/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_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:18:35,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:18:35,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:18:35,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:18:35,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:18:35,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:18:35,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:18:35,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:18:35,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:18:35,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:18:35,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:18:35,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:18:35,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:18:35,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:18:35,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:18:35,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:18:35,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:18:35,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:18:35,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:18:35,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:18:35,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:18:35,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:18:35,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:18:35,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:18:35,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:18:35,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:18:35,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:18:35,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:18:35,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:18:35,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:18:35,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:18:35,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:18:35,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:18:35,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:18:35,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:18:35,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:18:35,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:18:35,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:18:35,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:18:35,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:18:35,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:18:35,642 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 13:18:35,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:18:35,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:18:35,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:18:35,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:18:35,681 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:18:35,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:18:35,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:18:35,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:18:35,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:18:35,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:18:35,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:18:35,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:18:35,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:18:35,684 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:18:35,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:18:35,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:18:35,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:18:35,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:18:35,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:18:35,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:18:35,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:18:35,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:18:35,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:18:35,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:18:35,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:18:35,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:18:35,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:18:35,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:18:35,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:18:35,688 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 13:18:36,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:18:36,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:18:36,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:18:36,038 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:18:36,038 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:18:36,039 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-08-21 13:18:36,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35063b49/1aa62f9383c648f8a6d84a8c82799ce4/FLAG897365be3 [2020-08-21 13:18:36,535 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:18:36,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-08-21 13:18:36,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35063b49/1aa62f9383c648f8a6d84a8c82799ce4/FLAG897365be3 [2020-08-21 13:18:36,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c35063b49/1aa62f9383c648f8a6d84a8c82799ce4 [2020-08-21 13:18:36,934 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:18:36,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:18:36,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:36,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:18:36,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:18:36,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:36" (1/1) ... [2020-08-21 13:18:36,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45241865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:36, skipping insertion in model container [2020-08-21 13:18:36,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:36" (1/1) ... [2020-08-21 13:18:36,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:18:36,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:18:37,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:37,223 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:18:37,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:37,261 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:18:37,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:37 WrapperNode [2020-08-21 13:18:37,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:37,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:18:37,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:18:37,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:18:37,280 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 13:18:37,282 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 13:18:37,288 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 13:18:37,288 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 13:18:37,294 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 13:18:37,297 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 13:18:37,298 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 13:18:37,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:18:37,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:18:37,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:18:37,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:18:37,301 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 13:18:37,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:18:37,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:18:37,470 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 13:18:37,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 13:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:18:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:18:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:18:37,638 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:18:37,638 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:18:37,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:37 BoogieIcfgContainer [2020-08-21 13:18:37,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:18:37,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:18:37,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:18:37,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:18:37,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:18:36" (1/3) ... [2020-08-21 13:18:37,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f33006b 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 13:18:37,649 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 13:18:37,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f33006b 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 13:18:37,649 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 13:18:37,651 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2020-08-21 13:18:37,662 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:18:37,669 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:18:37,682 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:18:37,709 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:18:37,709 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:18:37,710 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:18:37,710 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:18:37,710 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:18:37,710 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:18:37,710 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:18:37,710 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:18:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 13:18:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:18:37,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:37,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:37,738 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 13:18:37,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:37,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954470182] [2020-08-21 13:18:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:37,967 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 13:18:37,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954470182] [2020-08-21 13:18:37,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:18:37,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:18:37,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083319830] [2020-08-21 13:18:37,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:18:37,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:18:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:38,007 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 13:18:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:38,094 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 13:18:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:18:38,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 13:18:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:38,108 INFO L225 Difference]: With dead ends: 30 [2020-08-21 13:18:38,108 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 13:18:38,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:18:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 13:18:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 13:18:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 13:18:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 13:18:38,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 13:18:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:38,162 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 13:18:38,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:18:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 13:18:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:18:38,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,164 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 13:18:38,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:18:38,165 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 13:18:38,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198798235] [2020-08-21 13:18:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,227 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 13:18:38,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,313 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 13:18:38,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198798235] [2020-08-21 13:18:38,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:38,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:18:38,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471024719] [2020-08-21 