/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:18:35,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:18:35,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:18:35,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:18:35,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:18:35,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:18:35,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:18:35,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:18:36,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:18:36,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:18:36,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:18:36,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:18:36,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:18:36,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:18:36,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:18:36,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:18:36,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:18:36,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:18:36,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:18:36,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:18:36,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:18:36,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:18:36,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:18:36,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:18:36,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:18:36,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:18:36,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:18:36,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:18:36,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:18:36,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 13:18:36,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:18:36,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:18:36,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:18:36,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:18:36,053 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:18:36,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:18:36,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:18:36,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:18:36,055 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:18:36,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:18:36,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:18:36,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:18:36,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:18:36,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:18:36,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:18:36,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:18:36,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:18:36,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:18:36,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:18:36,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:18:36,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:18:36,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:18:36,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:18:36,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:18:36,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:18:36,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:18:36,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:18:36,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:18:36,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:18:36,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:18:36,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:18:36,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:18:36,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:18:36,060 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 -> false [2020-08-21 13:18:36,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:18:36,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:18:36,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:18:36,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:18:36,363 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:18:36,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-08-21 13:18:36,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d4e201c5/e689030176904d25a0a358bf31f532ee/FLAG92fdbd8a8 [2020-08-21 13:18:36,958 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:18:36,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-08-21 13:18:36,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d4e201c5/e689030176904d25a0a358bf31f532ee/FLAG92fdbd8a8 [2020-08-21 13:18:37,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d4e201c5/e689030176904d25a0a358bf31f532ee [2020-08-21 13:18:37,347 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:18:37,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:18:37,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:37,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:18:37,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:18:37,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a067aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37, skipping insertion in model container [2020-08-21 13:18:37,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:18:37,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:18:37,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:37,590 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:18:37,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:37,615 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:18:37,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37 WrapperNode [2020-08-21 13:18:37,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:37,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:18:37,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:18:37,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:18:37,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (1/1) ... [2020-08-21 13:18:37,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:18:37,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:18:37,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:18:37,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:18:37,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:18:37,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:18:37,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:18:37,783 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 13:18:37,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:18:37,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:18:37,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:18:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 13:18:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:18:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:18:37,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:18:37,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:18:37,930 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:18:37,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:37 BoogieIcfgContainer [2020-08-21 13:18:37,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:18:37,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:18:37,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:18:37,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:18:37,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:18:37" (1/3) ... [2020-08-21 13:18:37,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593793e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:37, skipping insertion in model container [2020-08-21 13:18:37,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37" (2/3) ... [2020-08-21 13:18:37,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593793e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:37, skipping insertion in model container [2020-08-21 13:18:37,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:37" (3/3) ... [2020-08-21 13:18:37,942 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-08-21 13:18:37,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:18:37,960 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:18:37,975 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:18:38,000 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:18:38,001 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:18:38,001 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:18:38,001 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:18:38,001 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:18:38,001 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:18:38,002 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:18:38,002 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:18:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 13:18:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:18:38,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:38,023 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,029 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 13:18:38,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607356133] [2020-08-21 13:18:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:18:38,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607356133] [2020-08-21 13:18:38,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:18:38,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:18:38,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756565516] [2020-08-21 13:18:38,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:18:38,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:18:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:38,326 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 13:18:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:38,423 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 13:18:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:18:38,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 13:18:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:38,437 INFO L225 Difference]: With dead ends: 30 [2020-08-21 13:18:38,438 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 13:18:38,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:18:38,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 13:18:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 13:18:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 13:18:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 13:18:38,482 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 13:18:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:38,483 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 13:18:38,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:18:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 13:18:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:18:38,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:38,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:18:38,486 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 