/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=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:42:54,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:42:54,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:42:54,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:42:54,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:42:54,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:42:54,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:42:54,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:42:54,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:42:54,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:42:54,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:42:54,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:42:54,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:42:54,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:42:54,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:42:54,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:42:54,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:42:54,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:42:54,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:42:54,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:42:54,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:42:54,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:42:54,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:42:54,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:42:54,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:42:54,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:42:54,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:42:54,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:42:54,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:42:54,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 22:42:54,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:42:54,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:42:54,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:42:54,127 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 [2020-08-18 22:42:54,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:42:54,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:42:54,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:42:54,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:42:54,151 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:42:54,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:42:54,152 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:42:54,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:42:54,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:42:54,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:42:54,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:42:54,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:42:54,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:42:54,153 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:42:54,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:42:54,154 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:42:54,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:42:54,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:42:54,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:42:54,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:42:54,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:42:54,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:42:54,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:42:54,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:42:54,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:42:54,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:42:54,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:42:54,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:42:54,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:42:54,156 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=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:42:54,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:42:54,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:42:54,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:42:54,466 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:42:54,466 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:42:54,467 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-08-18 22:42:54,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b975cdc20/7b5d15660fdf4b3eb5f5a3f3e8c27a62/FLAG64134343d [2020-08-18 22:42:55,040 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:42:55,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-08-18 22:42:55,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b975cdc20/7b5d15660fdf4b3eb5f5a3f3e8c27a62/FLAG64134343d [2020-08-18 22:42:55,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b975cdc20/7b5d15660fdf4b3eb5f5a3f3e8c27a62 [2020-08-18 22:42:55,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:42:55,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:42:55,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:42:55,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:42:55,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:42:55,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321fecde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55, skipping insertion in model container [2020-08-18 22:42:55,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:42:55,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:42:55,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:42:55,642 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:42:55,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:42:55,673 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:42:55,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55 WrapperNode [2020-08-18 22:42:55,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:42:55,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:42:55,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:42:55,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:42:55,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (1/1) ... [2020-08-18 22:42:55,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:42:55,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:42:55,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:42:55,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:42:55,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (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 [2020-08-18 22:42:55,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:42:55,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:42:55,850 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 22:42:55,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:42:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:42:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:42:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 22:42:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:42:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:42:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:42:56,019 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:42:56,019 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:42:56,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:56 BoogieIcfgContainer [2020-08-18 22:42:56,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:42:56,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:42:56,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:42:56,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:42:56,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:42:55" (1/3) ... [2020-08-18 22:42:56,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742c8e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:56, skipping insertion in model container [2020-08-18 22:42:56,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:55" (2/3) ... [2020-08-18 22:42:56,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742c8e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:56, skipping insertion in model container [2020-08-18 22:42:56,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:56" (3/3) ... [2020-08-18 22:42:56,032 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-08-18 22:42:56,043 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:42:56,050 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:42:56,065 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:42:56,089 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:42:56,090 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:42:56,090 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:42:56,090 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:42:56,090 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:42:56,090 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:42:56,091 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:42:56,091 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:42:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 22:42:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:42:56,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:56,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:56,117 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:56,123 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 22:42:56,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:56,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296193446] [2020-08-18 22:42:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:42:56,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296193446] [2020-08-18 22:42:56,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:56,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:42:56,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917085933] [2020-08-18 22:42:56,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:42:56,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:42:56,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:56,368 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 22:42:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:56,451 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 22:42:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:42:56,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 22:42:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:56,464 INFO L225 Difference]: With dead ends: 30 [2020-08-18 22:42:56,464 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 22:42:56,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:42:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 22:42:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 22:42:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 22:42:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 22:42:56,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 22:42:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:56,510 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 22:42:56,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:42:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 22:42:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:42:56,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:56,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:56,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:42:56,514 