13:18:38,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:18:38,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:18:38,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:18:38,317 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 13:18:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:38,392 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 13:18:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:18:38,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 13:18:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:38,394 INFO L225 Difference]: With dead ends: 25 [2020-08-21 13:18:38,394 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 13:18:38,396 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 13:18:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 13:18:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 13:18:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 13:18:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 13:18:38,403 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 13:18:38,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:38,404 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 13:18:38,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:18:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 13:18:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:18:38,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,406 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 13:18:38,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:18:38,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,408 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 13:18:38,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661732765] [2020-08-21 13:18:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,553 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 13:18:38,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661732765] [2020-08-21 13:18:38,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:38,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:18:38,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516455907] [2020-08-21 13:18:38,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:18:38,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:18:38,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:18:38,557 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 13:18:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:38,623 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 13:18:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:18:38,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 13:18:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:38,625 INFO L225 Difference]: With dead ends: 28 [2020-08-21 13:18:38,625 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 13:18:38,626 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 13:18:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 13:18:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 13:18:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 13:18:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 13:18:38,633 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 13:18:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:38,634 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 13:18:38,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:18:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 13:18:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:18:38,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:38,635 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 13:18:38,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:18:38,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:38,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 13:18:38,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:38,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531965518] [2020-08-21 13:18:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:38,901 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 13:18:38,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531965518] [2020-08-21 13:18:38,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:38,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:18:38,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119618320] [2020-08-21 13:18:38,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:18:38,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:18:38,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:18:38,908 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 13:18:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:39,011 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 13:18:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:18:39,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 13:18:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:39,013 INFO L225 Difference]: With dead ends: 31 [2020-08-21 13:18:39,014 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 13:18:39,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:18:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 13:18:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 13:18:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 13:18:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 13:18:39,022 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 13:18:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:39,022 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 13:18:39,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:18:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 13:18:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 13:18:39,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:39,024 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 13:18:39,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:18:39,025 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:39,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 13:18:39,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:39,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129765182] [2020-08-21 13:18:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,209 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 13:18:39,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129765182] [2020-08-21 13:18:39,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:39,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:18:39,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287941576] [2020-08-21 13:18:39,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:18:39,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:18:39,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:18:39,213 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 13:18:39,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:39,305 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 13:18:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:18:39,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 13:18:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:39,308 INFO L225 Difference]: With dead ends: 34 [2020-08-21 13:18:39,308 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 13:18:39,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 13:18:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 13:18:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 13:18:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 13:18:39,316 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 13:18:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:39,317 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 13:18:39,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:18:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 13:18:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 13:18:39,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:39,319 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 13:18:39,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:18:39,320 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 13:18:39,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:39,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464232645] [2020-08-21 13:18:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,543 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 13:18:39,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464232645] [2020-08-21 13:18:39,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:39,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:18:39,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774165315] [2020-08-21 13:18:39,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:18:39,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:39,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:18:39,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:18:39,549 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 13:18:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:39,671 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 13:18:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:18:39,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 13:18:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:39,673 INFO L225 Difference]: With dead ends: 37 [2020-08-21 13:18:39,673 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 13:18:39,676 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 13:18:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 13:18:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 13:18:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 13:18:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 13:18:39,687 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 13:18:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:39,688 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 13:18:39,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:18:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 13:18:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 13:18:39,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:39,694 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 13:18:39,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:18:39,698 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 13:18:39,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:39,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172401890] [2020-08-21 13:18:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:39,968 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 13:18:39,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172401890] [2020-08-21 13:18:39,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:39,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:18:39,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810320880] [2020-08-21 13:18:39,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:18:39,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:39,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:18:39,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:39,972 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 13:18:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:40,111 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 13:18:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:18:40,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 13:18:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:40,115 INFO L225 Difference]: With dead ends: 40 [2020-08-21 13:18:40,115 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 13:18:40,117 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 13:18:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 13:18:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 13:18:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 13:18:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 13:18:40,128 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 13:18:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:40,131 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 13:18:40,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:18:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 13:18:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 13:18:40,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:40,135 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 13:18:40,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:18:40,136 