/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:02:10,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:02:10,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:02:10,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:02:10,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:02:10,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:02:10,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:02:10,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:02:10,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:02:10,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:02:10,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:02:10,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:02:10,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:02:10,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:02:10,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:02:10,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:02:10,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:02:10,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:02:10,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:02:10,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:02:10,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:02:10,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:02:10,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:02:10,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:02:10,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:02:10,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:02:10,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:02:10,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:02:10,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:02:10,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 03:02:10,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:02:10,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:02:10,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:02:10,734 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 [2020-08-22 03:02:10,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:02:10,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:02:10,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:02:10,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:02:10,764 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:02:10,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:02:10,764 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:02:10,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:02:10,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:02:10,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:02:10,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:02:10,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:02:10,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:02:10,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:02:10,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:02:10,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:02:10,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:02:10,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:02:10,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:02:10,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:02:10,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:02:10,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:02:10,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:02:10,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:02:10,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:02:10,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:02:10,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:02:10,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:02:10,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:02:10,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 03:02:11,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:02:11,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:02:11,139 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:02:11,141 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:02:11,142 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:02:11,143 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-22 03:02:11,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/521ec738c/381dddea2f284e2d8ee7385003386d57/FLAG67aac5e11 [2020-08-22 03:02:11,662 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:02:11,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o20.c [2020-08-22 03:02:11,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/521ec738c/381dddea2f284e2d8ee7385003386d57/FLAG67aac5e11 [2020-08-22 03:02:12,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/521ec738c/381dddea2f284e2d8ee7385003386d57 [2020-08-22 03:02:12,041 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:02:12,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:02:12,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:02:12,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:02:12,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:02:12,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4700e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12, skipping insertion in model container [2020-08-22 03:02:12,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:02:12,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:02:12,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:02:12,259 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:02:12,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:02:12,293 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:02:12,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12 WrapperNode [2020-08-22 03:02:12,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:02:12,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:02:12,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:02:12,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:02:12,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (1/1) ... [2020-08-22 03:02:12,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:02:12,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:02:12,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:02:12,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:02:12,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (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 [2020-08-22 03:02:12,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:02:12,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:02:12,507 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 03:02:12,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:02:12,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 03:02:12,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:02:12,507 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 03:02:12,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:02:12,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:02:12,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:02:12,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:02:12,665 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:02:12,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:02:12 BoogieIcfgContainer [2020-08-22 03:02:12,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:02:12,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:02:12,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:02:12,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:02:12,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:02:12" (1/3) ... [2020-08-22 03:02:12,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cea6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:02:12, skipping insertion in model container [2020-08-22 03:02:12,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:02:12" (2/3) ... [2020-08-22 03:02:12,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cea6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:02:12, skipping insertion in model container [2020-08-22 03:02:12,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:02:12" (3/3) ... [2020-08-22 03:02:12,678 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o20.c [2020-08-22 03:02:12,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:02:12,695 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:02:12,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:02:12,734 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:02:12,734 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:02:12,734 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:02:12,734 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:02:12,735 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:02:12,735 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:02:12,735 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:02:12,735 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:02:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 03:02:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 03:02:12,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:12,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:12,761 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:12,766 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 03:02:12,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:12,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359797183] [2020-08-22 03:02:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,071 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-08-22 03:02:13,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:02:13,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359797183] [2020-08-22 03:02:13,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:02:13,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:02:13,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317890290] [2020-08-22 03:02:13,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:02:13,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:13,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:02:13,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:02:13,177 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 03:02:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:13,229 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-22 03:02:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:02:13,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 03:02:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:13,243 INFO L225 Difference]: With dead ends: 32 [2020-08-22 03:02:13,243 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 03:02:13,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:02:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 03:02:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 03:02:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 03:02:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 03:02:13,298 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 03:02:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:13,298 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 03:02:13,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:02:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 03:02:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:02:13,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:13,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:13,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:02:13,301 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:13,302 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 