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 22:42:56,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:56,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415422614] [2020-08-18 22:42:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:42:56,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415422614] [2020-08-18 22:42:56,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:56,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:42:56,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65026740] [2020-08-18 22:42:56,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:42:56,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:56,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:42:56,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:42:56,662 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 22:42:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:56,730 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 22:42:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:42:56,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 22:42:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:56,732 INFO L225 Difference]: With dead ends: 25 [2020-08-18 22:42:56,733 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 22:42:56,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:42:56,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 22:42:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 22:42:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 22:42:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 22:42:56,741 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 22:42:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:56,742 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 22:42:56,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:42:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 22:42:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:42:56,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:56,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:56,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:42:56,744 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 22:42:56,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:56,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129884187] [2020-08-18 22:42:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 22:42:56,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129884187] [2020-08-18 22:42:56,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:56,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:42:56,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569973773] [2020-08-18 22:42:56,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:42:56,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:56,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:42:56,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:42:56,907 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 22:42:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:56,991 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 22:42:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:42:56,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 22:42:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:56,995 INFO L225 Difference]: With dead ends: 28 [2020-08-18 22:42:56,995 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 22:42:56,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:42:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 22:42:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 22:42:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 22:42:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 22:42:57,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 22:42:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:57,012 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 22:42:57,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:42:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 22:42:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 22:42:57,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:57,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:57,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:42:57,015 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:57,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 22:42:57,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:57,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196920179] [2020-08-18 22:42:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 22:42:57,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196920179] [2020-08-18 22:42:57,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:57,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:42:57,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827994851] [2020-08-18 22:42:57,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:42:57,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:57,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:42:57,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:42:57,320 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 22:42:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:57,422 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 22:42:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:42:57,423 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 22:42:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:57,425 INFO L225 Difference]: With dead ends: 31 [2020-08-18 22:42:57,425 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 22:42:57,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:42:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 22:42:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 22:42:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 22:42:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 22:42:57,438 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 22:42:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:57,439 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 22:42:57,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:42:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 22:42:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 22:42:57,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:57,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:57,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:42:57,444 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:57,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 22:42:57,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:57,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541582196] [2020-08-18 22:42:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 22:42:57,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541582196] [2020-08-18 22:42:57,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:57,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:42:57,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259909673] [2020-08-18 22:42:57,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:42:57,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:42:57,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:42:57,670 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 22:42:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:57,764 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 22:42:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:42:57,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 22:42:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:57,766 INFO L225 Difference]: With dead ends: 34 [2020-08-18 22:42:57,767 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 22:42:57,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:42:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 22:42:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 22:42:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:42:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 22:42:57,775 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 22:42:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:57,775 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 22:42:57,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:42:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 22:42:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 22:42:57,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:57,777 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:57,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:42:57,778 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:57,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 22:42:57,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:57,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44363875] [2020-08-18 22:42:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:57,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 22:42:58,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44363875] [2020-08-18 22:42:58,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:58,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:42:58,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672542286] [2020-08-18 22:42:58,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:42:58,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:58,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:42:58,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:42:58,016 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 22:42:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:58,115 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 22:42:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:42:58,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 22:42:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:58,117 INFO L225 Difference]: With dead ends: 37 [2020-08-18 22:42:58,117 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 22:42:58,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:42:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 22:42:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 22:42:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 22:42:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 22:42:58,126 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 22:42:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:58,127 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 22:42:58,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:42:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 22:42:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 22:42:58,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:58,129 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:58,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:42:58,129 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 22:42:58,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:58,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937578194] [2020-08-18 22:42:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 22:42:58,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937578194] [2020-08-18 