13:18:38,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643954414] [2020-08-21 13:18:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:18:38,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643954414] [2020-08-21 13:18:38,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:38,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:18:38,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963934819] [2020-08-21 13:18:38,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:18:38,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:18:38,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:18:38,622 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 13:18:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:38,682 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 13:18:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:18:38,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 13:18:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:38,684 INFO L225 Difference]: With dead ends: 25 [2020-08-21 13:18:38,684 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 13:18:38,686 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 [2020-08-21 13:18:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 13:18:38,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 13:18:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 13:18:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 13:18:38,693 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 13:18:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:38,694 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 13:18:38,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:18:38,694 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 13:18:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:18:38,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:38,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:18:38,696 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 13:18:38,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358637801] [2020-08-21 13:18:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 13:18:38,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358637801] [2020-08-21 13:18:38,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:38,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:18:38,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461323096] [2020-08-21 13:18:38,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:18:38,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:18:38,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:18:38,897 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 13:18:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:38,978 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 13:18:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:18:38,978 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 13:18:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:38,980 INFO L225 Difference]: With dead ends: 28 [2020-08-21 13:18:38,980 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 13:18:38,981 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 [2020-08-21 13:18:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 13:18:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 13:18:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 13:18:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 13:18:38,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 13:18:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:38,988 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 13:18:38,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:18:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 13:18:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:18:38,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,990 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:38,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:18:38,991 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 13:18:38,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914059877] [2020-08-21 13:18:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 13:18:39,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914059877] [2020-08-21 13:18:39,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:39,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:18:39,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150601279] [2020-08-21 13:18:39,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:18:39,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:18:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:18:39,155 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 13:18:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:39,256 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 13:18:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:18:39,256 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 13:18:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:39,259 INFO L225 Difference]: With dead ends: 31 [2020-08-21 13:18:39,259 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 13:18:39,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:18:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 13:18:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 13:18:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 13:18:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 13:18:39,271 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 13:18:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:39,274 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 13:18:39,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:18:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 13:18:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 13:18:39,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:39,277 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:39,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:18:39,278 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 13:18:39,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:39,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087237733] [2020-08-21 13:18:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 13:18:39,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087237733] [2020-08-21 13:18:39,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:39,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:18:39,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851997932] [2020-08-21 13:18:39,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:18:39,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:39,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:18:39,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:18:39,495 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 13:18:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:39,587 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 13:18:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:18:39,588 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 13:18:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:39,589 INFO L225 Difference]: With dead ends: 34 [2020-08-21 13:18:39,589 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 13:18:39,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 13:18:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 13:18:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 13:18:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 13:18:39,597 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 13:18:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:39,598 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 13:18:39,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:18:39,598 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 13:18:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 13:18:39,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:39,600 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:39,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:18:39,600 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 13:18:39,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:39,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527198492] [2020-08-21 13:18:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 13:18:39,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527198492] [2020-08-21 13:18:39,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:39,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:18:39,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243460335] [2020-08-21 13:18:39,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:18:39,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:18:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:18:39,771 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 13:18:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:39,863 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 13:18:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:18:39,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 13:18:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:39,865 INFO L225 Difference]: With dead ends: 37 [2020-08-21 13:18:39,865 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 13:18:39,866 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 [2020-08-21 13:18:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 13:18:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 13:18:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 13:18:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 13:18:39,873 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 13:18:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:39,874 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 13:18:39,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:18:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 13:18:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 13:18:39,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:39,876 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:39,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:18:39,876 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:39,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 13:18:39,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:39,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196163753] [2020-08-21 13:18:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 13:18:40,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196163753] [2020-08-21 13:18:40,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:40,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:18:40,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315915388] [2020-08-21 13:18:40,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:18:40,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:40,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:18:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:40,072 