03:02:13,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:13,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45667305] [2020-08-22 03:02:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 03:02:13,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45667305] [2020-08-22 03:02:13,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:13,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:02:13,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020362674] [2020-08-22 03:02:13,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:02:13,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:02:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:02:13,528 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-22 03:02:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:13,565 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 03:02:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:02:13,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-22 03:02:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:13,567 INFO L225 Difference]: With dead ends: 25 [2020-08-22 03:02:13,567 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 03:02:13,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:02:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 03:02:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 03:02:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 03:02:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 03:02:13,576 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 03:02:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:13,576 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 03:02:13,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:02:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 03:02:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:02:13,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:13,578 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:13,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:02:13,579 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:13,580 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 03:02:13,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:13,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835118664] [2020-08-22 03:02:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 03:02:13,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835118664] [2020-08-22 03:02:13,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:13,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:02:13,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706888257] [2020-08-22 03:02:13,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:02:13,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:13,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:02:13,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:02:13,863 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-22 03:02:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:13,916 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 03:02:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:02:13,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-22 03:02:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:13,919 INFO L225 Difference]: With dead ends: 28 [2020-08-22 03:02:13,919 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 03:02:13,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:02:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 03:02:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 03:02:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 03:02:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 03:02:13,927 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 03:02:13,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:13,928 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 03:02:13,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:02:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 03:02:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 03:02:13,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:13,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:13,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:02:13,931 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:13,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 03:02:13,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:13,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605172160] [2020-08-22 03:02:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 03:02:14,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605172160] [2020-08-22 03:02:14,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:14,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:02:14,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885266105] [2020-08-22 03:02:14,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:02:14,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:02:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:02:14,236 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-22 03:02:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:14,311 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 03:02:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:02:14,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-22 03:02:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:14,313 INFO L225 Difference]: With dead ends: 31 [2020-08-22 03:02:14,313 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 03:02:14,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:02:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 03:02:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 03:02:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 03:02:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 03:02:14,321 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 03:02:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:14,321 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 03:02:14,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:02:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 03:02:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 03:02:14,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:14,323 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:14,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:02:14,324 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 03:02:14,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:14,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499798082] [2020-08-22 03:02:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 03:02:14,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499798082] [2020-08-22 03:02:14,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:14,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:02:14,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657594588] [2020-08-22 03:02:14,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:02:14,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:02:14,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:02:14,703 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-22 03:02:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:14,788 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 03:02:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 03:02:14,789 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-22 03:02:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:14,790 INFO L225 Difference]: With dead ends: 34 [2020-08-22 03:02:14,790 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 03:02:14,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:02:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 03:02:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 03:02:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 03:02:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 03:02:14,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 03:02:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:14,800 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 03:02:14,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:02:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 03:02:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 03:02:14,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:14,802 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:14,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:02:14,802 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 03:02:14,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:14,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104470878] [2020-08-22 03:02:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:14,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 03:02:15,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104470878] [2020-08-22 03:02:15,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:15,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 03:02:15,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989057228] [2020-08-22 03:02:15,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 03:02:15,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 03:02:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:02:15,127 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-22 03:02:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:15,228 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 03:02:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:02:15,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-22 03:02:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:15,230 INFO L225 Difference]: With dead ends: 37 [2020-08-22 03:02:15,231 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 03:02:15,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:02:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 03:02:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 03:02:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 03:02:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 03:02:15,238 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 03:02:15,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:15,238 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 03:02:15,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 03:02:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 03:02:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 03:02:15,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:15,240 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:15,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:02:15,241 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 03:02:15,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:15,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867446067] [2020-08-22 03:02:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 03:02:15,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867446067] [2020-08-22 03:02:15,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:15,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 03:02:15,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437631748] [2020-08-22 03:02:15,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 03:02:15,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 03:02:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:02:15,592 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-22 03:02:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:15,708 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 03:02:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 03:02:15,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-22 