22:42:58,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:58,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:42:58,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200031463] [2020-08-18 22:42:58,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:42:58,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:58,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:42:58,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:42:58,342 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 22:42:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:58,474 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 22:42:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:42:58,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 22:42:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:58,476 INFO L225 Difference]: With dead ends: 40 [2020-08-18 22:42:58,476 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 22:42:58,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:42:58,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 22:42:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 22:42:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 22:42:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 22:42:58,484 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 22:42:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:58,484 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 22:42:58,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:42:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 22:42:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 22:42:58,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:58,486 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:58,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:42:58,486 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:58,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 22:42:58,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:58,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727991153] [2020-08-18 22:42:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 22:42:58,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727991153] [2020-08-18 22:42:58,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:58,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:42:58,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214710409] [2020-08-18 22:42:58,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:42:58,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:42:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:42:58,697 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 22:42:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:58,806 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 22:42:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:42:58,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 22:42:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:58,808 INFO L225 Difference]: With dead ends: 43 [2020-08-18 22:42:58,808 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 22:42:58,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:42:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 22:42:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 22:42:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 22:42:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 22:42:58,816 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 22:42:58,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:58,816 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 22:42:58,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 22:42:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 22:42:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 22:42:58,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:58,818 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:58,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:42:58,818 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 22:42:58,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:58,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850647742] [2020-08-18 22:42:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:58,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 22:42:59,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850647742] [2020-08-18 22:42:59,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:59,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:42:59,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429689282] [2020-08-18 22:42:59,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:42:59,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:42:59,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:42:59,106 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 22:42:59,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:59,231 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 22:42:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 22:42:59,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 22:42:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:59,232 INFO L225 Difference]: With dead ends: 46 [2020-08-18 22:42:59,233 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 22:42:59,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:42:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 22:42:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 22:42:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 22:42:59,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 22:42:59,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 22:42:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:59,242 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 22:42:59,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:42:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 22:42:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 22:42:59,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:59,243 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:59,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:42:59,244 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:59,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 22:42:59,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:59,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219096526] [2020-08-18 22:42:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 22:42:59,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219096526] [2020-08-18 22:42:59,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:59,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:42:59,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437357764] [2020-08-18 22:42:59,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:42:59,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:42:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:42:59,546 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 22:42:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:59,687 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 22:42:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:42:59,696 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 22:42:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:59,698 INFO L225 Difference]: With dead ends: 49 [2020-08-18 22:42:59,698 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 22:42:59,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:42:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 22:42:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 22:42:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 22:42:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 22:42:59,705 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 22:42:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:59,706 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 22:42:59,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:42:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 22:42:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 22:42:59,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:59,708 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:59,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:42:59,708 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:59,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 22:42:59,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:59,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461856611] [2020-08-18 22:42:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:59,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 22:43:00,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461856611] [2020-08-18 22:43:00,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:00,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 22:43:00,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394838087] [2020-08-18 22:43:00,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 22:43:00,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:00,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 22:43:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:43:00,048 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 22:43:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:00,195 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 22:43:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:43:00,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 22:43:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:00,197 INFO L225 Difference]: With dead ends: 52 [2020-08-18 22:43:00,197 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 22:43:00,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:43:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 22:43:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 22:43:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 22:43:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 22:43:00,205 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 22:43:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:00,205 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 22:43:00,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 22:43:00,205 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 22:43:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 22:43:00,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:00,207 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:00,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:43:00,207 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:00,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:00,207 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-18 22:43:00,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:00,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436647038] [2020-08-18 22:43:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 22:43:00,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436647038] [2020-08-18 22:43:00,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:00,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 22:43:00,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583447671] [2020-08-18 22:43:00,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 22:43:00,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 22:43:00,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:43:00,644 