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 13:18:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:40,190 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 13:18:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:18:40,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 13:18:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:40,192 INFO L225 Difference]: With dead ends: 40 [2020-08-21 13:18:40,192 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 13:18:40,193 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 [2020-08-21 13:18:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 13:18:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 13:18:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 13:18:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 13:18:40,200 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 13:18:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:40,200 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 13:18:40,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:18:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 13:18:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 13:18:40,202 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:40,202 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:40,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:18:40,202 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 13:18:40,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:40,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258904993] [2020-08-21 13:18:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 13:18:40,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258904993] [2020-08-21 13:18:40,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:40,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 13:18:40,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080905886] [2020-08-21 13:18:40,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:18:40,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:40,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:18:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:18:40,423 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 13:18:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:40,539 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 13:18:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:18:40,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 13:18:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:40,542 INFO L225 Difference]: With dead ends: 43 [2020-08-21 13:18:40,542 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 13:18:40,543 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 [2020-08-21 13:18:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 13:18:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 13:18:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 13:18:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 13:18:40,556 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 13:18:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:40,557 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 13:18:40,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:18:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 13:18:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 13:18:40,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:40,558 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:40,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:18:40,559 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 13:18:40,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:40,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417487920] [2020-08-21 13:18:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 13:18:40,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417487920] [2020-08-21 13:18:40,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:40,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 13:18:40,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528714439] [2020-08-21 13:18:40,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:18:40,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:18:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:18:40,831 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 13:18:40,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:40,956 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 13:18:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 13:18:40,957 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 13:18:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:40,958 INFO L225 Difference]: With dead ends: 46 [2020-08-21 13:18:40,958 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 13:18:40,959 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 [2020-08-21 13:18:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 13:18:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 13:18:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 13:18:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 13:18:40,966 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 13:18:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:40,967 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 13:18:40,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:18:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 13:18:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 13:18:40,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:40,968 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:40,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:18:40,969 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 13:18:40,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:40,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838581183] [2020-08-21 13:18:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 13:18:41,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838581183] [2020-08-21 13:18:41,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:41,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 13:18:41,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961306814] [2020-08-21 13:18:41,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 13:18:41,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:41,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 13:18:41,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:41,261 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 13:18:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:41,394 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 13:18:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 13:18:41,395 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 13:18:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:41,396 INFO L225 Difference]: With dead ends: 49 [2020-08-21 13:18:41,396 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 13:18:41,397 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 [2020-08-21 13:18:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 13:18:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 13:18:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 13:18:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 13:18:41,403 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 13:18:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:41,404 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 13:18:41,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 13:18:41,404 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 13:18:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 13:18:41,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:41,405 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:41,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:18:41,406 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:41,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 13:18:41,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:41,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710526606] [2020-08-21 13:18:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 13:18:41,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710526606] [2020-08-21 13:18:41,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:41,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 13:18:41,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563029932] [2020-08-21 13:18:41,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:18:41,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:41,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:18:41,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:18:41,815 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 13:18:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:41,997 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 13:18:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:18:41,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 13:18:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:41,999 INFO L225 Difference]: With dead ends: 52 [2020-08-21 13:18:42,000 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 13:18:42,001 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 [2020-08-21 13:18:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 13:18:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 13:18:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 13:18:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 13:18:42,006 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 13:18:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:42,007 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 13:18:42,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:18:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 13:18:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 13:18:42,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:42,008 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:42,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:18:42,009 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 13:18:42,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:42,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035822153] [2020-08-21 13:18:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 13:18:42,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035822153] [2020-08-21 13:18:42,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:42,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 13:18:42,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258126313] [2020-08-21 13:18:42,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:18:42,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:18:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:18:42,425 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 13:18:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:42,590 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 13:18:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 