03:02:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:15,710 INFO L225 Difference]: With dead ends: 40 [2020-08-22 03:02:15,710 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 03:02:15,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:02:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 03:02:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 03:02:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 03:02:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 03:02:15,717 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 03:02:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:15,718 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 03:02:15,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 03:02:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 03:02:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 03:02:15,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:15,720 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:15,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:02:15,720 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 03:02:15,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:15,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028806070] [2020-08-22 03:02:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 03:02:16,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028806070] [2020-08-22 03:02:16,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:16,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 03:02:16,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368749231] [2020-08-22 03:02:16,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 03:02:16,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 03:02:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:02:16,166 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-22 03:02:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:16,316 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 03:02:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 03:02:16,317 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-22 03:02:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:16,318 INFO L225 Difference]: With dead ends: 43 [2020-08-22 03:02:16,318 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 03:02:16,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:02:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 03:02:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 03:02:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 03:02:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 03:02:16,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 03:02:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:16,326 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 03:02:16,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 03:02:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 03:02:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 03:02:16,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:16,328 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:16,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:02:16,328 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 03:02:16,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:16,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303904769] [2020-08-22 03:02:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 03:02:16,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303904769] [2020-08-22 03:02:16,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:16,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 03:02:16,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818459884] [2020-08-22 03:02:16,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 03:02:16,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:16,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 03:02:16,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:02:16,825 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-22 03:02:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:16,999 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 03:02:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 03:02:17,000 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-22 03:02:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:17,002 INFO L225 Difference]: With dead ends: 46 [2020-08-22 03:02:17,002 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 03:02:17,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:02:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 03:02:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 03:02:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 03:02:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 03:02:17,010 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 03:02:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:17,010 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 03:02:17,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 03:02:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 03:02:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 03:02:17,012 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:17,012 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:17,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:02:17,013 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 03:02:17,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:17,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309630088] [2020-08-22 03:02:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 03:02:17,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309630088] [2020-08-22 03:02:17,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:17,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 03:02:17,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263616640] [2020-08-22 03:02:17,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 03:02:17,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:17,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 03:02:17,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:02:17,633 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-22 03:02:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:17,826 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 03:02:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 03:02:17,827 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-22 03:02:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:17,828 INFO L225 Difference]: With dead ends: 49 [2020-08-22 03:02:17,828 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 03:02:17,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:02:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 03:02:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 03:02:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 03:02:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 03:02:17,836 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 03:02:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:17,836 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 03:02:17,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 03:02:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 03:02:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 03:02:17,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:17,838 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:17,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:02:17,838 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:17,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 03:02:17,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:17,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985723825] [2020-08-22 03:02:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:17,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 03:02:18,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985723825] [2020-08-22 03:02:18,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:18,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 03:02:18,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80546771] [2020-08-22 03:02:18,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 03:02:18,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 03:02:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:02:18,623 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-22 03:02:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:18,864 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 03:02:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 03:02:18,864 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-22 03:02:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:18,866 INFO L225 Difference]: With dead ends: 52 [2020-08-22 03:02:18,866 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:02:18,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:02:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:02:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 03:02:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 03:02:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 03:02:18,873 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 03:02:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:18,873 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 03:02:18,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 03:02:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 03:02:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 03:02:18,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:18,875 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:18,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:02:18,875 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:18,876 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 03:02:18,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:18,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622607554] [2020-08-22 03:02:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:18,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 03:02:19,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622607554] [2020-08-22 03:02:19,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:19,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 03:02:19,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864585001] [2020-08-22 03:02:19,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 03:02:19,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:19,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 03:02:19,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:02:19,754 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-22 03:02:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:20,052 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 03:02:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 03:02:20,053 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-22 03:02:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:20,054 INFO L225 Difference]: With dead ends: 55 [2020-08-22 03:02:20,055 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 03:02:20,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:02:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 03:02:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 03:02:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 03:02:20,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 03:02:20,071 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 03:02:20,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:20,072 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 