05,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422825793] [2020-08-19 03:35:05,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791535694] [2020-08-19 03:35:05,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,335 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-19 03:35:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,359 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-19 03:35:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 03:35:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,366 INFO L225 Difference]: With dead ends: 1004 [2020-08-19 03:35:05,366 INFO L226 Difference]: Without dead ends: 1002 [2020-08-19 03:35:05,367 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 03:35:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-19 03:35:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-19 03:35:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 03:35:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-19 03:35:05,396 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-19 03:35:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,396 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-19 03:35:05,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-19 03:35:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 03:35:05,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:05,399 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 03:35:05,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 03:35:05,399 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-19 03:35:05,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:05,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681698824] [2020-08-19 03:35:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,427 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 03:35:05,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681698824] [2020-08-19 03:35:05,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240633174] [2020-08-19 03:35:05,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,430 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-19 03:35:05,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,466 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-19 03:35:05,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 03:35:05,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,472 INFO L225 Difference]: With dead ends: 1820 [2020-08-19 03:35:05,473 INFO L226 Difference]: Without dead ends: 1066 [2020-08-19 03:35:05,475 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 03:35:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-19 03:35:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-19 03:35:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-19 03:35:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-19 03:35:05,513 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-19 03:35:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,514 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-19 03:35:05,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-19 03:35:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 03:35:05,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:05,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:05,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 03:35:05,517 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-19 03:35:05,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:05,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458262399] [2020-08-19 03:35:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,557 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 03:35:05,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458262399] [2020-08-19 03:35:05,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171354375] [2020-08-19 03:35:05,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,560 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-19 03:35:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,595 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-19 03:35:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 03:35:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,601 INFO L225 Difference]: With dead ends: 1596 [2020-08-19 03:35:05,601 INFO L226 Difference]: Without dead ends: 1082 [2020-08-19 03:35:05,603 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 03:35:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-19 03:35:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-19 03:35:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-19 03:35:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-19 03:35:05,638 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-19 03:35:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,638 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-19 03:35:05,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-19 03:35:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 03:35:05,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:05,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:05,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 03:35:05,641 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:05,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:05,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-19 03:35:05,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:05,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38213655] [2020-08-19 03:35:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,665 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 03:35:05,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38213655] [2020-08-19 03:35:05,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106559596] [2020-08-19 03:35:05,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,667 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-19 03:35:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,705 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-19 03:35:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 03:35:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,716 INFO L225 Difference]: With dead ends: 1932 [2020-08-19 03:35:05,717 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 03:35:05,718 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 03:35:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 03:35:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-19 03:35:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 03:35:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-19 03:35:05,783 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-19 03:35:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,783 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-19 03:35:05,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-19 03:35:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 03:35:05,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:05,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:05,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 03:35:05,788 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:05,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-19 03:35:05,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:05,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340017674] [2020-08-19 03:35:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,813 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 03:35:05,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340017674] [2020-08-19 03:35:05,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200607508] [2020-08-19 03:35:05,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,816 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-19 03:35:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,890 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-19 03:35:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 03:35:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,904 INFO L225 Difference]: With dead ends: 3596 [2020-08-19 03:35:05,904 INFO L226 Difference]: Without dead ends: 2090 [2020-08-19 03:35:05,908 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 03:35:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-19 03:35:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-19 03:35:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-19 03:35:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-19 03:35:05,998 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-19 03:35:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,999 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-19 03:35:05,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-19 03:35:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:35:06,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:06,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:06,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 03:35:06,005 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:06,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-19 03:35:06,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:06,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774294151] [2020-08-19 03:35:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,033 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 03:35:06,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774294151] [2020-08-19 03:35:06,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:06,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:06,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720190416] [2020-08-19 03:35:06,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:06,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:06,036 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-19 03:35:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:06,090 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-19 03:35:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:06,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 03:35:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:06,103 INFO L225 Difference]: With dead ends: 3132 [2020-08-19 03:35:06,103 INFO L226 Difference]: Without dead ends: 2122 [2020-08-19 03:35:06,106 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 03:35:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-19 03:35:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-19 03:35:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-19 03:35:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-19 03:35:06,215 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-19 03:35:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:06,215 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-19 03:35:06,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-19 03:35:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:35:06,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:06,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:06,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 03:35:06,219 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:06,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-19 