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 13:18:40,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:40,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052990327] [2020-08-21 13:18:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,277 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 13:18:40,308 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 13:18:40,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,430 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 13:18:40,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052990327] [2020-08-21 13:18:40,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:40,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 13:18:40,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836888738] [2020-08-21 13:18:40,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:18:40,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:40,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:18:40,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:18:40,435 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 13:18:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:40,566 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 13:18:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:18:40,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 13:18:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:40,569 INFO L225 Difference]: With dead ends: 43 [2020-08-21 13:18:40,569 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 13:18:40,570 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 13:18:40,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 13:18:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 13:18:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 13:18:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 13:18:40,584 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 13:18:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:40,584 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 13:18:40,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:18:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 13:18:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 13:18:40,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:40,588 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 13:18:40,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:18:40,589 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:40,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 13:18:40,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:40,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671064033] [2020-08-21 13:18:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,717 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 13:18:40,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:40,931 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 13:18:40,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671064033] [2020-08-21 13:18:40,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:40,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 13:18:40,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916935060] [2020-08-21 13:18:40,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:18:40,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:18:40,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:18:40,939 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 13:18:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:41,089 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 13:18:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 13:18:41,090 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 13:18:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:41,092 INFO L225 Difference]: With dead ends: 46 [2020-08-21 13:18:41,092 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 13:18:41,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:18:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 13:18:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 13:18:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 13:18:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 13:18:41,100 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 13:18:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:41,100 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 13:18:41,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:18:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 13:18:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 13:18:41,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:41,102 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 13:18:41,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:18:41,103 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:41,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:41,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 13:18:41,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:41,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472357026] [2020-08-21 13:18:41,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,398 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 13:18:41,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472357026] [2020-08-21 13:18:41,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:41,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 13:18:41,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130824448] [2020-08-21 13:18:41,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 13:18:41,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:41,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 13:18:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:41,403 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 13:18:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:41,571 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 13:18:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 13:18:41,573 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 13:18:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:41,574 INFO L225 Difference]: With dead ends: 49 [2020-08-21 13:18:41,575 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 13:18:41,582 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 13:18:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 13:18:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 13:18:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 13:18:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 13:18:41,595 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 13:18:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:41,595 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 13:18:41,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 13:18:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 13:18:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 13:18:41,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:41,599 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 13:18:41,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:18:41,600 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:41,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 13:18:41,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:41,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491099269] [2020-08-21 13:18:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,031 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 13:18:42,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491099269] [2020-08-21 13:18:42,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:42,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 13:18:42,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246636922] [2020-08-21 13:18:42,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:18:42,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:42,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:18:42,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:18:42,037 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 13:18:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:42,225 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 13:18:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:18:42,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 13:18:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:42,229 INFO L225 Difference]: With dead ends: 52 [2020-08-21 13:18:42,230 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 13:18:42,231 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 13:18:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 13:18:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 13:18:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 13:18:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 13:18:42,246 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 13:18:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:42,246 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 13:18:42,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:18:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 13:18:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 13:18:42,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:42,249 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 13:18:42,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:18:42,249 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 13:18:42,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:42,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145578056] [2020-08-21 13:18:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,732 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 13:18:42,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145578056] [2020-08-21 13:18:42,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:42,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 13:18:42,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449605868] [2020-08-21 13:18:42,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:18:42,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:18:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:18:42,736 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 13:18:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:42,918 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 13:18:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 13:18:42,918 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 13:18:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:42,920 INFO L225 Difference]: With dead ends: 55 [2020-08-21 13:18:42,920 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 13:18:42,922 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 13:18:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 13:18:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 13:18:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 13:18:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 13:18:42,936 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 13:18:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:42,936 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 13:18:42,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:18:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 13:18:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 13:18:42,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:42,943 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 13:18:42,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:18:42,943 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:42,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-21 13:18:42,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:42,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232758407] [2020-08-21 13:18:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,252 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 13:18:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,415 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 13:18:43,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232758407] [2020-08-21 13:18:43,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:43,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 13:18:43,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516237972] [2020-08-21 13:18:43,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 13:18:43,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 13:18:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:18:43,417 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 