03:02:20,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 03:02:20,072 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 03:02:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 03:02:20,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:20,074 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:20,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:02:20,074 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 03:02:20,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:20,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301690046] [2020-08-22 03:02:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:20,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 03:02:21,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301690046] [2020-08-22 03:02:21,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:21,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 03:02:21,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767101083] [2020-08-22 03:02:21,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 03:02:21,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:21,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 03:02:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-22 03:02:21,083 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-22 03:02:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:21,407 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 03:02:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 03:02:21,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-22 03:02:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:21,409 INFO L225 Difference]: With dead ends: 58 [2020-08-22 03:02:21,410 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 03:02:21,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-22 03:02:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 03:02:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 03:02:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 03:02:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 03:02:21,421 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 03:02:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:21,422 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 03:02:21,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 03:02:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 03:02:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 03:02:21,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:21,426 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:21,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:02:21,427 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:21,427 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 03:02:21,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:21,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732966684] [2020-08-22 03:02:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:21,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:22,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:22,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:22,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:22,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:22,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:22,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 03:02:22,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732966684] [2020-08-22 03:02:22,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:22,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 03:02:22,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280131026] [2020-08-22 03:02:22,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 03:02:22,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 03:02:22,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-22 03:02:22,519 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-22 03:02:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:22,914 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 03:02:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 03:02:22,914 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-22 03:02:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:22,917 INFO L225 Difference]: With dead ends: 61 [2020-08-22 03:02:22,918 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 03:02:22,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-22 03:02:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 03:02:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 03:02:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 03:02:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 03:02:22,930 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 03:02:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:22,932 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 03:02:22,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 03:02:22,932 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 03:02:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 03:02:22,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:22,935 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:22,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:02:22,936 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 03:02:22,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:22,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172254286] [2020-08-22 03:02:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:23,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 03:02:24,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172254286] [2020-08-22 03:02:24,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:24,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 03:02:24,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367553581] [2020-08-22 03:02:24,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 03:02:24,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 03:02:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 03:02:24,042 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-22 03:02:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:24,472 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 03:02:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 03:02:24,473 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-22 03:02:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:24,474 INFO L225 Difference]: With dead ends: 64 [2020-08-22 03:02:24,474 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 03:02:24,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 03:02:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 03:02:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 03:02:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 03:02:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 03:02:24,481 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 03:02:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:24,481 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 03:02:24,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 03:02:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 03:02:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 03:02:24,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:24,483 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:24,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:02:24,483 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:24,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 03:02:24,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:24,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649244854] [2020-08-22 03:02:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:24,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 03:02:25,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649244854] [2020-08-22 03:02:25,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:25,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 03:02:25,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926107258] [2020-08-22 03:02:25,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 03:02:25,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:25,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 03:02:25,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 03:02:25,765 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-22 03:02:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:26,263 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 03:02:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 03:02:26,264 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-22 03:02:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:26,266 INFO L225 Difference]: With dead ends: 67 [2020-08-22 03:02:26,266 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 03:02:26,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 03:02:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 03:02:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 03:02:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 03:02:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 03:02:26,274 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 03:02:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:26,275 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 03:02:26,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 03:02:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 03:02:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 03:02:26,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:26,276 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:26,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:02:26,277 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:26,277 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 03:02:26,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:26,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071364115] [2020-08-22 03:02:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:26,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:27,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:27,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:27,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:27,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 03:02:27,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071364115] [2020-08-22 03:02:27,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:27,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 03:02:27,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263174751] [2020-08-22 03:02:27,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 03:02:27,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:27,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 03:02:27,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 03:02:27,604 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-22 03:02:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:28,184 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-22 03:02:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 03:02:28,184 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-22 03:02:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:28,185 INFO L225 Difference]: With dead ends: 70 [2020-08-22 03:02:28,186 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 03:02:28,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 03:02:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 03:02:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 03:02:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 03:02:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-22 03:02:28,198 