/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:59:48,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:59:48,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:59:48,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:59:48,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:59:48,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:59:48,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:59:48,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:59:48,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:59:48,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:59:48,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:59:48,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:59:48,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:59:48,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:59:48,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:59:48,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:59:48,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:59:48,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:59:48,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:59:48,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:59:48,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:59:48,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:59:48,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:59:48,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:59:48,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:59:48,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:59:48,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:59:48,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:59:48,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:59:48,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:59:48,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:59:48,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:59:48,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:59:48,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:59:48,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:59:48,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:59:48,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:59:48,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:59:48,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:59:48,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:59:48,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:59:48,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 03:59:48,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:59:48,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:59:48,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:59:48,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:59:48,934 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:59:48,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:59:48,934 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:59:48,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:59:48,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:59:48,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:59:48,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:59:48,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:59:48,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:59:48,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:59:48,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:59:48,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:59:48,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:59:48,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:59:48,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:59:48,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:59:48,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:59:48,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:59:48,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:59:48,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:59:48,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:59:48,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:59:48,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:59:48,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:59:48,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:59:48,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:59:49,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:59:49,250 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:59:49,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:59:49,255 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:59:49,255 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:59:49,256 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-22 03:59:49,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4857fdc35/b98b54da2b5644c38fc94ce2a3027fe6/FLAG1f4c2f571 [2020-08-22 03:59:49,762 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:59:49,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-22 03:59:49,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4857fdc35/b98b54da2b5644c38fc94ce2a3027fe6/FLAG1f4c2f571 [2020-08-22 03:59:50,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4857fdc35/b98b54da2b5644c38fc94ce2a3027fe6 [2020-08-22 03:59:50,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:59:50,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:59:50,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:59:50,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:59:50,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:59:50,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d6133a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50, skipping insertion in model container [2020-08-22 03:59:50,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:59:50,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:59:50,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:59:50,363 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:59:50,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:59:50,401 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:59:50,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50 WrapperNode [2020-08-22 03:59:50,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:59:50,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:59:50,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:59:50,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:59:50,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (1/1) ... [2020-08-22 03:59:50,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:59:50,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:59:50,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:59:50,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:59:50,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:59:50,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:59:50,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:59:50,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 03:59:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:59:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:59:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 03:59:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:59:50,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:59:50,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:59:50,879 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:59:50,879 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 03:59:50,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:59:50 BoogieIcfgContainer [2020-08-22 03:59:50,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:59:50,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:59:50,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:59:50,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:59:50,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:59:50" (1/3) ... [2020-08-22 03:59:50,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c11a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:59:50, skipping insertion in model container [2020-08-22 03:59:50,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:59:50" (2/3) ... [2020-08-22 03:59:50,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c11a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:59:50, skipping insertion in model container [2020-08-22 03:59:50,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:59:50" (3/3) ... [2020-08-22 03:59:50,891 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-08-22 03:59:50,902 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:59:50,911 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:59:50,923 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:59:50,943 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:59:50,943 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:59:50,943 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:59:50,943 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:59:50,944 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:59:50,944 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:59:50,944 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:59:50,944 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:59:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 03:59:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 03:59:50,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:50,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:50,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:50,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-08-22 03:59:50,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:50,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964929706] [2020-08-22 03:59:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:51,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964929706] [2020-08-22 03:59:51,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:59:51,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 03:59:51,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674608634] [2020-08-22 03:59:51,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 03:59:51,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 03:59:51,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 03:59:51,144 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-22 03:59:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:51,165 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2020-08-22 03:59:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 03:59:51,167 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 03:59:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:51,177 INFO L225 Difference]: With dead ends: 49 [2020-08-22 03:59:51,177 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 03:59:51,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 03:59:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 03:59:51,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 03:59:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 03:59:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-22 03:59:51,220 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-08-22 03:59:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:51,221 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-22 03:59:51,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 03:59:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-22 03:59:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 