13:18:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:43,624 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 13:18:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 13:18:43,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 13:18:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:43,626 INFO L225 Difference]: With dead ends: 58 [2020-08-21 13:18:43,626 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 13:18:43,629 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 13:18:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 13:18:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 13:18:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 13:18:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 13:18:43,644 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 13:18:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:43,645 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 13:18:43,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 13:18:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 13:18:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 13:18:43,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:43,649 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 13:18:43,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:18:43,650 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-21 13:18:43,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:43,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102597210] [2020-08-21 13:18:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,075 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 13:18:44,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,200 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 13:18:44,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102597210] [2020-08-21 13:18:44,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:44,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 13:18:44,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829127858] [2020-08-21 13:18:44,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 13:18:44,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:44,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 13:18:44,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:18:44,203 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 13:18:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:44,423 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 13:18:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:18:44,424 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 13:18:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:44,425 INFO L225 Difference]: With dead ends: 61 [2020-08-21 13:18:44,425 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 13:18:44,426 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 13:18:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 13:18:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 13:18:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 13:18:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 13:18:44,434 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 13:18:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:44,434 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 13:18:44,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 13:18:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 13:18:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 13:18:44,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:44,438 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 13:18:44,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:18:44,438 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:44,438 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-21 13:18:44,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:44,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280915169] [2020-08-21 13:18:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,060 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 13:18:45,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280915169] [2020-08-21 13:18:45,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:45,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 13:18:45,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900720890] [2020-08-21 13:18:45,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 13:18:45,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 13:18:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:18:45,064 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 13:18:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:45,352 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 13:18:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:18:45,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 13:18:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:45,354 INFO L225 Difference]: With dead ends: 64 [2020-08-21 13:18:45,354 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 13:18:45,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 13:18:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 13:18:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 13:18:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 13:18:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 13:18:45,361 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 13:18:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:45,361 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 13:18:45,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 13:18:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 13:18:45,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 13:18:45,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:45,363 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 13:18:45,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:18:45,363 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:45,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-21 13:18:45,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:45,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647929569] [2020-08-21 13:18:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,964 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 13:18:45,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647929569] [2020-08-21 13:18:45,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:45,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 13:18:45,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130656329] [2020-08-21 13:18:45,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 13:18:45,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:45,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 13:18:45,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 13:18:45,966 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-21 13:18:46,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:46,185 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 13:18:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 13:18:46,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-21 13:18:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:46,188 INFO L225 Difference]: With dead ends: 67 [2020-08-21 13:18:46,188 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 13:18:46,190 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 13:18:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 13:18:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 13:18:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 13:18:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 13:18:46,199 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 13:18:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:46,200 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 13:18:46,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 13:18:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 13:18:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 13:18:46,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:46,201 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 13:18:46,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:18:46,205 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:46,206 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-21 13:18:46,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:46,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910483556] [2020-08-21 13:18:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,932 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 13:18:46,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910483556] [2020-08-21 13:18:46,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:46,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 13:18:46,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295671803] [2020-08-21 13:18:46,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 13:18:46,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 13:18:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:18:46,935 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 13:18:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:47,174 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 13:18:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 13:18:47,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 13:18:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:47,176 INFO L225 Difference]: With dead ends: 70 [2020-08-21 13:18:47,176 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 13:18:47,179 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 13:18:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 13:18:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 13:18:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 13:18:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 13:18:47,188 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 13:18:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:47,189 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 13:18:47,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 13:18:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 13:18:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 13:18:47,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:47,191 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 13:18:47,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:18:47,192 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:47,192 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-21 13:18:47,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:47,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946415647] [2020-08-21 13:18:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,918 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 13:18:47,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946415647] [2020-08-21 13:18:47,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:47,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 13:18:47,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186187936] [2020-08-21 13:18:47,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 13:18:47,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:47,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 13:18:47,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:18:47,923 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-21 13:18:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:48,187 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 13:18:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:18:48,188 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-21 13:18:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:48,189 INFO L225 Difference]: With dead ends: 73 [2020-08-21 13:18:48,189 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 13:18:48,191 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 13:18:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 13:18:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 13:18:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 13:18:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 13:18:48,199 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 13:18:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:48,199 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 13:18:48,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 13:18:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 13:18:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 13:18:48,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:48,201 