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-22 03:02:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:28,198 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-22 03:02:28,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 03:02:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-22 03:02:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 03:02:28,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:28,201 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:28,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:02:28,202 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:28,202 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-22 03:02:28,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:28,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894452330] [2020-08-22 03:02:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:28,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:29,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:29,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:29,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:29,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:29,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:29,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:29,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 03:02:30,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894452330] [2020-08-22 03:02:30,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:30,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 03:02:30,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159531290] [2020-08-22 03:02:30,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 03:02:30,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:30,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 03:02:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 03:02:30,076 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-22 03:02:30,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:30,701 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-22 03:02:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 03:02:30,701 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-22 03:02:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:30,702 INFO L225 Difference]: With dead ends: 73 [2020-08-22 03:02:30,702 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 03:02:30,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 03:02:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 03:02:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-22 03:02:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 03:02:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-22 03:02:30,708 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-22 03:02:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:30,709 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-22 03:02:30,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 03:02:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-22 03:02:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 03:02:30,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:30,712 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:30,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 03:02:30,713 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-22 03:02:30,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:30,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942344243] [2020-08-22 03:02:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:30,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:30,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:30,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:30,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:31,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:32,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:32,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:32,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-22 03:02:32,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942344243] [2020-08-22 03:02:32,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:32,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 03:02:32,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810019010] [2020-08-22 03:02:32,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 03:02:32,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:32,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 03:02:32,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 03:02:32,514 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-22 03:02:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:33,185 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-22 03:02:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 03:02:33,186 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-22 03:02:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:33,187 INFO L225 Difference]: With dead ends: 76 [2020-08-22 03:02:33,187 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 03:02:33,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 03:02:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 03:02:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-22 03:02:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 03:02:33,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-22 03:02:33,202 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-22 03:02:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:33,202 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-22 03:02:33,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 03:02:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-22 03:02:33,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 03:02:33,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:33,204 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:33,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 03:02:33,204 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:33,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-22 03:02:33,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:33,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353491673] [2020-08-22 03:02:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:02:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:02:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:33,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:34,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:02:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:02:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-22 03:02:35,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353491673] [2020-08-22 03:02:35,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:02:35,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 03:02:35,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007524897] [2020-08-22 03:02:35,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 03:02:35,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:02:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 03:02:35,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 03:02:35,057 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-22 03:02:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:02:35,852 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-22 03:02:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 03:02:35,853 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-22 03:02:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:02:35,855 INFO L225 Difference]: With dead ends: 79 [2020-08-22 03:02:35,855 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 03:02:35,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 03:02:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 03:02:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-22 03:02:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 03:02:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-22 03:02:35,862 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-22 03:02:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:02:35,862 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-22 03:02:35,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 03:02:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-22 03:02:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 03:02:35,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:02:35,864 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:02:35,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 03:02:35,864 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:02:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:02:35,864 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-22 03:02:35,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:02:35,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629359179] [2020-08-22 03:02:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:02:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 03:02:35,957 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 03:02:35,958 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 03:02:35,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 03:02:35,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:02:35 BoogieIcfgContainer [2020-08-22 03:02:35,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:02:35,991 INFO L168 Benchmark]: Toolchain (without parser) took 23947.97 ms. Allocated memory was 140.0 MB in the beginning and 465.6 MB in the end (delta: 325.6 MB). Free memory was 102.9 MB in the beginning and 216.8 MB in the end (delta: -114.0 MB). Peak memory consumption was 211.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:02:35,991 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 03:02:35,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.06 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:02:35,992 INFO L168 Benchmark]: Boogie Preprocessor took 134.95 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 183.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-22 03:02:35,993 INFO L168 Benchmark]: RCFGBuilder took 239.34 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 171.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:02:35,994 INFO L168 Benchmark]: TraceAbstraction took 23318.65 ms. Allocated memory was 203.9 MB in the beginning and 465.6 MB in the end (delta: 261.6 MB). Free memory was 170.9 MB in the beginning and 216.8 MB in the end (delta: -45.9 MB). Peak memory consumption was 215.7 MB. Max. memory is 7.1 GB. [2020-08-22 03:02:35,996 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.06 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.95 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 183.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.34 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 171.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23318.65 ms. Allocated memory was 203.9 MB in the beginning and 465.6 MB in the end (delta: 261.6 MB). Free memory was 170.9 MB in the beginning and 216.8 MB in the end (delta: -45.9 MB). Peak memory consumption was 215.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.2s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 684 SDtfs, 2 SDslu, 14532 SDs, 0 SdLazy, 8656 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 940 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 16.0s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1380 ConstructedInterpolants, 0 QuantifiedInterpolants, 465600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 3800/7600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...