03:35:06,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:06,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564667937] [2020-08-19 03:35:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,245 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 03:35:06,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564667937] [2020-08-19 03:35:06,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:06,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:06,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671292844] [2020-08-19 03:35:06,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:06,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:06,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:06,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:06,248 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-19 03:35:06,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:06,309 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-19 03:35:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:06,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 03:35:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:06,329 INFO L225 Difference]: With dead ends: 3724 [2020-08-19 03:35:06,329 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 03:35:06,331 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 03:35:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 03:35:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-19 03:35:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-19 03:35:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-19 03:35:06,424 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-19 03:35:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:06,424 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-19 03:35:06,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-19 03:35:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:35:06,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:06,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:06,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 03:35:06,431 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:06,431 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-19 03:35:06,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:06,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178414397] [2020-08-19 03:35:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,458 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 03:35:06,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178414397] [2020-08-19 03:35:06,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:06,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:06,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89708117] [2020-08-19 03:35:06,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:06,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:06,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:06,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:06,460 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-19 03:35:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:06,533 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-19 03:35:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:06,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 03:35:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:06,554 INFO L225 Difference]: With dead ends: 7116 [2020-08-19 03:35:06,554 INFO L226 Difference]: Without dead ends: 4106 [2020-08-19 03:35:06,561 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 03:35:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-19 03:35:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-19 03:35:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-19 03:35:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-19 03:35:06,730 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-19 03:35:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:06,730 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-19 03:35:06,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-19 03:35:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 03:35:06,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:06,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:06,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 03:35:06,740 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:06,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-19 03:35:06,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:06,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089379523] [2020-08-19 03:35:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,770 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 03:35:06,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089379523] [2020-08-19 03:35:06,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:06,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:06,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767680811] [2020-08-19 03:35:06,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:06,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:06,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:06,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:06,774 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-19 03:35:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:06,841 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-19 03:35:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:06,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 03:35:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:06,885 INFO L225 Difference]: With dead ends: 6156 [2020-08-19 03:35:06,885 INFO L226 Difference]: Without dead ends: 4170 [2020-08-19 03:35:06,890 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 03:35:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-19 03:35:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-19 03:35:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-19 03:35:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-19 03:35:07,014 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-19 03:35:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:07,014 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-19 03:35:07,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-19 03:35:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 03:35:07,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:07,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:07,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 03:35:07,021 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-19 03:35:07,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:07,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889823521] [2020-08-19 03:35:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:07,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:07,048 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 03:35:07,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889823521] [2020-08-19 03:35:07,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:07,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:07,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528316574] [2020-08-19 03:35:07,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:07,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:07,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:07,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:07,051 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-19 03:35:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:07,167 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-19 03:35:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:07,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 03:35:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:07,187 INFO L225 Difference]: With dead ends: 12108 [2020-08-19 03:35:07,187 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 03:35:07,197 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 03:35:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 03:35:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-19 03:35:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 03:35:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-19 03:35:07,470 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-19 03:35:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:07,470 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-19 03:35:07,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-19 03:35:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 03:35:07,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:07,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:07,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 03:35:07,480 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-19 03:35:07,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:07,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153919542] [2020-08-19 03:35:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:07,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:07,529 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 03:35:07,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153919542] [2020-08-19 03:35:07,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:07,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:07,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939484861] [2020-08-19 03:35:07,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:07,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:07,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:07,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:07,532 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-19 03:35:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:07,662 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-19 03:35:07,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:07,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 03:35:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:07,682 INFO L225 Difference]: With dead ends: 9100 [2020-08-19 03:35:07,682 INFO L226 Difference]: Without dead ends: 9098 [2020-08-19 03:35:07,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:07,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-19 03:35:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-19 03:35:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 03:35:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-19 03:35:07,992 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-19 03:35:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:07,993 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-19 03:35:07,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-19 03:35:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 03:35:08,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:08,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:08,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 03:35:08,003 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-19 03:35:08,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:08,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769087596] [2020-08-19 