13:18:42,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 13:18:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:42,592 INFO L225 Difference]: With dead ends: 55 [2020-08-21 13:18:42,592 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 13:18:42,593 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 [2020-08-21 13:18:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 13:18:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 13:18:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 13:18:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 13:18:42,599 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 13:18:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:42,599 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 13:18:42,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:18:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 13:18:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 13:18:42,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:42,601 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:42,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:18:42,601 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-21 13:18:42,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:42,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372040718] [2020-08-21 13:18:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 13:18:42,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372040718] [2020-08-21 13:18:42,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:42,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 13:18:42,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141751905] [2020-08-21 13:18:42,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 13:18:42,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:42,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 13:18:42,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:18:42,990 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 13:18:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:43,165 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 13:18:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 13:18:43,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 13:18:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:43,167 INFO L225 Difference]: With dead ends: 58 [2020-08-21 13:18:43,167 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 13:18:43,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-21 13:18:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 13:18:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 13:18:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 13:18:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 13:18:43,179 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 13:18:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:43,179 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 13:18:43,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 13:18:43,179 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 13:18:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 13:18:43,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:43,181 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:43,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:18:43,181 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:43,182 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-21 13:18:43,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:43,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217500784] [2020-08-21 13:18:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 13:18:43,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217500784] [2020-08-21 13:18:43,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:43,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 13:18:43,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735870359] [2020-08-21 13:18:43,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 13:18:43,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 13:18:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:18:43,753 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 13:18:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:43,959 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 13:18:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:18:43,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 13:18:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:43,962 INFO L225 Difference]: With dead ends: 61 [2020-08-21 13:18:43,962 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 13:18:43,964 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 [2020-08-21 13:18:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 13:18:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 13:18:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 13:18:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 13:18:43,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 13:18:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:43,975 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 13:18:43,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 13:18:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 13:18:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 13:18:43,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:43,980 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:43,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:18:43,980 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:43,981 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-21 13:18:43,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:43,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431236117] [2020-08-21 13:18:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 13:18:44,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431236117] [2020-08-21 13:18:44,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:44,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 13:18:44,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912461202] [2020-08-21 13:18:44,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 13:18:44,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 13:18:44,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:18:44,576 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 13:18:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:44,807 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 13:18:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:18:44,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 13:18:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:44,808 INFO L225 Difference]: With dead ends: 64 [2020-08-21 13:18:44,808 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 13:18:44,812 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 [2020-08-21 13:18:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 13:18:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 13:18:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 13:18:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 13:18:44,821 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 13:18:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:44,822 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 13:18:44,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 13:18:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 13:18:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 13:18:44,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:44,824 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:44,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:18:44,825 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-21 13:18:44,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:44,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505748040] [2020-08-21 13:18:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 13:18:45,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505748040] [2020-08-21 13:18:45,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:45,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 13:18:45,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432911525] [2020-08-21 13:18:45,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 13:18:45,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:45,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 13:18:45,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 13:18:45,468 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-21 13:18:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:45,690 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 13:18:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 13:18:45,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-21 13:18:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:45,692 INFO L225 Difference]: With dead ends: 67 [2020-08-21 13:18:45,692 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 13:18:45,695 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 [2020-08-21 13:18:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 13:18:45,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 13:18:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 13:18:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 13:18:45,705 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 13:18:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:45,706 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 13:18:45,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 13:18:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 13:18:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 13:18:45,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:45,708 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:45,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:18:45,709 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-21 13:18:45,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:45,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591513327] [2020-08-21 13:18:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 13:18:46,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591513327] [2020-08-21 13:18:46,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:46,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 13:18:46,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180670408] [2020-08-21 13:18:46,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 13:18:46,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 13:18:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:18:46,429 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 13:18:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:46,659 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 13:18:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 13:18:46,659 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 13:18:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:46,661 INFO L225 Difference]: With dead ends: 70 [2020-08-21 13:18:46,661 