03:59:51,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:51,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:51,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:59:51,223 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:51,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:51,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2031885466, now seen corresponding path program 1 times [2020-08-22 03:59:51,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:51,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630703517] [2020-08-22 03:59:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:51,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630703517] [2020-08-22 03:59:51,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:59:51,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:59:51,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947852251] [2020-08-22 03:59:51,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:59:51,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:51,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:59:51,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:59:51,360 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-08-22 03:59:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:51,392 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-22 03:59:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:59:51,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-08-22 03:59:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:51,394 INFO L225 Difference]: With dead ends: 48 [2020-08-22 03:59:51,394 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 03:59:51,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:59:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 03:59:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-08-22 03:59:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 03:59:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-22 03:59:51,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-08-22 03:59:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:51,404 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-22 03:59:51,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:59:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-22 03:59:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 03:59:51,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:51,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:51,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:59:51,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-08-22 03:59:51,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:51,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487092469] [2020-08-22 03:59:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:51,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487092469] [2020-08-22 03:59:51,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:51,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 03:59:51,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014184554] [2020-08-22 03:59:51,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:59:51,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:51,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:59:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:59:51,525 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-08-22 03:59:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:51,559 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-08-22 03:59:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:59:51,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-22 03:59:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:51,561 INFO L225 Difference]: With dead ends: 51 [2020-08-22 03:59:51,561 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 03:59:51,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:59:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 03:59:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-08-22 03:59:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 03:59:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-22 03:59:51,569 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-08-22 03:59:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:51,570 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-22 03:59:51,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:59:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-22 03:59:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:59:51,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:51,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:51,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:59:51,572 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:51,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:51,572 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-08-22 03:59:51,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:51,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188739434] [2020-08-22 03:59:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:51,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188739434] [2020-08-22 03:59:51,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:51,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 03:59:51,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915409888] [2020-08-22 03:59:51,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:59:51,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:51,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:59:51,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:59:51,720 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-08-22 03:59:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:51,776 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-22 03:59:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:59:51,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 03:59:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:51,778 INFO L225 Difference]: With dead ends: 55 [2020-08-22 03:59:51,778 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 03:59:51,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:59:51,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 03:59:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-08-22 03:59:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 03:59:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-22 03:59:51,786 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-08-22 03:59:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:51,786 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-22 03:59:51,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:59:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-22 03:59:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:59:51,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:51,788 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:51,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:59:51,788 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:51,789 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-08-22 03:59:51,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:51,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980648599] [2020-08-22 03:59:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:51,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980648599] [2020-08-22 03:59:51,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:51,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 03:59:51,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38352611] [2020-08-22 03:59:51,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:59:51,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:51,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:59:51,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:59:51,909 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-08-22 03:59:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:51,994 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-08-22 03:59:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:59:51,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 03:59:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:51,997 INFO L225 Difference]: With dead ends: 59 [2020-08-22 03:59:51,997 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 03:59:51,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:59:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 03:59:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-08-22 03:59:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 03:59:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-22 03:59:52,005 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-22 03:59:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:52,006 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-22 03:59:52,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:59:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-22 03:59:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:59:52,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:52,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:52,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:59:52,008 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash 924643730, now seen corresponding path program 4 times [2020-08-22 03:59:52,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:52,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179681760] [2020-08-22 03:59:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:52,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:52,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179681760] [2020-08-22 03:59:52,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:52,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:59:52,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878621008] [2020-08-22 03:59:52,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:59:52,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:52,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:59:52,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:59:52,161 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-22 03:59:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:52,222 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-08-22 03:59:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:59:52,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 03:59:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:52,224 INFO L225 Difference]: With dead ends: 63 [2020-08-22 03:59:52,224 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 03:59:52,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:59:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 03:59:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-08-22 03:59:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 03:59:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 03:59:52,232 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 03:59:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:52,232 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 03:59:52,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:59:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 03:59:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:59:52,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:52,234 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:52,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:59:52,234 