/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:45:06,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:45:06,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:45:06,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:45:06,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:45:06,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:45:06,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:45:06,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:45:06,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:45:06,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:45:06,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:45:06,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:45:06,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:45:06,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:45:06,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:45:06,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:45:06,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:45:06,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:45:06,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:45:06,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:45:06,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:45:06,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:45:06,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:45:06,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:45:06,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:45:06,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:45:06,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:45:06,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:45:06,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:45:06,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 19:45:06,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:45:06,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:45:06,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:45:06,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 19:45:07,012 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:45:07,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:45:07,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:45:07,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:45:07,014 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:45:07,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:45:07,014 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:45:07,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:45:07,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:45:07,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:45:07,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:45:07,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:45:07,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:45:07,015 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:45:07,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:45:07,016 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:45:07,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:45:07,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:45:07,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:45:07,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:45:07,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:45:07,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:45:07,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:45:07,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:45:07,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:45:07,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:45:07,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:45:07,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:45:07,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:45:07,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:45:07,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:45:07,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:45:07,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:45:07,339 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:45:07,339 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:45:07,340 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-08-21 19:45:07,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad63f1135/1f5f2bf88a3b4c789ff7c8bbde748176/FLAG3d5dbe7c6 [2020-08-21 19:45:07,838 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:45:07,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-08-21 19:45:07,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad63f1135/1f5f2bf88a3b4c789ff7c8bbde748176/FLAG3d5dbe7c6 [2020-08-21 19:45:08,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad63f1135/1f5f2bf88a3b4c789ff7c8bbde748176 [2020-08-21 19:45:08,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:45:08,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:45:08,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:08,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:45:08,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:45:08,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd0a692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08, skipping insertion in model container [2020-08-21 19:45:08,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:45:08,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:45:08,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:08,456 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:45:08,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:08,482 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:45:08,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08 WrapperNode [2020-08-21 19:45:08,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:08,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:45:08,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:45:08,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:45:08,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (1/1) ... [2020-08-21 19:45:08,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:45:08,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:45:08,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:45:08,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:45:08,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:45:08,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:45:08,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:45:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-21 19:45:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:45:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:45:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-21 19:45:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:45:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:45:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:45:08,817 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:45:08,817 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 19:45:08,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:08 BoogieIcfgContainer [2020-08-21 19:45:08,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:45:08,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:45:08,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:45:08,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:45:08,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:45:08" (1/3) ... [2020-08-21 19:45:08,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155460f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:08, skipping insertion in model container [2020-08-21 19:45:08,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:08" (2/3) ... [2020-08-21 19:45:08,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155460f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:08, skipping insertion in model container [2020-08-21 19:45:08,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:08" (3/3) ... [2020-08-21 19:45:08,831 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-08-21 19:45:08,843 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:45:08,852 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:45:08,871 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:45:08,947 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:45:08,948 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:45:08,948 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:45:08,948 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:45:08,948 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:45:08,948 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:45:08,949 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:45:08,949 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:45:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 19:45:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 19:45:09,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:09,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:09,009 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-21 19:45:09,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:09,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132649004] [2020-08-21 19:45:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:09,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132649004] [2020-08-21 19:45:09,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:09,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:45:09,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504647301] [2020-08-21 19:45:09,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:45:09,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:45:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:45:09,320 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 19:45:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:09,409 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 19:45:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:45:09,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 19:45:09,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:09,423 INFO L225 Difference]: With dead ends: 30 [2020-08-21 19:45:09,423 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 19:45:09,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:45:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 19:45:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 19:45:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 19:45:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 19:45:09,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 19:45:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:09,476 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 19:45:09,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:45:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 19:45:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:09,478 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:09,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:09,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:45:09,479 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-21 19:45:09,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:09,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26967268] [2020-08-21 19:45:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 19:45:09,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26967268] [2020-08-21 19:45:09,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:09,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 19:45:09,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927000005] [2020-08-21 19:45:09,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:45:09,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:45:09,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:45:09,608 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 19:45:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:09,674 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 19:45:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:45:09,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 19:45:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:09,676 INFO L225 Difference]: With dead ends: 25 [2020-08-21 19:45:09,677 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 19:45:09,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:45:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 19:45:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 19:45:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 19:45:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 19:45:09,686 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 19:45:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:09,686 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 19:45:09,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:45:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 19:45:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 19:45:09,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:09,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:09,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:45:09,689 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-21 19:45:09,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:09,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748609635] [2020-08-21 19:45:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 19:45:09,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748609635] [2020-08-21 19:45:09,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:09,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 19:45:09,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388212520] [2020-08-21 19:45:09,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:45:09,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:45:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:45:09,862 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 19:45:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:09,958 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 19:45:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:45:09,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 19:45:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:09,961 INFO L225 Difference]: With dead ends: 28 [2020-08-21 19:45:09,961 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 19:45:09,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:45:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 19:45:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 19:45:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 19:45:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 19:45:09,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 19:45:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:09,976 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 19:45:09,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:45:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 19:45:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 19:45:09,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:09,977 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:09,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:45:09,978 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:09,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-21 19:45:09,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:09,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231329372] [2020-08-21 19:45:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 19:45:10,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231329372] [2020-08-21 19:45:10,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:10,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 19:45:10,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767266612] [2020-08-21 19:45:10,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:45:10,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:10,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:45:10,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:45:10,188 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 19:45:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:10,314 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 19:45:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 19:45:10,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 19:45:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:10,317 INFO L225 Difference]: With dead ends: 31 [2020-08-21 19:45:10,317 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 19:45:10,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:45:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 19:45:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 19:45:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 19:45:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 19:45:10,332 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 19:45:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:10,337 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 19:45:10,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:45:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 19:45:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 19:45:10,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:10,339 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:10,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:45:10,339 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-21 19:45:10,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:10,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187345009] [2020-08-21 19:45:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 19:45:10,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187345009] [2020-08-21 19:45:10,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:10,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 19:45:10,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075841527] [2020-08-21 19:45:10,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:45:10,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:45:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:45:10,614 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 19:45:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:10,708 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 19:45:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:45:10,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 19:45:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:10,710 INFO L225 Difference]: With dead ends: 34 [2020-08-21 19:45:10,710 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 19:45:10,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:45:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 19:45:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 19:45:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 19:45:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 19:45:10,718 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 19:45:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:10,719 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 19:45:10,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:45:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 19:45:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 19:45:10,721 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:10,721 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:10,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:45:10,721 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-21 19:45:10,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:10,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304162648] [2020-08-21 19:45:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 19:45:10,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304162648] [2020-08-21 19:45:10,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:10,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:45:10,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361217822] [2020-08-21 19:45:10,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:45:10,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:10,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:45:10,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:45:10,943 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 19:45:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:11,035 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 19:45:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:45:11,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 19:45:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:11,037 INFO L225 Difference]: With dead ends: 37 [2020-08-21 19:45:11,037 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 19:45:11,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 19:45:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 19:45:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 19:45:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 19:45:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 19:45:11,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 19:45:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:11,044 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 19:45:11,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:45:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 19:45:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 19:45:11,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:11,046 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:11,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:45:11,047 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:11,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-21 19:45:11,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:11,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161626264] [2020-08-21 19:45:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 19:45:11,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161626264] [2020-08-21 19:45:11,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:11,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:45:11,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559494031] [2020-08-21 19:45:11,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:45:11,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:11,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:45:11,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:45:11,288 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 19:45:11,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:11,388 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 19:45:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 19:45:11,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 19:45:11,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:11,390 INFO L225 Difference]: With dead ends: 40 [2020-08-21 19:45:11,390 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 19:45:11,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-21 19:45:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 19:45:11,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 19:45:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 19:45:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 19:45:11,397 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 19:45:11,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:11,398 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 19:45:11,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:45:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 19:45:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 19:45:11,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:11,399 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:11,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:45:11,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:11,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-21 19:45:11,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:11,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116731388] [2020-08-21 19:45:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 19:45:11,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116731388] [2020-08-21 19:45:11,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:11,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 