/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:54:12,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:54:12,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:54:12,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:54:12,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:54:12,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:54:12,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:54:12,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:54:12,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:54:12,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:54:12,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:54:12,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:54:12,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:54:12,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:54:12,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:54:12,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:54:12,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:54:12,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:54:12,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:54:12,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:54:12,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:54:12,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:54:12,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:54:12,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:54:12,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:54:12,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:54:12,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:54:12,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:54:12,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:54:12,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 02:54:12,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 02:54:12,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 02:54:12,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 02:54:12,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 02:54:12,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 02:54:12,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 02:54:12,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 02:54:12,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 02:54:12,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:54:12,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:54:12,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:54:12,631 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 [2020-08-19 02:54:12,670 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:54:12,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:54:12,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:54:12,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:54:12,674 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:54:12,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:54:12,674 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:54:12,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:54:12,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:54:12,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:54:12,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:54:12,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:54:12,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:54:12,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:54:12,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:54:12,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:54:12,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:54:12,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:54:12,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:54:12,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:54:12,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:54:12,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:54:12,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:54:12,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:54:12,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:54:12,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:54:12,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:54:12,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:54:12,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:54:12,680 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:54:13,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:54:13,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:54:13,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:54:13,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:54:13,036 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:54:13,037 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-08-19 02:54:13,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dc2fe8cd/8fc9abc0b633495591ef4cd17f5c2017/FLAGeaa2d17a1 [2020-08-19 02:54:13,590 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:54:13,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-08-19 02:54:13,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dc2fe8cd/8fc9abc0b633495591ef4cd17f5c2017/FLAGeaa2d17a1 [2020-08-19 02:54:13,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dc2fe8cd/8fc9abc0b633495591ef4cd17f5c2017 [2020-08-19 02:54:13,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:54:13,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:54:13,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:54:13,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:54:13,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:54:13,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:54:13" (1/1) ... [2020-08-19 02:54:13,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e14926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:13, skipping insertion in model container [2020-08-19 02:54:13,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:54:13" (1/1) ... [2020-08-19 02:54:13,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:54:14,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:54:14,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:54:14,215 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:54:14,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:54:14,243 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:54:14,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14 WrapperNode [2020-08-19 02:54:14,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:54:14,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:54:14,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:54:14,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:54:14,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (1/1) ... [2020-08-19 02:54:14,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (1/1) ... [2020-08-19 02:54:14,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (1/1) ... [2020-08-19 02:54:14,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (1/1) ... [2020-08-19 02:54:14,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (1/1) ... [2020-08-19 02:54:14,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (1/1) ... [2020-08-19 02:54:14,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (1/1) ... [2020-08-19 02:54:14,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:54:14,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:54:14,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:54:14,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:54:14,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (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 [2020-08-19 02:54:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:54:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:54:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 02:54:14,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 02:54:14,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:54:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:54:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 02:54:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 02:54:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:54:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:54:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:54:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:54:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:54:14,595 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:54:14,596 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 02:54:14,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:54:14 BoogieIcfgContainer [2020-08-19 02:54:14,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:54:14,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:54:14,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:54:14,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:54:14,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:54:13" (1/3) ... [2020-08-19 02:54:14,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383fce5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:54:14, skipping insertion in model container [2020-08-19 02:54:14,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:14" (2/3) ... [2020-08-19 02:54:14,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383fce5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:54:14, skipping insertion in model container [2020-08-19 02:54:14,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:54:14" (3/3) ... [2020-08-19 02:54:14,609 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2020-08-19 