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash 157361168, now seen corresponding path program 5 times [2020-08-22 03:59:52,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:52,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590890665] [2020-08-22 03:59:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:52,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:52,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590890665] [2020-08-22 03:59:52,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:52,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:59:52,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665204520] [2020-08-22 03:59:52,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:59:52,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:52,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:59:52,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:59:52,419 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-22 03:59:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:52,509 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-22 03:59:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:59:52,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-22 03:59:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:52,511 INFO L225 Difference]: With dead ends: 67 [2020-08-22 03:59:52,511 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 03:59:52,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:59:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 03:59:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-22 03:59:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 03:59:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 03:59:52,522 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-22 03:59:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:52,522 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 03:59:52,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:59:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 03:59:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 03:59:52,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:52,525 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:52,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:59:52,525 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1533193998, now seen corresponding path program 6 times [2020-08-22 03:59:52,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:52,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11362770] [2020-08-22 03:59:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:52,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:52,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11362770] [2020-08-22 03:59:52,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:52,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:59:52,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647303636] [2020-08-22 03:59:52,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:59:52,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:59:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:59:52,667 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-22 03:59:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:52,756 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-08-22 03:59:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:59:52,757 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 03:59:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:52,758 INFO L225 Difference]: With dead ends: 71 [2020-08-22 03:59:52,758 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 03:59:52,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:59:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 03:59:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-08-22 03:59:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 03:59:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 03:59:52,765 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-22 03:59:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:52,766 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 03:59:52,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:59:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 03:59:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:59:52,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:52,767 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:52,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:59:52,768 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash 858616460, now seen corresponding path program 7 times [2020-08-22 03:59:52,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:52,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535789954] [2020-08-22 03:59:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:52,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535789954] [2020-08-22 03:59:52,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:52,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:59:52,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178341253] [2020-08-22 03:59:52,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:59:52,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:59:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:59:52,934 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-22 03:59:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:53,064 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-08-22 03:59:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:59:53,067 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 03:59:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:53,068 INFO L225 Difference]: With dead ends: 75 [2020-08-22 03:59:53,068 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 03:59:53,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:59:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 03:59:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-08-22 03:59:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 03:59:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-22 03:59:53,075 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-22 03:59:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:53,076 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-22 03:59:53,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:59:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-22 03:59:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 03:59:53,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:53,077 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:53,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:59:53,078 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1129664138, now seen corresponding path program 8 times [2020-08-22 03:59:53,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:53,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384886695] [2020-08-22 03:59:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:53,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:53,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384886695] [2020-08-22 03:59:53,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:53,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:59:53,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959760737] [2020-08-22 03:59:53,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:59:53,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:59:53,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:59:53,248 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-22 03:59:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:53,408 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-08-22 03:59:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:59:53,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-22 03:59:53,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:53,410 INFO L225 Difference]: With dead ends: 79 [2020-08-22 03:59:53,410 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 03:59:53,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:59:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 03:59:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-08-22 03:59:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 03:59:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-22 03:59:53,416 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-22 03:59:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:53,417 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-22 03:59:53,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:59:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-22 03:59:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 03:59:53,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:53,418 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:53,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:59:53,419 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:53,420 INFO L82 PathProgramCache]: Analyzing trace with hash -386522360, now seen corresponding path program 9 times [2020-08-22 03:59:53,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:53,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558314582] [2020-08-22 03:59:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:53,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:59:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:59:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:59:53,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558314582] [2020-08-22 03:59:53,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:59:53,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:59:53,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981195859] [2020-08-22 03:59:53,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:59:53,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:59:53,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:59:53,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:59:53,594 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-22 03:59:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:59:53,733 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-08-22 03:59:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 03:59:53,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-22 03:59:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:59:53,735 INFO L225 Difference]: With dead ends: 83 [2020-08-22 03:59:53,735 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 03:59:53,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:59:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 03:59:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-08-22 03:59:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 03:59:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-22 03:59:53,741 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-22 03:59:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:59:53,742 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-22 03:59:53,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:59:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-22 03:59:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 03:59:53,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:59:53,743 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:59:53,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:59:53,743 