03:35:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:08,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:08,027 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 03:35:08,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769087596] [2020-08-19 03:35:08,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:08,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:08,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544306849] [2020-08-19 03:35:08,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:08,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:08,029 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-19 03:35:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:08,196 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-19 03:35:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:08,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 03:35:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:08,226 INFO L225 Difference]: With dead ends: 13708 [2020-08-19 03:35:08,226 INFO L226 Difference]: Without dead ends: 13706 [2020-08-19 03:35:08,233 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 03:35:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-19 03:35:08,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-19 03:35:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-19 03:35:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-19 03:35:08,473 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-19 03:35:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:08,474 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-19 03:35:08,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-19 03:35:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 03:35:08,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:08,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:08,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 03:35:08,493 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-19 03:35:08,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:08,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979448956] [2020-08-19 03:35:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:08,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:08,515 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 03:35:08,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979448956] [2020-08-19 03:35:08,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:08,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:08,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764827641] [2020-08-19 03:35:08,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:08,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:08,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:08,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:08,517 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-19 03:35:08,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:08,808 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-19 03:35:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:08,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 03:35:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:08,837 INFO L225 Difference]: With dead ends: 27788 [2020-08-19 03:35:08,837 INFO L226 Difference]: Without dead ends: 15754 [2020-08-19 03:35:08,859 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 03:35:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-19 03:35:09,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-19 03:35:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-19 03:35:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-19 03:35:09,298 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-19 03:35:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:09,298 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-19 03:35:09,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-19 03:35:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 03:35:09,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:09,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:09,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 03:35:09,318 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-19 03:35:09,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:09,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167667236] [2020-08-19 03:35:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:09,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:09,337 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 03:35:09,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167667236] [2020-08-19 03:35:09,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:09,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:09,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706117502] [2020-08-19 03:35:09,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:09,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:09,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:09,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:09,339 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-19 03:35:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:09,525 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-19 03:35:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:09,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 03:35:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:09,555 INFO L225 Difference]: With dead ends: 23820 [2020-08-19 03:35:09,555 INFO L226 Difference]: Without dead ends: 16138 [2020-08-19 03:35:09,575 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 03:35:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-19 03:35:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-19 03:35:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-19 03:35:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-19 03:35:09,864 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-19 03:35:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:09,865 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-19 03:35:09,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-19 03:35:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 03:35:09,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:09,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:09,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 03:35:09,888 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-19 03:35:09,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:09,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865628158] [2020-08-19 03:35:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:09,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:09,915 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 03:35:09,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865628158] [2020-08-19 03:35:09,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:09,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:09,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336215064] [2020-08-19 03:35:09,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:09,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:09,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:09,917 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-19 03:35:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:10,544 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-19 03:35:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:10,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 03:35:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:10,598 INFO L225 Difference]: With dead ends: 26636 [2020-08-19 03:35:10,598 INFO L226 Difference]: Without dead ends: 26634 [2020-08-19 03:35:10,608 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 03:35:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-19 03:35:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-19 03:35:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-19 03:35:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-19 03:35:11,088 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-19 03:35:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:11,088 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-19 03:35:11,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-19 03:35:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 03:35:11,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:11,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:11,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 03:35:11,130 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:11,131 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-19 03:35:11,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:11,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418224925] [2020-08-19 03:35:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:11,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:11,154 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 03:35:11,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418224925] [2020-08-19 03:35:11,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:11,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:11,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367604276] [2020-08-19 03:35:11,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:11,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:11,156 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-19 03:35:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:11,475 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-19 03:35:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:11,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 03:35:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:11,522 INFO L225 Difference]: With dead ends: 55308 [2020-08-19 03:35:11,522 INFO L226 Difference]: Without dead ends: 31242 [2020-08-19 03:35:11,569 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 03:35:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-19 03:35:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-19 03:35:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-19 03:35:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-19 03:35:12,291 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-19 03:35:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:12,292 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-19 03:35:12,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-19 03:35:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 03:35:12,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:12,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:12,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 03:35:12,318 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-19 03:35:12,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:12,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324728273] [2020-08-19 03:35:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:12,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:12,338 