/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:28:04,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:28:04,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:28:04,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:28:04,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:28:04,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:28:04,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:28:04,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:28:04,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:28:04,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:28:04,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:28:04,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:28:04,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:28:04,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:28:04,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:28:04,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:28:04,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:28:04,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:28:04,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:28:04,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:28:04,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:28:04,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:28:04,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:28:04,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:28:04,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 15:28:04,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 15:28:04,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 15:28:04,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 15:28:04,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 15:28:04,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 15:28:04,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:28:04,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:28:04,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:28:04,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:28:04,915 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:28:04,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:28:04,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:28:04,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:28:04,917 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:28:04,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:28:04,918 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:28:04,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:28:04,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:28:04,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:28:04,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:28:04,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:28:04,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:28:04,919 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:28:04,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:28:04,920 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:28:04,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:28:04,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:28:04,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:28:04,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:28:04,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:28:04,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:04,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:28:04,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:28:04,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:28:04,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:28:04,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:28:04,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:28:04,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:28:04,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 15:28:05,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:28:05,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:28:05,284 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:28:05,287 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:28:05,288 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:28:05,288 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-08-18 15:28:05,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc567f495/ea87a7a8f67b4a928612c0607b97f664/FLAG68d356f76 [2020-08-18 15:28:05,855 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:28:05,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-08-18 15:28:05,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc567f495/ea87a7a8f67b4a928612c0607b97f664/FLAG68d356f76 [2020-08-18 15:28:06,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc567f495/ea87a7a8f67b4a928612c0607b97f664 [2020-08-18 15:28:06,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:28:06,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:28:06,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:06,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:28:06,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:28:06,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c28f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06, skipping insertion in model container [2020-08-18 15:28:06,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:28:06,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:28:06,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:06,384 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:28:06,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:06,409 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:28:06,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06 WrapperNode [2020-08-18 15:28:06,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:06,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:28:06,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:28:06,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:28:06,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (1/1) ... [2020-08-18 15:28:06,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:28:06,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:28:06,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:28:06,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:28:06,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:28:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:28:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 15:28:06,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:28:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:28:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:28:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 15:28:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:28:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:28:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:28:06,751 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:28:06,751 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 15:28:06,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:06 BoogieIcfgContainer [2020-08-18 15:28:06,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:28:06,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:28:06,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:28:06,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:28:06,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:28:06" (1/3) ... [2020-08-18 15:28:06,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c6d5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:06, skipping insertion in model container [2020-08-18 15:28:06,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:06" (2/3) ... [2020-08-18 15:28:06,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c6d5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:06, skipping insertion in model container [2020-08-18 15:28:06,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:06" (3/3) ... [2020-08-18 15:28:06,763 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2020-08-18 15:28:06,771 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:28:06,777 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:28:06,792 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:28:06,817 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:28:06,817 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:28:06,817 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:28:06,818 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:28:06,818 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:28:06,818 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:28:06,818 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:28:06,818 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:28:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 15:28:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 15:28:06,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:06,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:06,846 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:06,852 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 15:28:06,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:06,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468974002] [2020-08-18 15:28:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:07,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468974002] [2020-08-18 15:28:07,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:07,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:28:07,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576467413] [2020-08-18 15:28:07,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:28:07,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:07,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:28:07,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:28:07,080 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 15:28:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:07,204 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 15:28:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:28:07,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 15:28:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:07,217 INFO L225 Difference]: With dead ends: 30 [2020-08-18 15:28:07,217 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 15:28:07,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:28:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 15:28:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 15:28:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 15:28:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 15:28:07,279 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 15:28:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:07,280 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 15:28:07,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:28:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 15:28:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:28:07,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:07,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:07,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:28:07,283 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:07,284 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 15:28:07,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:07,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851730777] [2020-08-18 15:28:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 15:28:07,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851730777] [2020-08-18 15:28:07,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:07,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 15:28:07,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821742254] [2020-08-18 15:28:07,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:28:07,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:28:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:28:07,413 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 15:28:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:07,486 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 15:28:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:28:07,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 