/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=0.3 --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 04:48:22,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:48:22,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:48:22,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:48:22,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:48:22,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:48:22,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:48:22,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:48:22,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:48:22,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:48:22,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:48:22,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:48:22,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:48:22,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:48:22,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:48:22,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:48:22,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:48:22,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:48:22,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:48:22,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:48:22,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:48:22,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:48:22,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:48:22,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:48:22,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:48:22,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:48:22,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:48:22,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:48:22,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:48:22,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:48:22,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:48:22,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:48:22,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:48:22,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:48:22,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:48:22,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:48:22,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:48:22,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:48:22,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:48:22,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:48:22,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:48:22,584 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 04:48:22,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:48:22,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:48:22,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:48:22,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:48:22,616 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:48:22,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:48:22,616 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:48:22,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:48:22,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:48:22,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:48:22,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:48:22,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:48:22,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:48:22,618 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:48:22,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:48:22,618 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:48:22,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:48:22,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:48:22,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:48:22,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:48:22,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:48:22,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:48:22,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:48:22,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:48:22,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:48:22,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:48:22,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:48:22,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:48:22,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:48:22,621 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=0.3;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=0.3;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=0.3;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=0.3;log-additional-information=true; [2020-08-22 04:48:22,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:48:22,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:48:22,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:48:22,965 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:48:22,967 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:48:22,968 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-22 04:48:23,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8362a62a/6f029cafc7c6416e8ceec33275cdf28a/FLAG1cea87d85 [2020-08-22 04:48:23,473 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:48:23,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-08-22 04:48:23,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8362a62a/6f029cafc7c6416e8ceec33275cdf28a/FLAG1cea87d85 [2020-08-22 04:48:23,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8362a62a/6f029cafc7c6416e8ceec33275cdf28a [2020-08-22 04:48:23,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:48:23,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:48:23,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:48:23,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:48:23,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:48:23,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:48:23" (1/1) ... [2020-08-22 04:48:23,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a9c66bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:23, skipping insertion in model container [2020-08-22 04:48:23,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:48:23" (1/1) ... [2020-08-22 04:48:23,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:48:23,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:48:24,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:48:24,113 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:48:24,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:48:24,143 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:48:24,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24 WrapperNode [2020-08-22 04:48:24,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:48:24,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:48:24,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:48:24,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:48:24,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (1/1) ... [2020-08-22 04:48:24,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (1/1) ... [2020-08-22 04:48:24,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (1/1) ... [2020-08-22 04:48:24,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (1/1) ... [2020-08-22 04:48:24,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (1/1) ... [2020-08-22 04:48:24,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (1/1) ... [2020-08-22 04:48:24,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (1/1) ... [2020-08-22 04:48:24,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:48:24,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:48:24,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:48:24,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:48:24,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (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 04:48:24,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:48:24,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:48:24,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 04:48:24,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:48:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:48:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 04:48:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:48:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:48:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:48:24,567 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:48:24,567 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 04:48:24,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:48:24 BoogieIcfgContainer [2020-08-22 04:48:24,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:48:24,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:48:24,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:48:24,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:48:24,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:48:23" (1/3) ... [2020-08-22 04:48:24,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470183e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:48:24, skipping insertion in model container [2020-08-22 04:48:24,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:48:24" (2/3) ... [2020-08-22 04:48:24,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470183e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:48:24, skipping insertion in model container [2020-08-22 04:48:24,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:48:24" (3/3) ... [2020-08-22 