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 13:18:46,662 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 [2020-08-21 13:18:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 13:18:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 13:18:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 13:18:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 13:18:46,667 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 13:18:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:46,667 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 13:18:46,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 13:18:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 13:18:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 13:18:46,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:46,669 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:46,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:18:46,669 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-21 13:18:46,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:46,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561001470] [2020-08-21 13:18:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 13:18:47,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561001470] [2020-08-21 13:18:47,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:47,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 13:18:47,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838315782] [2020-08-21 13:18:47,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 13:18:47,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 13:18:47,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:18:47,326 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-21 13:18:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:47,588 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 13:18:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:18:47,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-21 13:18:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:47,589 INFO L225 Difference]: With dead ends: 73 [2020-08-21 13:18:47,589 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 13:18:47,591 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 [2020-08-21 13:18:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 13:18:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 13:18:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 13:18:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 13:18:47,598 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 13:18:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:47,599 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 13:18:47,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 13:18:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 13:18:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 13:18:47,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:47,602 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:47,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 13:18:47,602 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-21 13:18:47,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:47,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045923466] [2020-08-21 13:18:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 13:18:48,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045923466] [2020-08-21 13:18:48,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:48,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 13:18:48,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749187115] [2020-08-21 13:18:48,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 13:18:48,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 13:18:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:18:48,392 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-21 13:18:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:48,660 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 13:18:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 13:18:48,661 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-21 13:18:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:48,662 INFO L225 Difference]: With dead ends: 76 [2020-08-21 13:18:48,663 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 13:18:48,665 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 [2020-08-21 13:18:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 13:18:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 13:18:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 13:18:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 13:18:48,674 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 13:18:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:48,676 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 13:18:48,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 13:18:48,676 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 13:18:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 13:18:48,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:48,679 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:48,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 13:18:48,680 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:48,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-21 13:18:48,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:48,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308980476] [2020-08-21 13:18:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 13:18:49,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308980476] [2020-08-21 13:18:49,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:49,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 13:18:49,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118405487] [2020-08-21 13:18:49,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 13:18:49,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:49,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 13:18:49,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 13:18:49,567 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-21 13:18:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:49,871 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 13:18:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 13:18:49,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-21 13:18:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:49,877 INFO L225 Difference]: With dead ends: 79 [2020-08-21 13:18:49,877 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 13:18:49,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 13:18:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 13:18:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 13:18:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 13:18:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 13:18:49,884 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 13:18:49,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:49,884 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 13:18:49,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 13:18:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 13:18:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 13:18:49,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:49,886 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:49,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 13:18:49,886 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:49,887 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-21 13:18:49,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:49,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178716235] [2020-08-21 13:18:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-21 13:18:50,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178716235] [2020-08-21 13:18:50,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:50,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 13:18:50,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140486707] [2020-08-21 13:18:50,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 13:18:50,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:50,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 13:18:50,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:18:50,949 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2020-08-21 13:18:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:51,383 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-21 13:18:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 13:18:51,385 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2020-08-21 13:18:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:51,387 INFO L225 Difference]: With dead ends: 82 [2020-08-21 13:18:51,387 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 13:18:51,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 13:18:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 13:18:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 13:18:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 13:18:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-21 13:18:51,395 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-21 13:18:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:51,398 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-21 13:18:51,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 13:18:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-21 13:18:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 13:18:51,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:51,402 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:51,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 13:18:51,403 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:51,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-21 13:18:51,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:51,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936795121] [2020-08-21 13:18:51,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 13:18:52,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936795121] [2020-08-21 13:18:52,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:52,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 13:18:52,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409789203] [2020-08-21 13:18:52,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 13:18:52,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:52,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 13:18:52,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:18:52,684 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-21 13:18:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:53,017 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-21 13:18:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 13:18:53,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-21 13:18:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:53,021 INFO L225 Difference]: With dead ends: 85 [2020-08-21 13:18:53,021 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 