19:45:11,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465492464] [2020-08-21 19:45:11,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 19:45:11,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 19:45:11,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:45:11,633 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 19:45:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:11,783 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 19:45:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:45:11,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 19:45:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:11,785 INFO L225 Difference]: With dead ends: 43 [2020-08-21 19:45:11,785 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 19:45:11,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-21 19:45:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 19:45:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 19:45:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 19:45:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 19:45:11,793 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 19:45:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:11,793 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 19:45:11,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 19:45:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 19:45:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 19:45:11,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:11,795 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:11,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:45:11,795 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:11,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-21 19:45:11,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:11,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059045819] [2020-08-21 19:45:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:11,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 19:45:12,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059045819] [2020-08-21 19:45:12,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:12,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 19:45:12,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154242465] [2020-08-21 19:45:12,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 19:45:12,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 19:45:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:45:12,171 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 19:45:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:12,307 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 19:45:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 19:45:12,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 19:45:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:12,309 INFO L225 Difference]: With dead ends: 46 [2020-08-21 19:45:12,309 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 19:45:12,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 19:45:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 19:45:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 19:45:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 19:45:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 19:45:12,316 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 19:45:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:12,317 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 19:45:12,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 19:45:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 19:45:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 19:45:12,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:12,318 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:12,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:45:12,319 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-21 19:45:12,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:12,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894765826] [2020-08-21 19:45:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 19:45:12,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894765826] [2020-08-21 19:45:12,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:45:12,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 19:45:12,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094862871] [2020-08-21 19:45:12,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 19:45:12,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 19:45:12,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:45:12,660 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 19:45:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:12,804 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 19:45:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 19:45:12,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 19:45:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:12,806 INFO L225 Difference]: With dead ends: 49 [2020-08-21 19:45:12,806 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 19:45:12,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 19:45:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 19:45:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 19:45:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 19:45:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 19:45:12,812 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 19:45:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:12,813 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 19:45:12,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 19:45:12,813 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 19:45:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 19:45:12,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:12,815 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:12,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:45:12,815 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:12,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-21 19:45:12,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:12,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212858856] [2020-08-21 19:45:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 19:45:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:12,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 19:45:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2020-08-21 19:45:13,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212858856] [2020-08-21 19:45:13,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:13,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:45:13,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157227276] [2020-08-21 19:45:13,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:45:13,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:45:13,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:45:13,343 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 8 states. [2020-08-21 19:45:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:13,454 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-08-21 19:45:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 19:45:13,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-21 19:45:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:13,455 INFO L225 Difference]: With dead ends: 45 [2020-08-21 19:45:13,455 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 19:45:13,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:45:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 19:45:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 19:45:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 19:45:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 19:45:13,457 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-08-21 19:45:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:13,458 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 19:45:13,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:45:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 19:45:13,458 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 19:45:13,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:45:13,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 19:45:13,491 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 19:45:13,491 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:45:13,492 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:45:13,492 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 19:45:13,492 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 19:45:13,492 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 19:45:13,492 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-21 19:45:13,492 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-21 19:45:13,493 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-21 19:45:13,493 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-21 19:45:13,493 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-21 19:45:13,493 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-21 19:45:13,493 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-21 19:45:13,493 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-21 19:45:13,494 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-21 19:45:13,494 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-21 19:45:13,494 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-21 19:45:13,494 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 10) (<= 10 main_~a~0)) [2020-08-21 19:45:13,494 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-21 19:45:13,495 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-21 19:45:13,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:45:13 BoogieIcfgContainer [2020-08-21 19:45:13,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:45:13,504 INFO L168 Benchmark]: Toolchain (without parser) took 5240.88 ms. Allocated memory was 138.9 MB in the beginning and 288.9 MB in the end (delta: 149.9 MB). Free memory was 102.0 MB in the beginning and 96.8 MB in the end (delta: 5.1 MB). Peak memory consumption was 155.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:13,504 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 19:45:13,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.27 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:13,506 INFO L168 Benchmark]: Boogie Preprocessor took 23.82 ms. Allocated memory is still 138.9 MB. Free memory was 92.5 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:13,507 INFO L168 Benchmark]: RCFGBuilder took 314.07 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 170.3 MB in the end (delta: -79.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:13,508 INFO L168 Benchmark]: TraceAbstraction took 4677.97 ms. Allocated memory was 201.9 MB in the beginning and 288.9 MB in the end (delta: 87.0 MB). Free memory was 169.6 MB in the beginning and 96.8 MB in the end (delta: 72.8 MB). Peak memory consumption was 159.8 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:13,512 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 220.27 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.82 ms. Allocated memory is still 138.9 MB. Free memory was 92.5 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.07 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 170.3 MB in the end (delta: -79.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4677.97 ms. Allocated memory was 201.9 MB in the beginning and 288.9 MB in the end (delta: 87.0 MB). Free memory was 169.6 MB in the beginning and 96.8 MB in the end (delta: 72.8 MB). Peak memory consumption was 159.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 4.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 165 SDslu, 431 SDs, 0 SdLazy, 340 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 324 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 462 ConstructedInterpolants, 0 QuantifiedInterpolants, 82680 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 760/1210 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...