15:28:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:07,488 INFO L225 Difference]: With dead ends: 25 [2020-08-18 15:28:07,489 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 15:28:07,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:28:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 15:28:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 15:28:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 15:28:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 15:28:07,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 15:28:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:07,498 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 15:28:07,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:28:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 15:28:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 15:28:07,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:07,500 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:07,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:28:07,500 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:07,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 15:28:07,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:07,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878836997] [2020-08-18 15:28:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 15:28:07,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878836997] [2020-08-18 15:28:07,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:07,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:28:07,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103158817] [2020-08-18 15:28:07,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:28:07,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:28:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:28:07,672 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 15:28:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:07,738 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 15:28:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:28:07,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 15:28:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:07,740 INFO L225 Difference]: With dead ends: 28 [2020-08-18 15:28:07,740 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 15:28:07,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:28:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 15:28:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 15:28:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 15:28:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 15:28:07,748 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 15:28:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:07,749 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 15:28:07,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:28:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 15:28:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 15:28:07,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:07,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:07,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:28:07,751 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 15:28:07,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:07,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983442182] [2020-08-18 15:28:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 15:28:07,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983442182] [2020-08-18 15:28:07,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:07,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:28:07,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358749162] [2020-08-18 15:28:07,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:28:07,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:28:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:28:07,957 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 15:28:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:08,052 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 15:28:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:28:08,053 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 15:28:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:08,055 INFO L225 Difference]: With dead ends: 31 [2020-08-18 15:28:08,055 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 15:28:08,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:28:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 15:28:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 15:28:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 15:28:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 15:28:08,063 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 15:28:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:08,063 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 15:28:08,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:28:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 15:28:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 15:28:08,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:08,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:08,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:28:08,066 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 15:28:08,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:08,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002660493] [2020-08-18 15:28:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 15:28:08,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002660493] [2020-08-18 15:28:08,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:08,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:28:08,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537179001] [2020-08-18 15:28:08,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:28:08,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:08,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:28:08,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:28:08,233 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 15:28:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:08,318 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 15:28:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:28:08,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 15:28:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:08,320 INFO L225 Difference]: With dead ends: 34 [2020-08-18 15:28:08,320 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 15:28:08,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:28:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 15:28:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 15:28:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:28:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 15:28:08,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 15:28:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:08,329 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 15:28:08,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:28:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 15:28:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 15:28:08,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:08,331 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:08,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:28:08,331 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:08,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 15:28:08,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:08,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032899365] [2020-08-18 15:28:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 15:28:08,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032899365] [2020-08-18 15:28:08,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:08,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:28:08,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196233554] [2020-08-18 15:28:08,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:28:08,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:28:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:28:08,510 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 15:28:08,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:08,598 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 15:28:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:28:08,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 15:28:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:08,600 INFO L225 Difference]: With dead ends: 37 [2020-08-18 15:28:08,600 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 15:28:08,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 15:28:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 15:28:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 15:28:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 15:28:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 15:28:08,608 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 15:28:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:08,608 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 15:28:08,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:28:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 15:28:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 15:28:08,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:08,610 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:08,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:28:08,611 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 15:28:08,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:08,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541087951] [2020-08-18 15:28:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 15:28:08,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541087951] [2020-08-18 15:28:08,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:08,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:28:08,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759336388] [2020-08-18 15:28:08,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:28:08,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:28:08,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:28:08,825 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 15:28:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:08,931 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 15:28:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:28:08,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 15:28:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:08,934 INFO L225 Difference]: With dead ends: 40 [2020-08-18 15:28:08,934 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 15:28:08,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:28:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 15:28:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 15:28:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 15:28:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 15:28:08,941 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 15:28:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:08,942 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 15:28:08,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:28:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 15:28:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 15:28:08,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:08,943 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:08,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:28:08,944 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 15:28:08,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:08,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633637747] [2020-08-18 15:28:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 15:28:09,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633637747] [2020-08-18 15:28:09,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:09,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 15:28:09,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688506243] [2020-08-18 