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:59:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:59:53,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1447833594, now seen corresponding path program 10 times [2020-08-22 03:59:53,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:59:53,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345867480] [2020-08-22 03:59:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:59:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:00:00,344 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 77 DAG size of output: 13 [2020-08-22 04:00:02,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:00:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:00:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:00:02,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345867480] [2020-08-22 04:00:02,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:00:02,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 04:00:02,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362701212] [2020-08-22 04:00:02,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 04:00:02,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:00:02,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 04:00:02,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:00:02,130 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 15 states. [2020-08-22 04:00:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:00:02,387 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-08-22 04:00:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 04:00:02,388 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-08-22 04:00:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:00:02,389 INFO L225 Difference]: With dead ends: 66 [2020-08-22 04:00:02,389 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 04:00:02,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:00:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 04:00:02,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-08-22 04:00:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 04:00:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-08-22 04:00:02,404 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 34 [2020-08-22 04:00:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:00:02,406 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-08-22 04:00:02,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 04:00:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-08-22 04:00:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 04:00:02,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:00:02,409 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:00:02,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:00:02,410 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:00:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:00:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash 834286980, now seen corresponding path program 11 times [2020-08-22 04:00:02,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:00:02,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416105351] [2020-08-22 04:00:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:00:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:00:02,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:00:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:00:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:00:02,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416105351] [2020-08-22 04:00:02,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:00:02,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 04:00:02,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937485564] [2020-08-22 04:00:02,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 04:00:02,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:00:02,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 04:00:02,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:00:02,649 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 13 states. [2020-08-22 04:00:02,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:00:02,836 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-08-22 04:00:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 04:00:02,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-22 04:00:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:00:02,837 INFO L225 Difference]: With dead ends: 89 [2020-08-22 04:00:02,837 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:00:02,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:00:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:00:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:00:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:00:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:00:02,840 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-08-22 04:00:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:00:02,840 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:00:02,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 04:00:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:00:02,841 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:00:02,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:00:02,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:00:03,061 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-08-22 04:00:03,106 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 04:00:03,106 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:00:03,107 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:00:03,107 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:00:03,107 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:00:03,107 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:00:03,107 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2020-08-22 04:00:03,107 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2020-08-22 04:00:03,107 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-22 04:00:03,108 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-22 04:00:03,108 INFO L268 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-08-22 04:00:03,108 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (let ((.cse0 (div main_~v~0 4294967296))) (or (and (<= main_~v~0 9) (<= 9 main_~v~0)) (and (<= .cse0 0) (not (= main_~v~0 (let ((.cse1 (div main_~v~0 4))) (+ (* (div (+ main_~v~0 (* .cse1 (- 4))) 4294967296) 4294967296) (* .cse1 4))))) (<= 10 main_~v~0)) (and (<= main_~v~0 8) (< 0 (+ .cse0 1))))) [2020-08-22 04:00:03,108 INFO L264 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (and (<= (div main_~v~0 4294967296) 0) (not (= main_~v~0 (let ((.cse0 (div main_~v~0 4))) (+ (* 4294967296 (div (+ main_~v~0 (* .cse0 (- 4))) 4294967296)) (* 4 .cse0))))) (<= 10 main_~v~0)) [2020-08-22 04:00:03,108 INFO L268 CegarLoopResult]: For program point L17-2(lines 17 23) no Hoare annotation was computed. [2020-08-22 04:00:03,109 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-22 04:00:03,109 INFO L268 CegarLoopResult]: For program point L17-4(lines 17 23) no Hoare annotation was computed. [2020-08-22 04:00:03,109 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2020-08-22 04:00:03,109 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-08-22 04:00:03,109 INFO L268 CegarLoopResult]: For program point L22(lines 20 23) no Hoare annotation was computed. [2020-08-22 04:00:03,109 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 23) no Hoare annotation was computed. [2020-08-22 04:00:03,109 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 23) the Hoare annotation is: (or (and (<= 0 main_~v~0) (<= main_~v~0 0)) (and (<= (div main_~v~0 4294967296) 0) (<= 10 main_~v~0))) [2020-08-22 04:00:03,110 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 04:00:03,110 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-22 04:00:03,110 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 04:00:03,110 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-22 04:00:03,110 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-22 04:00:03,110 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-22 04:00:03,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:00:03 BoogieIcfgContainer [2020-08-22 04:00:03,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:00:03,133 INFO L168 Benchmark]: Toolchain (without parser) took 12997.83 ms. Allocated memory was 139.5 MB in the beginning and 245.4 MB in the end (delta: 105.9 MB). Free memory was 100.9 MB in the beginning and 113.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 93.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:00:03,134 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-22 04:00:03,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.89 ms. Allocated memory is still 139.5 MB. Free memory was 100.9 MB in the beginning and 91.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 04:00:03,135 INFO L168 Benchmark]: Boogie Preprocessor took 166.79 ms. Allocated memory was 139.5 MB in the beginning and 205.0 MB in the end (delta: 65.5 MB). Free memory was 91.1 MB in the beginning and 183.3 MB in the end (delta: -92.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 04:00:03,136 INFO L168 Benchmark]: RCFGBuilder took 313.16 ms. Allocated memory is still 205.0 MB. Free memory was 183.3 MB in the beginning and 169.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 04:00:03,137 INFO L168 Benchmark]: TraceAbstraction took 12246.51 ms. Allocated memory was 205.0 MB in the beginning and 245.4 MB in the end (delta: 40.4 MB). Free memory was 169.2 MB in the beginning and 113.4 MB in the end (delta: 55.8 MB). Peak memory consumption was 96.2 MB. Max. memory is 7.1 GB. [2020-08-22 04:00:03,141 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.89 ms. Allocated memory is still 139.5 MB. Free memory was 100.9 MB in the beginning and 91.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 166.79 ms. Allocated memory was 139.5 MB in the beginning and 205.0 MB in the end (delta: 65.5 MB). Free memory was 91.1 MB in the beginning and 183.3 MB in the end (delta: -92.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.16 ms. Allocated memory is still 205.0 MB. Free memory was 183.3 MB in the beginning and 169.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12246.51 ms. Allocated memory was 205.0 MB in the beginning and 245.4 MB in the end (delta: 40.4 MB). Free memory was 169.2 MB in the beginning and 113.4 MB in the end (delta: 55.8 MB). Peak memory consumption was 96.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((v <= 9 && 9 <= v) || ((v / 4294967296 <= 0 && !(v == (v + v / 4 * -4) / 4294967296 * 4294967296 + v / 4 * 4)) && 10 <= v)) || (v <= 8 && 0 < v / 4294967296 + 1) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (0 <= v && v <= 0) || (v / 4294967296 <= 0 && 10 <= v) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.9s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 216 SDslu, 1651 SDs, 0 SdLazy, 1279 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=12, 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, 13 MinimizatonAttempts, 96 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 44 NumberOfFragments, 150 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 314 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 301 ConstructedInterpolants, 0 QuantifiedInterpolants, 33605 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 21/506 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...