02:54:14,620 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:54:14,637 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:54:14,682 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:54:14,725 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:54:14,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:54:14,726 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:54:14,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:54:14,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:54:14,727 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:54:14,727 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:54:14,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:54:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-19 02:54:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 02:54:14,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:14,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:14,760 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1782755915, now seen corresponding path program 1 times [2020-08-19 02:54:14,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:14,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687196672] [2020-08-19 02:54:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:14,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:14,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687196672] [2020-08-19 02:54:14,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:54:14,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:54:14,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692625546] [2020-08-19 02:54:14,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:54:14,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:54:14,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:54:14,969 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-08-19 02:54:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:15,017 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-08-19 02:54:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:54:15,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-19 02:54:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:15,026 INFO L225 Difference]: With dead ends: 31 [2020-08-19 02:54:15,026 INFO L226 Difference]: Without dead ends: 12 [2020-08-19 02:54:15,029 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 [2020-08-19 02:54:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-19 02:54:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-19 02:54:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-19 02:54:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-08-19 02:54:15,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-08-19 02:54:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:15,063 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-08-19 02:54:15,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:54:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-08-19 02:54:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-19 02:54:15,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:15,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:15,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:54:15,065 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash 604679234, now seen corresponding path program 1 times [2020-08-19 02:54:15,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:15,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059747714] [2020-08-19 02:54:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:15,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059747714] [2020-08-19 02:54:15,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:54:15,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 02:54:15,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389974675] [2020-08-19 02:54:15,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:54:15,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:15,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:54:15,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:54:15,121 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-08-19 02:54:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:15,143 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-08-19 02:54:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:54:15,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-08-19 02:54:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:15,145 INFO L225 Difference]: With dead ends: 18 [2020-08-19 02:54:15,145 INFO L226 Difference]: Without dead ends: 13 [2020-08-19 02:54:15,146 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 [2020-08-19 02:54:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-19 02:54:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-19 02:54:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-19 02:54:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-19 02:54:15,151 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-19 02:54:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:15,152 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-19 02:54:15,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:54:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-19 02:54:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 02:54:15,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:15,153 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:15,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:54:15,153 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1600724821, now seen corresponding path program 2 times [2020-08-19 02:54:15,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:15,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740674896] [2020-08-19 02:54:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:15,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740674896] [2020-08-19 02:54:15,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:54:15,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 02:54:15,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851868567] [2020-08-19 02:54:15,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:54:15,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:15,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:54:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:54:15,225 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-08-19 02:54:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:15,258 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-19 02:54:15,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:54:15,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-19 02:54:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:15,262 INFO L225 Difference]: With dead ends: 19 [2020-08-19 02:54:15,263 INFO L226 Difference]: Without dead ends: 14 [2020-08-19 02:54:15,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:54:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-19 02:54:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-19 02:54:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-19 02:54:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-19 02:54:15,269 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-19 02:54:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:15,270 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-19 02:54:15,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:54:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-19 02:54:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:54:15,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:15,271 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:15,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:54:15,272 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1881600350, now seen corresponding path program 3 times [2020-08-19 02:54:15,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:15,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079024760] [2020-08-19 02:54:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:15,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079024760] [2020-08-19 02:54:15,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:54:15,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:54:15,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143619563] [2020-08-19 02:54:15,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:54:15,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:54:15,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:54:15,347 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-08-19 02:54:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:15,372 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-08-19 02:54:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:54:15,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-19 02:54:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:15,374 INFO L225 Difference]: With dead ends: 20 [2020-08-19 02:54:15,375 INFO L226 Difference]: Without dead ends: 15 [2020-08-19 02:54:15,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:54:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-19 02:54:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-19 02:54:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-19 02:54:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-19 02:54:15,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-08-19 02:54:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:15,381 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-19 