15:28:09,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 15:28:09,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 15:28:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:28:09,159 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 15:28:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:09,279 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 15:28:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 15:28:09,279 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 15:28:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:09,281 INFO L225 Difference]: With dead ends: 43 [2020-08-18 15:28:09,281 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 15:28:09,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-18 15:28:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 15:28:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 15:28:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 15:28:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 15:28:09,288 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 15:28:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:09,289 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 15:28:09,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 15:28:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 15:28:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 15:28:09,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:09,291 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:09,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:28:09,291 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:09,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 15:28:09,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:09,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502873532] [2020-08-18 15:28:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 15:28:09,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502873532] [2020-08-18 15:28:09,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:09,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 15:28:09,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180982027] [2020-08-18 15:28:09,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 15:28:09,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:09,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 15:28:09,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:28:09,568 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 15:28:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:09,707 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 15:28:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 15:28:09,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 15:28:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:09,710 INFO L225 Difference]: With dead ends: 46 [2020-08-18 15:28:09,710 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 15:28:09,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-18 15:28:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 15:28:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 15:28:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 15:28:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 15:28:09,718 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 15:28:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:09,719 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 15:28:09,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 15:28:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 15:28:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 15:28:09,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:09,721 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:09,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:28:09,721 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:09,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 15:28:09,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:09,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561845942] [2020-08-18 15:28:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:09,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 15:28:10,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561845942] [2020-08-18 15:28:10,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:10,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 15:28:10,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530551902] [2020-08-18 15:28:10,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 15:28:10,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:10,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 15:28:10,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:28:10,040 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 15:28:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:10,189 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 15:28:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 15:28:10,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 15:28:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:10,191 INFO L225 Difference]: With dead ends: 49 [2020-08-18 15:28:10,191 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 15:28:10,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 15:28:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 15:28:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 15:28:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 15:28:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 15:28:10,198 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 15:28:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:10,199 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 15:28:10,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 15:28:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 15:28:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 15:28:10,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:10,200 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:10,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:28:10,201 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:10,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:10,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 15:28:10,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:10,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158372325] [2020-08-18 15:28:10,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 15:28:10,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158372325] [2020-08-18 15:28:10,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:10,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 15:28:10,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264570975] [2020-08-18 15:28:10,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 15:28:10,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 15:28:10,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 15:28:10,557 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 15:28:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:10,734 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 15:28:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 15:28:10,734 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 15:28:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:10,736 INFO L225 Difference]: With dead ends: 52 [2020-08-18 15:28:10,736 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 15:28:10,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-18 15:28:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 15:28:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 15:28:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 15:28:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 15:28:10,751 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 15:28:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:10,754 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 15:28:10,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 15:28:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 15:28:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 15:28:10,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:10,756 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:10,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:28:10,757 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-18 15:28:10,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:10,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468108408] [2020-08-18 15:28:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:10,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 15:28:11,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468108408] [2020-08-18 15:28:11,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:11,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 15:28:11,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322896404] [2020-08-18 15:28:11,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 15:28:11,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 15:28:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 15:28:11,211 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 15:28:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:11,384 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 15:28:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 15:28:11,385 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 15:28:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:11,386 INFO L225 Difference]: With dead ends: 55 [2020-08-18 15:28:11,386 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 15:28:11,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-18 15:28:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 15:28:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 15:28:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 15:28:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 15:28:11,402 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 15:28:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:11,403 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 15:28:11,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 15:28:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 15:28:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 15:28:11,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:11,406 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:11,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:28:11,409 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:11,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-18 15:28:11,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:11,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55611582] [2020-08-18 15:28:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:11,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 15:28:12,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55611582] [2020-08-18 15:28:12,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:12,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 15:28:12,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366397631] [2020-08-18 15:28:12,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 15:28:12,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:12,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 15:28:12,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 15:28:12,050 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 15:28:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:12,245 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 15:28:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 15:28:12,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 15:28:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:12,247 INFO L225 Difference]: With dead ends: 58 [2020-08-18 15:28:12,247 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 15:28:12,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-18 15:28:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 15:28:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 15:28:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 15:28:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 