04:48:24,579 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-08-22 04:48:24,590 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:48:24,597 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:48:24,610 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:48:24,634 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:48:24,635 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:48:24,635 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:48:24,635 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:48:24,635 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:48:24,635 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:48:24,635 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:48:24,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:48:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 04:48:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 04:48:24,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:24,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:24,661 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:24,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-08-22 04:48:24,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:24,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892121843] [2020-08-22 04:48:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:24,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:24,799 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 04:48:24,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892121843] [2020-08-22 04:48:24,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:48:24,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 04:48:24,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545529954] [2020-08-22 04:48:24,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 04:48:24,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:24,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 04:48:24,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 04:48:24,826 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-22 04:48:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:24,852 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2020-08-22 04:48:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 04:48:24,853 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 04:48:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:24,862 INFO L225 Difference]: With dead ends: 49 [2020-08-22 04:48:24,862 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 04:48:24,866 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 04:48:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 04:48:24,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 04:48:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 04:48:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-22 04:48:24,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-08-22 04:48:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:24,907 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-22 04:48:24,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 04:48:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-22 04:48:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 04:48:24,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:24,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:24,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:48:24,910 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2031885466, now seen corresponding path program 1 times [2020-08-22 04:48:24,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:24,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007858739] [2020-08-22 04:48:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,009 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 04:48:25,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007858739] [2020-08-22 04:48:25,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:48:25,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:48:25,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624747019] [2020-08-22 04:48:25,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:48:25,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:25,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:48:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:48:25,014 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-08-22 04:48:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:25,041 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-22 04:48:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:48:25,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-08-22 04:48:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:25,044 INFO L225 Difference]: With dead ends: 48 [2020-08-22 04:48:25,044 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 04:48:25,045 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 04:48:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 04:48:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-08-22 04:48:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 04:48:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-22 04:48:25,053 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-08-22 04:48:25,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:25,053 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-22 04:48:25,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:48:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-22 04:48:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 04:48:25,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:25,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:25,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:48:25,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:25,056 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-08-22 04:48:25,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:25,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777299200] [2020-08-22 04:48:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,171 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 04:48:25,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777299200] [2020-08-22 04:48:25,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:25,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 04:48:25,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541582196] [2020-08-22 04:48:25,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:48:25,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:25,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:48:25,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:48:25,175 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-08-22 04:48:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:25,211 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-08-22 04:48:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:48:25,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-22 04:48:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:25,213 INFO L225 Difference]: With dead ends: 51 [2020-08-22 04:48:25,214 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 04:48:25,214 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 04:48:25,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 04:48:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-08-22 04:48:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 04:48:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-22 04:48:25,222 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-08-22 04:48:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:25,222 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-22 04:48:25,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:48:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-22 04:48:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 04:48:25,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:25,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:25,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:48:25,224 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-08-22 04:48:25,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:25,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289174923] [2020-08-22 04:48:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,360 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 04:48:25,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289174923] [2020-08-22 04:48:25,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:25,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 04:48:25,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708550141] [2020-08-22 04:48:25,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:48:25,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:25,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:48:25,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:48:25,363 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-08-22 04:48:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:25,406 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-22 04:48:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:48:25,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 04:48:25,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:25,408 INFO L225 Difference]: With dead ends: 55 [2020-08-22 04:48:25,408 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 04:48:25,409 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 