13:18:53,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 13:18:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 13:18:53,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 13:18:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 13:18:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-21 13:18:53,026 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-21 13:18:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:53,027 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-21 13:18:53,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 13:18:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-21 13:18:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 13:18:53,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:53,029 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:53,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 13:18:53,029 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-21 13:18:53,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:53,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749535860] [2020-08-21 13:18:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-21 13:18:54,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749535860] [2020-08-21 13:18:54,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:54,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 13:18:54,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879225474] [2020-08-21 13:18:54,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 13:18:54,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:54,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 13:18:54,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 13:18:54,438 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2020-08-21 13:18:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:54,853 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-21 13:18:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 13:18:54,853 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-08-21 13:18:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:54,855 INFO L225 Difference]: With dead ends: 88 [2020-08-21 13:18:54,855 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 13:18:54,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-08-21 13:18:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 13:18:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 13:18:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 13:18:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-21 13:18:54,860 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-21 13:18:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:54,861 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-21 13:18:54,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 13:18:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-21 13:18:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 13:18:54,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:54,863 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:54,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 13:18:54,864 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-21 13:18:54,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:54,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769136582] [2020-08-21 13:18:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-21 13:18:56,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769136582] [2020-08-21 13:18:56,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:56,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 13:18:56,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308946436] [2020-08-21 13:18:56,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 13:18:56,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:56,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 13:18:56,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 13:18:56,150 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2020-08-21 13:18:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:56,519 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-21 13:18:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 13:18:56,520 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-08-21 13:18:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:56,521 INFO L225 Difference]: With dead ends: 91 [2020-08-21 13:18:56,521 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 13:18:56,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-21 13:18:56,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 13:18:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 13:18:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 13:18:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-21 13:18:56,531 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-21 13:18:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:56,534 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-21 13:18:56,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 13:18:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-21 13:18:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 13:18:56,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:56,536 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:56,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 13:18:56,539 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:56,539 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-21 13:18:56,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:56,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067808539] [2020-08-21 13:18:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-21 13:18:57,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067808539] [2020-08-21 13:18:57,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:57,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 13:18:57,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563341199] [2020-08-21 13:18:57,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 13:18:57,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 13:18:57,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 13:18:57,781 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2020-08-21 13:18:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:58,201 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-21 13:18:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 13:18:58,204 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-08-21 13:18:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:58,206 INFO L225 Difference]: With dead ends: 94 [2020-08-21 13:18:58,206 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 13:18:58,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-08-21 13:18:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 13:18:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 13:18:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 13:18:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-21 13:18:58,212 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-21 13:18:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:58,212 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-21 13:18:58,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 13:18:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-21 13:18:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-21 13:18:58,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:58,214 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:58,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 13:18:58,215 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:58,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:58,215 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-21 13:18:58,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:58,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962395598] [2020-08-21 13:18:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:18:58,240 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:18:58,240 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:18:58,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 13:18:58,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:18:58 BoogieIcfgContainer [2020-08-21 13:18:58,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:18:58,274 INFO L168 Benchmark]: Toolchain (without parser) took 20924.86 ms. Allocated memory was 138.9 MB in the beginning and 645.4 MB in the end (delta: 506.5 MB). Free memory was 102.0 MB in the beginning and 187.8 MB in the end (delta: -85.9 MB). Peak memory consumption was 420.6 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:58,274 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:18:58,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.25 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:58,275 INFO L168 Benchmark]: Boogie Preprocessor took 24.73 ms. Allocated memory is still 138.9 MB. Free memory was 92.1 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:58,276 INFO L168 Benchmark]: RCFGBuilder took 292.63 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 90.7 MB in the beginning and 169.5 MB in the end (delta: -78.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:58,276 INFO L168 Benchmark]: TraceAbstraction took 20336.48 ms. Allocated memory was 200.8 MB in the beginning and 645.4 MB in the end (delta: 444.6 MB). Free memory was 168.5 MB in the beginning and 187.8 MB in the end (delta: -19.3 MB). Peak memory consumption was 425.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:58,279 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.25 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.73 ms. Allocated memory is still 138.9 MB. Free memory was 92.1 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 292.63 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 90.7 MB in the beginning and 169.5 MB in the end (delta: -78.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20336.48 ms. Allocated memory was 200.8 MB in the beginning and 645.4 MB in the end (delta: 444.6 MB). Free memory was 168.5 MB in the beginning and 187.8 MB in the end (delta: -19.3 MB). Peak memory consumption was 425.3 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 = 25; [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 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; [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 == 25 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.2s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 329 SDtfs, 778 SDslu, 1676 SDs, 0 SdLazy, 985 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1425 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, 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, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 2288 NumberOfCodeBlocks, 2288 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 2100 ConstructedInterpolants, 0 QuantifiedInterpolants, 570000 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 7500/15000 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...