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 13:18:48,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 13:18:48,202 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:48,202 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-21 13:18:48,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:48,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928546079] [2020-08-21 13:18:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,075 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 13:18:49,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928546079] [2020-08-21 13:18:49,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:49,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 13:18:49,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091591705] [2020-08-21 13:18:49,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 13:18:49,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:49,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 13:18:49,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:18:49,079 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-21 13:18:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:49,358 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 13:18:49,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 13:18:49,358 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-21 13:18:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:49,360 INFO L225 Difference]: With dead ends: 76 [2020-08-21 13:18:49,360 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 13:18:49,362 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 13:18:49,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 13:18:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 13:18:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 13:18:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 13:18:49,366 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 13:18:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:49,366 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 13:18:49,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 13:18:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 13:18:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 13:18:49,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:49,368 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 13:18:49,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 13:18:49,368 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-21 13:18:49,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:49,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919405121] [2020-08-21 13:18:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,198 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 13:18:50,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919405121] [2020-08-21 13:18:50,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:50,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 13:18:50,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668734745] [2020-08-21 13:18:50,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 13:18:50,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:50,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 13:18:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 13:18:50,201 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-21 13:18:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:50,479 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 13:18:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 13:18:50,480 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-21 13:18:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:50,481 INFO L225 Difference]: With dead ends: 79 [2020-08-21 13:18:50,481 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 13:18:50,482 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 13:18:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 13:18:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 13:18:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 13:18:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 13:18:50,487 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 13:18:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:50,487 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 13:18:50,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 13:18:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 13:18:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 13:18:50,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:50,489 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 13:18:50,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 13:18:50,489 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-21 13:18:50,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:50,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719960759] [2020-08-21 13:18:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,378 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 13:18:51,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719960759] [2020-08-21 13:18:51,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:51,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 13:18:51,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705166158] [2020-08-21 13:18:51,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 13:18:51,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:51,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 13:18:51,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:18:51,381 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2020-08-21 13:18:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:51,704 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-21 13:18:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 13:18:51,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2020-08-21 13:18:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:51,706 INFO L225 Difference]: With dead ends: 82 [2020-08-21 13:18:51,707 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 13:18:51,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 13:18:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 13:18:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 13:18:51,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 13:18:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-21 13:18:51,714 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-21 13:18:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:51,715 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-21 13:18:51,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 13:18:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-21 13:18:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 13:18:51,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:51,718 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 13:18:51,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 13:18:51,719 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-21 13:18:51,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:51,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500586741] [2020-08-21 13:18:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,002 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 13:18:53,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500586741] [2020-08-21 13:18:53,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:53,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 13:18:53,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069263228] [2020-08-21 13:18:53,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 13:18:53,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 13:18:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:18:53,007 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-21 13:18:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:53,331 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-21 13:18:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 13:18:53,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-21 13:18:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:53,334 INFO L225 Difference]: With dead ends: 85 [2020-08-21 13:18:53,334 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 13:18:53,337 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 13:18:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 13:18:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 13:18:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 13:18:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-21 13:18:53,342 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-21 13:18:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:53,343 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-21 13:18:53,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 13:18:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-21 13:18:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 13:18:53,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:53,345 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 13:18:53,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 13:18:53,345 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:53,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-21 13:18:53,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:53,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757103329] [2020-08-21 13:18:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,091 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 13:18:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,476 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 13:18:54,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757103329] [2020-08-21 13:18:54,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:54,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 13:18:54,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735778323] [2020-08-21 13:18:54,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 13:18:54,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:54,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 13:18:54,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 13:18:54,486 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2020-08-21 13:18:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:54,958 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-21 13:18:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 13:18:54,959 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-08-21 13:18:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:54,961 INFO L225 Difference]: With dead ends: 88 [2020-08-21 13:18:54,961 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 13:18:54,963 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 13:18:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 13:18:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 13:18:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 13:18:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-21 13:18:54,969 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-21 13:18:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:54,969 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-21 13:18:54,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 13:18:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-21 13:18:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 13:18:54,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:54,971 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 13:18:54,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 13:18:54,972 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-21 13:18:54,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:54,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059813620] [2020-08-21 13:18:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,535 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 13:18:55,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,855 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 13:18:55,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,914 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 13:18:56,131 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 13:18:56,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059813620] [2020-08-21 13:18:56,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:56,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 13:18:56,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208104183] [2020-08-21 13:18:56,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 