15:28:12,254 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 15:28:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:12,255 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 15:28:12,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 15:28:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 15:28:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 15:28:12,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:12,256 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:12,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:28:12,257 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-18 15:28:12,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:12,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755352180] [2020-08-18 15:28:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 15:28:12,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755352180] [2020-08-18 15:28:12,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:12,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 15:28:12,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951852178] [2020-08-18 15:28:12,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 15:28:12,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:12,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 15:28:12,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:28:12,702 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 15:28:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:12,903 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 15:28:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 15:28:12,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 15:28:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:12,904 INFO L225 Difference]: With dead ends: 61 [2020-08-18 15:28:12,905 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 15:28:12,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-18 15:28:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 15:28:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 15:28:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 15:28:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 15:28:12,912 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 15:28:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:12,912 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 15:28:12,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 15:28:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 15:28:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 15:28:12,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:12,913 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:12,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:28:12,914 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:12,914 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-18 15:28:12,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:12,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891944830] [2020-08-18 15:28:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:12,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 15:28:13,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891944830] [2020-08-18 15:28:13,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:13,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 15:28:13,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878587730] [2020-08-18 15:28:13,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 15:28:13,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 15:28:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:28:13,445 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 15:28:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:13,674 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 15:28:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 15:28:13,675 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 15:28:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:13,676 INFO L225 Difference]: With dead ends: 64 [2020-08-18 15:28:13,676 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 15:28:13,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 15:28:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 15:28:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 15:28:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 15:28:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 15:28:13,690 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 15:28:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:13,691 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 15:28:13,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 15:28:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 15:28:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 15:28:13,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:13,694 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:13,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 15:28:13,694 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:13,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-18 15:28:13,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:13,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263077092] [2020-08-18 15:28:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:13,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 15:28:14,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263077092] [2020-08-18 15:28:14,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:14,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 15:28:14,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798214797] [2020-08-18 15:28:14,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 15:28:14,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:14,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 15:28:14,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 15:28:14,330 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-18 15:28:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:14,556 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 15:28:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 15:28:14,557 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-18 15:28:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:14,561 INFO L225 Difference]: With dead ends: 67 [2020-08-18 15:28:14,561 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 15:28:14,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 15:28:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 15:28:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 15:28:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 15:28:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 15:28:14,568 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 15:28:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:14,572 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 15:28:14,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 15:28:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 15:28:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 15:28:14,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:14,574 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:14,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 15:28:14,574 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-18 15:28:14,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:14,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982630263] [2020-08-18 15:28:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:14,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 15:28:15,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982630263] [2020-08-18 15:28:15,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:15,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 15:28:15,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698042716] [2020-08-18 15:28:15,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 15:28:15,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:15,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 15:28:15,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:28:15,326 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-18 15:28:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:15,560 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 15:28:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 15:28:15,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-18 15:28:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:15,568 INFO L225 Difference]: With dead ends: 70 [2020-08-18 15:28:15,568 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 15:28:15,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 15:28:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 15:28:15,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 15:28:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 15:28:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 15:28:15,580 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 15:28:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:15,581 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 15:28:15,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 15:28:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 15:28:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 15:28:15,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:15,582 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:15,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 15:28:15,583 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-18 15:28:15,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:15,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883136321] [2020-08-18 15:28:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:15,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 15:28:16,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883136321] [2020-08-18 15:28:16,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:16,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 15:28:16,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68044681] [2020-08-18 15:28:16,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 15:28:16,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:16,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 15:28:16,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 15:28:16,437 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-18 15:28:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:16,728 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 15:28:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 15:28:16,729 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-18 15:28:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:16,730 INFO L225 Difference]: With dead ends: 73 [2020-08-18 15:28:16,730 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 15:28:16,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 15:28:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 15:28:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 15:28:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 15:28:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 15:28:16,741 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 15:28:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:16,742 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 15:28:16,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 15:28:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 15:28:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 15:28:16,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:16,745 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:16,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 15:28:16,746 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-18 15:28:16,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:16,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281512813] [2020-08-18 15:28:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:16,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 15:28:17,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281512813] [2020-08-18 15:28:17,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:17,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 