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 22:43:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:00,837 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 22:43:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:43:00,838 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 22:43:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:00,840 INFO L225 Difference]: With dead ends: 55 [2020-08-18 22:43:00,840 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 22:43:00,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-18 22:43:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 22:43:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 22:43:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 22:43:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 22:43:00,859 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 22:43:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:00,860 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 22:43:00,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 22:43:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 22:43:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 22:43:00,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:00,865 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:00,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:43:00,866 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:00,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-18 22:43:00,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:00,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338237792] [2020-08-18 22:43:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:00,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 22:43:01,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338237792] [2020-08-18 22:43:01,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:01,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 22:43:01,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17015987] [2020-08-18 22:43:01,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 22:43:01,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:01,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 22:43:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:43:01,454 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 22:43:01,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:01,673 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 22:43:01,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 22:43:01,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 22:43:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:01,675 INFO L225 Difference]: With dead ends: 58 [2020-08-18 22:43:01,675 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 22:43:01,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-18 22:43:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 22:43:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 22:43:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 22:43:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 22:43:01,689 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 22:43:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:01,689 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 22:43:01,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 22:43:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 22:43:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 22:43:01,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:01,694 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:01,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:43:01,695 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:01,695 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-18 22:43:01,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:01,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666774201] [2020-08-18 22:43:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:01,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 22:43:02,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666774201] [2020-08-18 22:43:02,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:02,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 22:43:02,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878342713] [2020-08-18 22:43:02,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 22:43:02,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:02,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 22:43:02,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:43:02,197 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 22:43:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:02,404 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 22:43:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:43:02,405 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 22:43:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:02,407 INFO L225 Difference]: With dead ends: 61 [2020-08-18 22:43:02,407 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 22:43:02,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-18 22:43:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 22:43:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 22:43:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 22:43:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 22:43:02,415 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 22:43:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:02,416 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 22:43:02,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 22:43:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 22:43:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 22:43:02,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:02,417 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:02,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:43:02,418 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:02,418 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-18 22:43:02,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:02,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91775859] [2020-08-18 22:43:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 22:43:02,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91775859] [2020-08-18 22:43:02,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:02,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 22:43:02,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725634784] [2020-08-18 22:43:02,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 22:43:02,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:02,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 22:43:02,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:43:02,972 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 22:43:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:03,173 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 22:43:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 22:43:03,174 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 22:43:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:03,175 INFO L225 Difference]: With dead ends: 64 [2020-08-18 22:43:03,175 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 22:43:03,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 22:43:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 22:43:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 22:43:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 22:43:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 22:43:03,189 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 22:43:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:03,191 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 22:43:03,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 22:43:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 22:43:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 22:43:03,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:03,193 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:03,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:43:03,193 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-18 22:43:03,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:03,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162807105] [2020-08-18 22:43:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 22:43:03,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162807105] [2020-08-18 22:43:03,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:03,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 22:43:03,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879005442] [2020-08-18 22:43:03,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 22:43:03,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:03,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 22:43:03,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:43:03,841 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-18 22:43:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:04,064 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 22:43:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:43:04,065 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-18 22:43:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:04,066 INFO L225 Difference]: With dead ends: 67 [2020-08-18 22:43:04,066 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 22:43:04,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 22:43:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 22:43:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 22:43:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 22:43:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 22:43:04,072 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 22:43:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:04,073 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 22:43:04,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 22:43:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 22:43:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 22:43:04,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:04,075 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:04,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:43:04,075 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-18 22:43:04,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:04,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859364870] [2020-08-18 22:43:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 22:43:04,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859364870] [2020-08-18 22:43:04,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:04,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 22:43:04,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146302416] [2020-08-18 22:43:04,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 22:43:04,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:04,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 22:43:04,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:43:04,714 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-18 22:43:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:04,980 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 