13:18:56,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 13:18:56,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 13:18:56,135 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2020-08-21 13:18:56,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:56,528 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-21 13:18:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 13:18:56,529 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-08-21 13:18:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:56,531 INFO L225 Difference]: With dead ends: 91 [2020-08-21 13:18:56,531 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 13:18:56,532 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 13:18:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 13:18:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 13:18:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 13:18:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-21 13:18:56,537 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-21 13:18:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:56,537 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-21 13:18:56,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 13:18:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-21 13:18:56,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 13:18:56,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:56,539 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 13:18:56,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 13:18:56,540 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:56,540 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-21 13:18:56,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:56,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120069553] [2020-08-21 13:18:56,541 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 13:18:56,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,770 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 13:18:57,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120069553] [2020-08-21 13:18:57,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:57,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 13:18:57,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80515480] [2020-08-21 13:18:57,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 13:18:57,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:57,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 13:18:57,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 13:18:57,772 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2020-08-21 13:18:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:58,210 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-21 13:18:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 13:18:58,211 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-08-21 13:18:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:58,212 INFO L225 Difference]: With dead ends: 94 [2020-08-21 13:18:58,213 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 13:18:58,214 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 13:18:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 13:18:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 13:18:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 13:18:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-21 13:18:58,219 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-21 13:18:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:58,219 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-21 13:18:58,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 13:18:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-21 13:18:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-21 13:18:58,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:58,221 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 13:18:58,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 13:18:58,221 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-21 13:18:58,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:58,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113202292] [2020-08-21 13:18:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-21 13:19:01,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113202292] [2020-08-21 13:19:01,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:01,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-21 13:19:01,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418892153] [2020-08-21 13:19:01,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-21 13:19:01,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-21 13:19:01,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 13:19:01,540 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-21 13:19:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:02,860 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-21 13:19:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-21 13:19:02,860 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-21 13:19:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:02,863 INFO L225 Difference]: With dead ends: 97 [2020-08-21 13:19:02,864 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 13:19:02,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 13:19:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 13:19:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-21 13:19:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 13:19:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-21 13:19:02,871 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-21 13:19:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:02,871 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-21 13:19:02,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-21 13:19:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-21 13:19:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-21 13:19:02,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:02,873 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:02,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 13:19:02,873 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-21 13:19:02,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:02,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261627063] [2020-08-21 13:19:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-21 13:19:04,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261627063] [2020-08-21 13:19:04,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:04,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 13:19:04,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138677364] [2020-08-21 13:19:04,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 13:19:04,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 13:19:04,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-21 13:19:04,375 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 31 states. [2020-08-21 13:19:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:05,104 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-08-21 13:19:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 13:19:05,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2020-08-21 13:19:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:05,105 INFO L225 Difference]: With dead ends: 93 [2020-08-21 13:19:05,105 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:19:05,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1142, Invalid=2164, Unknown=0, NotChecked=0, Total=3306 [2020-08-21 13:19:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:19:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:19:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:19:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:19:05,107 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2020-08-21 13:19:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:05,108 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:19:05,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 13:19:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:19:05,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:19:05,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 13:19:05,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:19:05,137 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:19:05,137 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:19:05,138 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:19:05,138 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:19:05,138 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:19:05,138 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:19:05,138 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-21 13:19:05,138 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 13:19:05,138 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 13:19:05,138 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-21 13:19:05,138 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-21 13:19:05,139 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 25 main_~input~0) (<= main_~input~0 25)) [2020-08-21 13:19:05,139 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-21 13:19:05,139 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-21 13:19:05,139 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-21 13:19:05,139 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-21 13:19:05,139 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-21 13:19:05,139 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-21 13:19:05,140 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 13:19:05,140 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-21 13:19:05,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:19:05 BoogieIcfgContainer [2020-08-21 13:19:05,155 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:19:05,158 INFO L168 Benchmark]: Toolchain (without parser) took 28221.40 ms. Allocated memory was 141.0 MB in the beginning and 642.3 MB in the end (delta: 501.2 MB). Free memory was 104.4 MB in the beginning and 521.7 MB in the end (delta: -417.3 MB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:05,158 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:19:05,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.08 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 94.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:05,159 INFO L168 Benchmark]: Boogie Preprocessor took 35.12 ms. Allocated memory is still 141.0 MB. Free memory was 94.9 MB in the beginning and 93.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:05,160 INFO L168 Benchmark]: RCFGBuilder took 342.77 ms. Allocated memory was 141.0 MB in the beginning and 205.5 MB in the end (delta: 64.5 MB). Free memory was 93.5 MB in the beginning and 173.5 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:05,160 INFO L168 Benchmark]: TraceAbstraction took 27511.35 ms. Allocated memory was 205.5 MB in the beginning and 642.3 MB in the end (delta: 436.7 MB). Free memory was 173.5 MB in the beginning and 521.7 MB in the end (delta: -348.2 MB). Peak memory consumption was 88.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:05,163 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 327.08 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 94.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.12 ms. Allocated memory is still 141.0 MB. Free memory was 94.9 MB in the beginning and 93.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 342.77 ms. Allocated memory was 141.0 MB in the beginning and 205.5 MB in the end (delta: 64.5 MB). Free memory was 93.5 MB in the beginning and 173.5 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27511.35 ms. Allocated memory was 205.5 MB in the beginning and 642.3 MB in the end (delta: 436.7 MB). Free memory was 173.5 MB in the beginning and 521.7 MB in the end (delta: -348.2 MB). Peak memory consumption was 88.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.4s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 455 SDtfs, 782 SDslu, 4695 SDs, 0 SdLazy, 3193 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1647 GetRequests, 838 SyntacticMatches, 0 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 18.2s InterpolantComputationTime, 2457 NumberOfCodeBlocks, 2457 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 2430 ConstructedInterpolants, 0 QuantifiedInterpolants, 744336 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 1 PerfectInterpolantSequences, 10452/18954 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...