04:48:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 04:48:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-08-22 04:48:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 04:48:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-22 04:48:25,417 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-08-22 04:48:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:25,418 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-22 04:48:25,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:48:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-22 04:48:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:48:25,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:25,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:25,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:48:25,420 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:25,420 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-08-22 04:48:25,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:25,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988530558] [2020-08-22 04:48:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,583 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 04:48:25,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988530558] [2020-08-22 04:48:25,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:25,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:48:25,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19886545] [2020-08-22 04:48:25,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:48:25,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:25,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:48:25,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:48:25,587 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-08-22 04:48:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:25,647 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-08-22 04:48:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:48:25,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 04:48:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:25,649 INFO L225 Difference]: With dead ends: 59 [2020-08-22 04:48:25,649 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 04:48:25,650 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 04:48:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 04:48:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-08-22 04:48:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 04:48:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-22 04:48:25,658 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-22 04:48:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:25,658 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-22 04:48:25,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:48:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-22 04:48:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:48:25,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:25,660 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:25,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:48:25,661 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 924643730, now seen corresponding path program 4 times [2020-08-22 04:48:25,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:25,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811709095] [2020-08-22 04:48:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:25,812 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 04:48:25,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811709095] [2020-08-22 04:48:25,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:25,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:48:25,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148560507] [2020-08-22 04:48:25,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:48:25,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:25,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:48:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:48:25,815 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-22 04:48:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:25,873 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-08-22 04:48:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:48:25,873 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 04:48:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:25,874 INFO L225 Difference]: With dead ends: 63 [2020-08-22 04:48:25,875 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 04:48:25,875 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 04:48:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 04:48:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-08-22 04:48:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 04:48:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 04:48:25,882 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 04:48:25,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:25,883 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 04:48:25,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:48:25,883 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 04:48:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:48:25,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:25,884 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:25,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:48:25,885 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash 157361168, now seen corresponding path program 5 times [2020-08-22 04:48:25,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:25,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636635228] [2020-08-22 04:48:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:26,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:26,023 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 04:48:26,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636635228] [2020-08-22 04:48:26,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:26,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:48:26,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381854318] [2020-08-22 04:48:26,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:48:26,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:48:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:48:26,026 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-22 04:48:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:26,111 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-22 04:48:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:48:26,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-22 04:48:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:26,112 INFO L225 Difference]: With dead ends: 67 [2020-08-22 04:48:26,113 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 04:48:26,113 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 04:48:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 04:48:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-22 04:48:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 04:48:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 04:48:26,120 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-22 04:48:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:26,120 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 04:48:26,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:48:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 04:48:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:48:26,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:26,122 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:26,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:48:26,123 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:26,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1533193998, now seen corresponding path program 6 times [2020-08-22 04:48:26,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:26,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553974943] [2020-08-22 04:48:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:26,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:26,289 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 04:48:26,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553974943] [2020-08-22 04:48:26,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:26,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 04:48:26,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260894136] [2020-08-22 04:48:26,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 04:48:26,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:26,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 04:48:26,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:48:26,293 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-22 04:48:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:26,396 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-08-22 04:48:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:48:26,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 04:48:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:26,400 INFO L225 Difference]: With dead ends: 71 [2020-08-22 04:48:26,400 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 04:48:26,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:48:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 04:48:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-08-22 