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 03:35:12,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324728273] [2020-08-19 03:35:12,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:12,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:12,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831232611] [2020-08-19 03:35:12,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:12,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:12,339 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-19 03:35:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:12,683 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-19 03:35:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:12,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 03:35:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:12,736 INFO L225 Difference]: With dead ends: 46860 [2020-08-19 03:35:12,736 INFO L226 Difference]: Without dead ends: 31754 [2020-08-19 03:35:12,764 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 03:35:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-19 03:35:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-19 03:35:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-19 03:35:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-19 03:35:13,444 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-19 03:35:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:13,445 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-19 03:35:13,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-19 03:35:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 03:35:13,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:13,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:13,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 03:35:13,464 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-19 03:35:13,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:13,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513317445] [2020-08-19 03:35:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:13,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:13,485 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 03:35:13,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513317445] [2020-08-19 03:35:13,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:13,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:13,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194978174] [2020-08-19 03:35:13,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:13,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:13,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:13,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:13,487 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-19 03:35:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:13,893 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-19 03:35:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:13,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 03:35:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:13,946 INFO L225 Difference]: With dead ends: 51210 [2020-08-19 03:35:13,946 INFO L226 Difference]: Without dead ends: 51208 [2020-08-19 03:35:13,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-19 03:35:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-19 03:35:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-19 03:35:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-19 03:35:15,321 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-19 03:35:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:15,321 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-19 03:35:15,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-19 03:35:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 03:35:15,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:15,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:15,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 03:35:15,356 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-19 03:35:15,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:15,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143104879] [2020-08-19 03:35:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:15,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:15,375 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 03:35:15,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143104879] [2020-08-19 03:35:15,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:15,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:15,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045319941] [2020-08-19 03:35:15,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:15,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:15,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:15,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:15,377 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-19 03:35:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:16,119 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-19 03:35:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:16,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 03:35:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:16,120 INFO L225 Difference]: With dead ends: 109576 [2020-08-19 03:35:16,120 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 03:35:16,209 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 03:35:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 03:35:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 03:35:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 03:35:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 03:35:16,210 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-19 03:35:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:16,210 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 03:35:16,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 03:35:16,211 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 03:35:16,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 03:35:16,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 03:35:16,249 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 03:35:16,249 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 03:35:16,249 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 03:35:16,249 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 03:35:16,249 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 03:35:16,249 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 03:35:16,249 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-19 03:35:16,250 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-19 03:35:16,250 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-19 03:35:16,250 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-19 03:35:16,250 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-19 03:35:16,250 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-19 03:35:16,250 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,250 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,250 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,250 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,251 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-19 03:35:16,253 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,253 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-19 03:35:16,254 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,254 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,254 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-19 03:35:16,254 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,254 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-19 03:35:16,254 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,254 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,254 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-19 03:35:16,255 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-19 03:35:16,255 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-19 03:35:16,255 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-19 03:35:16,255 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,255 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,255 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-19 03:35:16,255 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-19 03:35:16,255 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-19 03:35:16,255 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-19 03:35:16,256 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,257 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 03:35:16,257 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-19 03:35:16,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:35:16 BoogieIcfgContainer [2020-08-19 03:35:16,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:35:16,284 INFO L168 Benchmark]: Toolchain (without parser) took 13734.45 ms. Allocated memory was 144.7 MB in the beginning and 1.1 GB in the end (delta: 968.4 MB). Free memory was 102.8 MB in the beginning and 721.2 MB in the end (delta: -618.4 MB). Peak memory consumption was 350.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:16,289 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 121.4 MB in the beginning and 121.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-19 03:35:16,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.33 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 102.3 MB in the beginning and 182.2 MB in the end (delta: -79.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:16,292 INFO L168 Benchmark]: Boogie Preprocessor took 36.78 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 180.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:16,292 INFO L168 Benchmark]: RCFGBuilder took 393.63 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 160.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:16,293 INFO L168 Benchmark]: TraceAbstraction took 12858.58 ms. Allocated memory was 203.9 MB in the beginning and 1.1 GB in the end (delta: 909.1 MB). Free memory was 159.5 MB in the beginning and 721.2 MB in the end (delta: -561.7 MB). Peak memory consumption was 347.4 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:16,296 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 121.4 MB in the beginning and 121.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 436.33 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 102.3 MB in the beginning and 182.2 MB in the end (delta: -79.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.78 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 180.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.63 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 160.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12858.58 ms. Allocated memory was 203.9 MB in the beginning and 1.1 GB in the end (delta: 909.1 MB). Free memory was 159.5 MB in the beginning and 721.2 MB in the end (delta: -561.7 MB). Peak memory consumption was 347.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.7s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.7s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...