15:28:17,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849949584] [2020-08-18 15:28:17,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 15:28:17,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:17,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 15:28:17,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 15:28:17,689 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-18 15:28:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:17,974 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 15:28:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 15:28:17,975 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-18 15:28:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:17,976 INFO L225 Difference]: With dead ends: 76 [2020-08-18 15:28:17,976 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 15:28:17,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 15:28:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 15:28:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 15:28:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 15:28:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 15:28:17,986 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 15:28:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:17,987 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 15:28:17,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 15:28:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 15:28:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 15:28:17,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:17,989 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:17,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 15:28:17,989 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:17,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:17,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-18 15:28:17,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:17,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728809061] [2020-08-18 15:28:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 15:28:18,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728809061] [2020-08-18 15:28:18,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:18,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 15:28:18,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735931939] [2020-08-18 15:28:18,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 15:28:18,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 15:28:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 15:28:18,914 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-18 15:28:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:19,191 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 15:28:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 15:28:19,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-18 15:28:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:19,193 INFO L225 Difference]: With dead ends: 79 [2020-08-18 15:28:19,193 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 15:28:19,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 15:28:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 15:28:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 15:28:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 15:28:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 15:28:19,199 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 15:28:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:19,199 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 15:28:19,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 15:28:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 15:28:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 15:28:19,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:19,201 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:19,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 15:28:19,201 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-18 15:28:19,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:19,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006261646] [2020-08-18 15:28:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:19,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-18 15:28:20,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006261646] [2020-08-18 15:28:20,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:20,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 15:28:20,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145370307] [2020-08-18 15:28:20,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 15:28:20,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:20,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 15:28:20,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-18 15:28:20,048 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2020-08-18 15:28:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:20,377 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-18 15:28:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 15:28:20,379 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2020-08-18 15:28:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:20,380 INFO L225 Difference]: With dead ends: 82 [2020-08-18 15:28:20,380 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 15:28:20,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 15:28:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 15:28:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-18 15:28:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 15:28:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-18 15:28:20,386 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-18 15:28:20,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:20,387 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-18 15:28:20,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 15:28:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-18 15:28:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-18 15:28:20,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:20,390 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:20,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 15:28:20,390 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:20,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-18 15:28:20,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:20,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968390378] [2020-08-18 15:28:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:20,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-18 15:28:21,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968390378] [2020-08-18 15:28:21,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:21,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 15:28:21,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636053149] [2020-08-18 15:28:21,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 15:28:21,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:21,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 15:28:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-18 15:28:21,595 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-18 15:28:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:21,932 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-18 15:28:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 15:28:21,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-18 15:28:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:21,935 INFO L225 Difference]: With dead ends: 85 [2020-08-18 15:28:21,935 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 15:28:21,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 15:28:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 15:28:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-18 15:28:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 15:28:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-18 15:28:21,945 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-18 15:28:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:21,945 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-18 15:28:21,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 15:28:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-18 15:28:21,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-18 15:28:21,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:21,947 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:21,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 15:28:21,947 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:21,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-18 15:28:21,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:21,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299261171] [2020-08-18 15:28:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:21,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-18 15:28:22,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299261171] [2020-08-18 15:28:22,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:22,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 15:28:22,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679530047] [2020-08-18 15:28:22,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 15:28:22,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:22,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 15:28:22,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-18 15:28:22,968 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2020-08-18 15:28:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:23,357 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-18 15:28:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 15:28:23,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-08-18 15:28:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:23,359 INFO L225 Difference]: With dead ends: 88 [2020-08-18 15:28:23,359 INFO L226 Difference]: Without dead ends: 84 [2020-08-18 15:28:23,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 15:28:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-18 15:28:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-18 15:28:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 15:28:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-18 15:28:23,364 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-18 15:28:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:23,365 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-18 15:28:23,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 15:28:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-18 15:28:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 15:28:23,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:23,367 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:23,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 15:28:23,367 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:23,368 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-18 15:28:23,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:23,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765839788] [2020-08-18 15:28:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:23,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-18 15:28:24,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765839788] [2020-08-18 15:28:24,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:24,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 15:28:24,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058282414] [2020-08-18 15:28:24,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 15:28:24,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 15:28:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-18 15:28:24,605 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2020-08-18 15:28:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:25,002 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-18 15:28:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 15:28:25,003 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-08-18 15:28:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:25,004 INFO L225 