04:48:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 04:48:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 04:48:26,410 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-22 04:48:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:26,412 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 04:48:26,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 04:48:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 04:48:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 04:48:26,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:26,414 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:26,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:48:26,415 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash 858616460, now seen corresponding path program 7 times [2020-08-22 04:48:26,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:26,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105762279] [2020-08-22 04:48:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:26,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:26,601 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 04:48:26,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105762279] [2020-08-22 04:48:26,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:26,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:48:26,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225049734] [2020-08-22 04:48:26,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:48:26,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:26,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:48:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:48:26,607 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-22 04:48:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:26,717 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-08-22 04:48:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 04:48:26,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 04:48:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:26,719 INFO L225 Difference]: With dead ends: 75 [2020-08-22 04:48:26,719 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 04:48:26,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:48:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 04:48:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-08-22 04:48:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 04:48:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-22 04:48:26,736 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-22 04:48:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:26,737 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-22 04:48:26,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:48:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-22 04:48:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 04:48:26,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:26,739 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:26,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:48:26,743 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1129664138, now seen corresponding path program 8 times [2020-08-22 04:48:26,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:26,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306950034] [2020-08-22 04:48:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:26,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:26,936 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 04:48:26,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306950034] [2020-08-22 04:48:26,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:26,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:48:26,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415658627] [2020-08-22 04:48:26,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:48:26,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:26,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:48:26,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:48:26,938 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-22 04:48:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:27,065 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-08-22 04:48:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:48:27,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-22 04:48:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:27,067 INFO L225 Difference]: With dead ends: 79 [2020-08-22 04:48:27,067 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 04:48:27,068 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 04:48:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 04:48:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-08-22 04:48:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 04:48:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-22 04:48:27,074 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-22 04:48:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:27,074 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-22 04:48:27,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:48:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-22 04:48:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 04:48:27,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:27,076 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:27,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:48:27,076 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash -386522360, now seen corresponding path program 9 times [2020-08-22 04:48:27,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:27,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236023118] [2020-08-22 04:48:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:27,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:27,255 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 04:48:27,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236023118] [2020-08-22 04:48:27,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:27,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 04:48:27,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670942249] [2020-08-22 04:48:27,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 04:48:27,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 04:48:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:48:27,259 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-22 04:48:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:27,411 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-08-22 04:48:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:48:27,412 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-22 04:48:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:27,414 INFO L225 Difference]: With dead ends: 83 [2020-08-22 04:48:27,414 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 04:48:27,415 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 04:48:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 04:48:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-08-22 04:48:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 04:48:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-22 04:48:27,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-22 04:48:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:27,429 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-22 04:48:27,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 04:48:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-22 04:48:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 04:48:27,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:27,432 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:27,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:48:27,433 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:27,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1447833594, now seen corresponding path program 10 times [2020-08-22 04:48:27,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:27,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329727282] [2020-08-22 04:48:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:35,509 WARN L193 SmtUtils]: Spent 7.79 s on a formula simplification. DAG size of input: 77 DAG size of output: 13 [2020-08-22 04:48:37,588 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (div c_main_~v~0 4))) (let ((.cse23 (* .cse13 (- 4)))) (let ((.cse16 (div (+ c_main_~v~0 .cse23) 4294967296)) (.cse20 (* 4 .cse13)) (.cse14 (div (+ c_main_~v~0 .cse23 (- 4)) 4294967296))) (let ((.cse21 (* 4294967296 .cse14)) (.cse0 (= c_main_~v~0 .cse20)) (.cse17 (* 4294967296 (div c_main_~v~0 4294967296))) (.cse19 (* 4294967296 .cse16))) (let ((.cse18 (+ .cse19 .cse20 2147483647)) (.cse10 (< c_main_~v~0 .cse17)) (.cse11 (not .cse0)) (.cse22 (+ .cse21 .cse20 2147483651))) (let ((.cse8 (< .cse22 c_main_~v~0)) (.cse7 (= c_main_~v~0 (+ .cse21 .cse20 4))) (.cse6 (<= c_main_~v~0 .cse22)) (.cse9 (= c_main_~v~0 (+ .cse21 .cse20 4294967300))) (.cse1 (<= .cse17 c_main_~v~0)) (.cse15 (and .cse10 .cse11)) (.cse2 (= c_main_~v~0 (+ .cse19 .cse20))) (.cse5 (< .cse18 c_main_~v~0)) (.cse4 (= c_main_~v~0 (+ .cse19 .cse20 4294967296))) (.cse3 (<= c_main_~v~0 .cse18))) (let ((.cse12 (and (or .cse0 (and (or .cse8 (not .cse7)) (or .cse6 (not .cse9))) .cse1) (or .cse15 (and (or (not .cse2) .cse5) (or (not .cse4) .cse3)))))) (and (or (and (or .cse0 .cse1) (or (and .cse2 .cse3) (and .cse4 .cse5))) (and (or (and .cse6 .cse7) (and .cse8 .cse9)) .cse10 .cse11) .cse12) (or (and (or (< 2 .cse13) (and (or (and (or .cse0 (< 0 .cse14) .cse1) (or .cse15 (< 0 .cse16))) (<= 10 c_main_~v~0)) (< .cse17 (+ c_main_~v~0 1)))) (or (<= c_main_~v~0 10) (<= .cse13 2))) .cse12))))))))) is different from false [2020-08-22 04:48:37,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:37,645 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 04:48:37,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329727282] [2020-08-22 04:48:37,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:37,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 04:48:37,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728368702] [2020-08-22 04:48:37,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 04:48:37,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:37,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 04:48:37,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=177, Unknown=1, NotChecked=26, Total=240 [2020-08-22 04:48:37,647 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2020-08-22 04:48:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:38,000 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-08-22 04:48:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 04:48:38,001 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-08-22 04:48:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:38,002 INFO L225 Difference]: With dead ends: 66 [2020-08-22 04:48:38,002 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 04:48:38,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=40, Invalid=203, Unknown=1, NotChecked=28, Total=272 [2020-08-22 04:48:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 04:48:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-08-22 04:48:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 04:48:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-08-22 04:48:38,019 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 34 [2020-08-22 04:48:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:38,019 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-08-22 04:48:38,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 04:48:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-08-22 04:48:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 04:48:38,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:48:38,026 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:48:38,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:48:38,026 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:48:38,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:48:38,027 INFO L82 PathProgramCache]: Analyzing trace with hash 834286980, now seen corresponding path program 11 times [2020-08-22 04:48:38,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:48:38,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291877546] [2020-08-22 04:48:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:48:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:38,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:48:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:48:38,240 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 04:48:38,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291877546] [2020-08-22 04:48:38,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:48:38,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 04:48:38,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139626556] [2020-08-22 04:48:38,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 04:48:38,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:48:38,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 04:48:38,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:48:38,242 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 13 states. [2020-08-22 04:48:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:48:38,442 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-08-22 04:48:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 04:48:38,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-22 04:48:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:48:38,443 INFO L225 Difference]: With dead ends: 89 [2020-08-22 04:48:38,444 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:48:38,445 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 04:48:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:48:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:48:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:48:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:48:38,445 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-08-22 04:48:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:48:38,447 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:48:38,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 04:48:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:48:38,447 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:48:38,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:48:38,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:48:38,645 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-08-22 04:48:38,686 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 04:48:38,686 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:48:38,686 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:48:38,686 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:48:38,686 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:48:38,687 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:48:38,687 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2020-08-22 04:48:38,687 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2020-08-22 04:48:38,687 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 04:48:38,687 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 04:48:38,687 INFO L268 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-08-22 04:48:38,688 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 04:48:38,688 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 04:48:38,688 INFO L268 CegarLoopResult]: For program point L17-2(lines 17 23) no Hoare annotation was computed. [2020-08-22 04:48:38,688 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 04:48:38,688 INFO L268 CegarLoopResult]: For program point L17-4(lines 17 23) no Hoare annotation was computed. [2020-08-22 04:48:38,689 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2020-08-22 04:48:38,689 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-08-22 04:48:38,689 INFO L268 CegarLoopResult]: For program point L22(lines 20 23) no Hoare annotation was computed. [2020-08-22 04:48:38,689 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 23) no Hoare annotation was computed. [2020-08-22 04:48:38,689 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 04:48:38,689 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 04:48:38,689 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-22 04:48:38,690 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 04:48:38,690 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-22 04:48:38,690 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-22 04:48:38,690 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-22 04:48:38,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:48:38 BoogieIcfgContainer [2020-08-22 04:48:38,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:48:38,710 INFO L168 Benchmark]: Toolchain (without parser) took 14803.90 ms. Allocated memory was 140.0 MB in the beginning and 247.5 MB in the end (delta: 107.5 MB). Free memory was 102.8 MB in the beginning and 117.8 MB in the end (delta: -15.0 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. [2020-08-22 04:48:38,711 INFO L168 Benchmark]: CDTParser took 0.88 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 04:48:38,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.05 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 92.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 04:48:38,712 INFO L168 Benchmark]: Boogie Preprocessor took 113.79 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 04:48:38,713 INFO L168 Benchmark]: RCFGBuilder took 312.50 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-22 04:48:38,714 INFO L168 Benchmark]: TraceAbstraction took 14135.73 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 166.3 MB in the beginning and 117.8 MB in the end (delta: 48.5 MB). Peak memory consumption was 93.6 MB. Max. memory is 7.1 GB. [2020-08-22 04:48:38,717 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.88 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.05 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 92.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.79 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.50 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14135.73 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 166.3 MB in the beginning and 117.8 MB in the end (delta: 48.5 MB). Peak memory consumption was 93.6 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: 13.8s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 217 SDslu, 1671 SDs, 0 SdLazy, 1279 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.1s 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, 11.6s InterpolantComputationTime, 314 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 301 ConstructedInterpolants, 0 QuantifiedInterpolants, 56111 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...