02:54:15,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:54:15,382 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-19 02:54:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 02:54:15,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:15,382 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:15,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:54:15,383 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:15,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1835469045, now seen corresponding path program 4 times [2020-08-19 02:54:15,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:15,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543082905] [2020-08-19 02:54:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:15,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543082905] [2020-08-19 02:54:15,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:54:15,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:54:15,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186150418] [2020-08-19 02:54:15,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:54:15,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:54:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:54:15,566 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-08-19 02:54:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:15,649 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-19 02:54:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:54:15,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-19 02:54:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:15,651 INFO L225 Difference]: With dead ends: 21 [2020-08-19 02:54:15,651 INFO L226 Difference]: Without dead ends: 16 [2020-08-19 02:54:15,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:54:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-19 02:54:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-19 02:54:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-19 02:54:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-19 02:54:15,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-08-19 02:54:15,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:15,658 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-19 02:54:15,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:54:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-19 02:54:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 02:54:15,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:15,659 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:15,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:54:15,660 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:15,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503298, now seen corresponding path program 5 times [2020-08-19 02:54:15,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:15,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225631478] [2020-08-19 02:54:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:15,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225631478] [2020-08-19 02:54:15,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:54:15,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 02:54:15,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418707545] [2020-08-19 02:54:15,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:54:15,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:15,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:54:15,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:54:15,731 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-08-19 02:54:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:15,746 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-08-19 02:54:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:54:15,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-19 02:54:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:15,747 INFO L225 Difference]: With dead ends: 16 [2020-08-19 02:54:15,748 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:54:15,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:54:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:54:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:54:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:54:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:54:15,750 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-08-19 02:54:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:15,750 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:54:15,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:54:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:54:15,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:54:15,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:54:15,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:54:15,854 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 02:54:15,855 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:54:15,855 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:54:15,855 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:54:15,855 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:54:15,856 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:54:15,856 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-19 02:54:15,856 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-19 02:54:15,856 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-19 02:54:15,856 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-19 02:54:15,856 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-08-19 02:54:15,856 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-08-19 02:54:15,857 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-19 02:54:15,857 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 9))) (and (<= 10 main_~j~0) (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= main_~j~0 10))) (and (<= main_~j~0 6) (<= (+ main_~j~0 3) main_~i~0) (<= 6 main_~j~0)) (let ((.cse1 (+ main_~i~0 6))) (and (<= main_~j~0 .cse1) (<= .cse1 main_~j~0) (<= 9 main_~j~0) (<= main_~j~0 9))) (let ((.cse2 (+ main_~i~0 3))) (and (<= main_~j~0 8) (<= main_~j~0 .cse2) (<= .cse2 main_~j~0) (<= 8 main_~j~0))) (and (<= main_~j~0 7) (<= 7 main_~j~0) (<= main_~j~0 main_~i~0) (<= main_~i~0 main_~j~0))) [2020-08-19 02:54:15,857 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 20) the Hoare annotation is: (and (<= main_~j~0 6) (<= 6 main_~j~0)) [2020-08-19 02:54:15,858 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-08-19 02:54:15,858 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-19 02:54:15,858 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-19 02:54:15,858 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 02:54:15,858 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-19 02:54:15,858 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-19 02:54:15,859 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-19 02:54:15,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:54:15 BoogieIcfgContainer [2020-08-19 02:54:15,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:54:15,883 INFO L168 Benchmark]: Toolchain (without parser) took 1919.55 ms. Allocated memory was 147.8 MB in the beginning and 233.8 MB in the end (delta: 86.0 MB). Free memory was 104.0 MB in the beginning and 194.8 MB in the end (delta: -90.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:54:15,884 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 02:54:15,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.73 ms. Allocated memory is still 147.8 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:54:15,886 INFO L168 Benchmark]: Boogie Preprocessor took 29.71 ms. Allocated memory is still 147.8 MB. Free memory was 94.5 MB in the beginning and 93.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:54:15,887 INFO L168 Benchmark]: RCFGBuilder took 325.73 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 93.0 MB in the beginning and 171.6 MB in the end (delta: -78.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:54:15,888 INFO L168 Benchmark]: TraceAbstraction took 1278.56 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 170.9 MB in the beginning and 194.8 MB in the end (delta: -23.8 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2020-08-19 02:54:15,892 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.73 ms. Allocated memory is still 147.8 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.71 ms. Allocated memory is still 147.8 MB. Free memory was 94.5 MB in the beginning and 93.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.73 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 93.0 MB in the beginning and 171.6 MB in the end (delta: -78.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1278.56 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 170.9 MB in the beginning and 194.8 MB in the end (delta: -23.8 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 17]: Loop Invariant Derived loop invariant: ((((((10 <= j && i + 9 <= j) && j <= i + 9) && j <= 10) || ((j <= 6 && j + 3 <= i) && 6 <= j)) || (((j <= i + 6 && i + 6 <= j) && 9 <= j) && j <= 9)) || (((j <= 8 && j <= i + 3) && i + 3 <= j) && 8 <= j)) || (((j <= 7 && 7 <= j) && j <= i) && i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 1 SDslu, 140 SDs, 0 SdLazy, 90 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 89 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2025 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 15/35 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...