Difference]: With dead ends: 91 [2020-08-18 15:28:25,004 INFO L226 Difference]: Without dead ends: 87 [2020-08-18 15:28:25,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-18 15:28:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-18 15:28:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-18 15:28:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 15:28:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-18 15:28:25,009 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-18 15:28:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:25,010 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-18 15:28:25,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 15:28:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-18 15:28:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 15:28:25,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:25,012 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:25,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 15:28:25,012 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:25,012 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-18 15:28:25,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:25,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686029096] [2020-08-18 15:28:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:25,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-18 15:28:26,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686029096] [2020-08-18 15:28:26,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:26,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 15:28:26,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454424324] [2020-08-18 15:28:26,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 15:28:26,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:26,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 15:28:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-18 15:28:26,131 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2020-08-18 15:28:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:26,545 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-18 15:28:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 15:28:26,546 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-08-18 15:28:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:26,547 INFO L225 Difference]: With dead ends: 94 [2020-08-18 15:28:26,548 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 15:28:26,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 15:28:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 15:28:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-18 15:28:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 15:28:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-18 15:28:26,553 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-18 15:28:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:26,554 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-18 15:28:26,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 15:28:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-18 15:28:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-18 15:28:26,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:26,556 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:26,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 15:28:26,556 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-18 15:28:26,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:26,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716698566] [2020-08-18 15:28:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:26,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:27,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:28,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-18 15:28:29,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716698566] [2020-08-18 15:28:29,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:29,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-18 15:28:29,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207697796] [2020-08-18 15:28:29,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-18 15:28:29,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:29,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-18 15:28:29,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 15:28:29,605 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-18 15:28:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:30,998 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-18 15:28:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-18 15:28:30,998 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-18 15:28:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:31,000 INFO L225 Difference]: With dead ends: 97 [2020-08-18 15:28:31,000 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 15:28:31,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-18 15:28:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 15:28:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-18 15:28:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 15:28:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-18 15:28:31,008 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-18 15:28:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:31,009 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-18 15:28:31,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-18 15:28:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-18 15:28:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-18 15:28:31,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:31,010 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:31,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 15:28:31,010 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-18 15:28:31,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:31,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880962622] [2020-08-18 15:28:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:31,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-18 15:28:32,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880962622] [2020-08-18 15:28:32,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:32,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 15:28:32,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978543552] [2020-08-18 15:28:32,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 15:28:32,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 15:28:32,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-18 15:28:32,647 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 31 states. [2020-08-18 15:28:33,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:33,326 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-08-18 15:28:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 15:28:33,327 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2020-08-18 15:28:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:33,328 INFO L225 Difference]: With dead ends: 93 [2020-08-18 15:28:33,328 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:28:33,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1142, Invalid=2164, Unknown=0, NotChecked=0, Total=3306 [2020-08-18 15:28:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:28:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:28:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:28:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:28:33,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2020-08-18 15:28:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:33,330 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:28:33,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 15:28:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:28:33,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:28:33,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 15:28:33,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:28:33,362 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 15:28:33,362 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:28:33,362 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:28:33,362 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 15:28:33,362 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 15:28:33,362 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 15:28:33,363 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-18 15:28:33,363 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-18 15:28:33,363 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-18 15:28:33,363 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-18 15:28:33,364 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-18 15:28:33,364 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 25 main_~input~0) (<= main_~input~0 25)) [2020-08-18 15:28:33,364 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-18 15:28:33,364 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-18 15:28:33,364 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-18 15:28:33,364 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-18 15:28:33,365 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-18 15:28:33,365 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-18 15:28:33,365 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 15:28:33,365 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-18 15:28:33,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:28:33 BoogieIcfgContainer [2020-08-18 15:28:33,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:28:33,381 INFO L168 Benchmark]: Toolchain (without parser) took 27193.03 ms. Allocated memory was 147.8 MB in the beginning and 619.2 MB in the end (delta: 471.3 MB). Free memory was 104.5 MB in the beginning and 260.0 MB in the end (delta: -155.5 MB). Peak memory consumption was 315.8 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:33,381 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-18 15:28:33,382 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.83 ms. Allocated memory is still 147.8 MB. Free memory was 104.3 MB in the beginning and 95.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:33,382 INFO L168 Benchmark]: Boogie Preprocessor took 27.11 ms. Allocated memory is still 147.8 MB. Free memory was 95.0 MB in the beginning and 93.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:33,383 INFO L168 Benchmark]: RCFGBuilder took 317.19 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.7 MB in the beginning and 171.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:33,383 INFO L168 Benchmark]: TraceAbstraction took 26621.25 ms. Allocated memory was 203.9 MB in the beginning and 619.2 MB in the end (delta: 415.2 MB). Free memory was 171.7 MB in the beginning and 260.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 327.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:33,386 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.83 ms. Allocated memory is still 147.8 MB. Free memory was 104.3 MB in the beginning and 95.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.11 ms. Allocated memory is still 147.8 MB. Free memory was 95.0 MB in the beginning and 93.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.19 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.7 MB in the beginning and 171.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26621.25 ms. Allocated memory was 203.9 MB in the beginning and 619.2 MB in the end (delta: 415.2 MB). Free memory was 171.7 MB in the beginning and 260.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 327.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.5s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 455 SDtfs, 782 SDslu, 4695 SDs, 0 SdLazy, 3193 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1647 GetRequests, 838 SyntacticMatches, 0 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 17.8s InterpolantComputationTime, 2457 NumberOfCodeBlocks, 2457 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 2430 ConstructedInterpolants, 0 QuantifiedInterpolants, 744336 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 1 PerfectInterpolantSequences, 10452/18954 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...