22:43:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 22:43:04,980 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-18 22:43:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:04,981 INFO L225 Difference]: With dead ends: 70 [2020-08-18 22:43:04,982 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 22:43:04,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 22:43:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 22:43:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 22:43:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 22:43:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 22:43:04,988 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 22:43:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:04,989 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 22:43:04,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 22:43:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 22:43:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 22:43:04,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:04,990 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:04,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:43:04,991 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:04,991 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-18 22:43:04,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:04,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413694614] [2020-08-18 22:43:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 22:43:05,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413694614] [2020-08-18 22:43:05,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:05,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 22:43:05,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610515635] [2020-08-18 22:43:05,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 22:43:05,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 22:43:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:43:05,766 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-18 22:43:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:06,041 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 22:43:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 22:43:06,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-18 22:43:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:06,043 INFO L225 Difference]: With dead ends: 73 [2020-08-18 22:43:06,044 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 22:43:06,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 22:43:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 22:43:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 22:43:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 22:43:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 22:43:06,050 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 22:43:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:06,051 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 22:43:06,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 22:43:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 22:43:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 22:43:06,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:06,053 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:06,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:43:06,053 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-18 22:43:06,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:06,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330370083] [2020-08-18 22:43:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 22:43:06,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330370083] [2020-08-18 22:43:06,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:06,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 22:43:06,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453705585] [2020-08-18 22:43:06,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 22:43:06,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:06,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 22:43:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:43:06,871 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-18 22:43:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:07,155 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 22:43:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 22:43:07,156 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-18 22:43:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:07,157 INFO L225 Difference]: With dead ends: 76 [2020-08-18 22:43:07,157 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 22:43:07,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 22:43:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 22:43:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 22:43:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 22:43:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 22:43:07,165 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 22:43:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:07,166 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 22:43:07,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 22:43:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 22:43:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 22:43:07,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:07,167 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:07,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:43:07,168 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:07,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:07,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-18 22:43:07,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:07,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410399508] [2020-08-18 22:43:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:43:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:07,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:43:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 22:43:08,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410399508] [2020-08-18 22:43:08,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:43:08,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 22:43:08,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155894123] [2020-08-18 22:43:08,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 22:43:08,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 22:43:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:43:08,028 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-18 22:43:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:08,332 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 22:43:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:43:08,333 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-18 22:43:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:08,334 INFO L225 Difference]: With dead ends: 79 [2020-08-18 22:43:08,334 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 22:43:08,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 22:43:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 22:43:08,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 22:43:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 22:43:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 22:43:08,345 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 22:43:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:08,345 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 22:43:08,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 22:43:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 22:43:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 22:43:08,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:08,347 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:08,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:43:08,348 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:08,348 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-18 22:43:08,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:08,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563424539] [2020-08-18 22:43:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 22:43:08,385 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 22:43:08,385 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:43:08,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:43:08,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:43:08 BoogieIcfgContainer [2020-08-18 22:43:08,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:43:08,456 INFO L168 Benchmark]: Toolchain (without parser) took 13042.92 ms. Allocated memory was 144.2 MB in the beginning and 443.5 MB in the end (delta: 299.4 MB). Free memory was 103.2 MB in the beginning and 103.5 MB in the end (delta: -330.4 kB). Peak memory consumption was 299.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:08,457 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 144.2 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 22:43:08,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.22 ms. Allocated memory is still 144.2 MB. Free memory was 103.0 MB in the beginning and 93.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:08,460 INFO L168 Benchmark]: Boogie Preprocessor took 23.74 ms. Allocated memory is still 144.2 MB. Free memory was 93.8 MB in the beginning and 92.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:08,460 INFO L168 Benchmark]: RCFGBuilder took 324.97 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 92.3 MB in the beginning and 170.6 MB in the end (delta: -78.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:08,462 INFO L168 Benchmark]: TraceAbstraction took 12428.68 ms. Allocated memory was 202.4 MB in the beginning and 443.5 MB in the end (delta: 241.2 MB). Free memory was 170.6 MB in the beginning and 103.5 MB in the end (delta: 67.0 MB). Peak memory consumption was 308.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:08,465 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 144.2 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.22 ms. Allocated memory is still 144.2 MB. Free memory was 103.0 MB in the beginning and 93.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.74 ms. Allocated memory is still 144.2 MB. Free memory was 93.8 MB in the beginning and 92.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.97 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 92.3 MB in the beginning and 170.6 MB in the end (delta: -78.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12428.68 ms. Allocated memory was 202.4 MB in the beginning and 443.5 MB in the end (delta: 241.2 MB). Free memory was 170.6 MB in the beginning and 103.5 MB in the end (delta: 67.0 MB). Peak memory consumption was 308.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.3s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 264 SDtfs, 523 SDslu, 1198 SDs, 0 SdLazy, 710 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 940 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1380 ConstructedInterpolants, 0 QuantifiedInterpolants, 301200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 3800/7600 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 incorrect! Received shutdown request...