/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:16:15,551 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 12:16:15,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:16:15,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:16:15,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:16:15,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:16:15,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:16:15,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:16:15,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:16:15,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:16:15,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:16:15,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:16:15,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:16:15,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:16:15,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:16:15,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:16:15,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:16:15,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:16:15,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:16:15,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:16:15,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:16:15,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:16:15,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:16:15,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:16:15,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:16:15,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:16:15,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:16:15,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:16:15,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:16:15,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:16:15,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:16:15,722 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:16:15,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:16:15,723 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:16:15,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:16:15,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:16:15,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:16:15,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:16:15,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:16:15,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:16:15,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:16:15,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:16:15,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:16:15,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:16:15,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:16:15,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:16:15,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:16:15,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:16:15,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:16:15,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:16:15,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:16:15,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:16:15,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:16:15,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:16:15,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:16:15,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:16:15,728 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:16:16,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:16:16,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:16:16,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:16:16,049 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:16:16,050 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:16:16,051 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-08-18 12:16:16,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90e1fea46/cc8196855fcf44d1a32bd011e3b74c49/FLAG18c5dc9c9 [2020-08-18 12:16:16,602 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:16:16,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-08-18 12:16:16,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90e1fea46/cc8196855fcf44d1a32bd011e3b74c49/FLAG18c5dc9c9 [2020-08-18 12:16:17,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90e1fea46/cc8196855fcf44d1a32bd011e3b74c49 [2020-08-18 12:16:17,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:16:17,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:16:17,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:16:17,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:16:17,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:16:17,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b5b388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17, skipping insertion in model container [2020-08-18 12:16:17,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:16:17,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:16:17,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:16:17,267 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:16:17,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:16:17,306 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:16:17,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17 WrapperNode [2020-08-18 12:16:17,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:16:17,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:16:17,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:16:17,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:16:17,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (1/1) ... [2020-08-18 12:16:17,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:16:17,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:16:17,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:16:17,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:16:17,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:16:17,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:16:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:16:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 12:16:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 12:16:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:16:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:16:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 12:16:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 12:16:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 12:16:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:16:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:16:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:16:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:16:17,788 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:16:17,788 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 12:16:17,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:16:17 BoogieIcfgContainer [2020-08-18 12:16:17,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:16:17,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:16:17,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:16:17,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:16:17,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:16:17" (1/3) ... [2020-08-18 12:16:17,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192ccfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:16:17, skipping insertion in model container [2020-08-18 12:16:17,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:17" (2/3) ... [2020-08-18 12:16:17,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192ccfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:16:17, skipping insertion in model container [2020-08-18 12:16:17,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:16:17" (3/3) ... [2020-08-18 12:16:17,801 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-08-18 12:16:17,818 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:16:17,827 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:16:17,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:16:17,872 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:16:17,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:16:17,873 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:16:17,873 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:16:17,873 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:16:17,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:16:17,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:16:17,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:16:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-08-18 12:16:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 12:16:17,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:17,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:17,928 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1128800291, now seen corresponding path program 1 times [2020-08-18 12:16:17,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:17,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938672073] [2020-08-18 12:16:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:18,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:16:18,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938672073] [2020-08-18 12:16:18,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:18,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:16:18,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133659260] [2020-08-18 12:16:18,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:16:18,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:18,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:16:18,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:16:18,225 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-08-18 12:16:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:18,414 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions. [2020-08-18 12:16:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:16:18,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 12:16:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:18,428 INFO L225 Difference]: With dead ends: 87 [2020-08-18 12:16:18,429 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:16:18,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:16:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 12:16:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 12:16:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-18 12:16:18,495 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2020-08-18 12:16:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:18,496 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-18 12:16:18,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:16:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-18 12:16:18,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 12:16:18,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:18,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:18,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:16:18,499 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:18,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1106844324, now seen corresponding path program 1 times [2020-08-18 12:16:18,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:18,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455825143] [2020-08-18 12:16:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:18,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:16:18,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455825143] [2020-08-18 12:16:18,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:18,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:16:18,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505114991] [2020-08-18 12:16:18,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:16:18,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:18,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:16:18,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:16:18,572 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-08-18 12:16:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:18,684 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-08-18 12:16:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:16:18,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 12:16:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:18,688 INFO L225 Difference]: With dead ends: 54 [2020-08-18 12:16:18,688 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 12:16:18,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 12:16:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-08-18 12:16:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 12:16:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2020-08-18 12:16:18,705 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2020-08-18 12:16:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:18,705 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2020-08-18 12:16:18,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:16:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2020-08-18 12:16:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 12:16:18,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:18,707 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:18,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:16:18,707 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:18,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1247762898, now seen corresponding path program 1 times [2020-08-18 12:16:18,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:18,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396989127] [2020-08-18 12:16:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:18,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:18,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:16:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:16:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396989127] [2020-08-18 12:16:18,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:18,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:16:18,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236814380] [2020-08-18 12:16:18,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:16:18,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:16:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:16:18,807 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2020-08-18 12:16:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:18,918 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 12:16:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:16:18,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 12:16:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:18,920 INFO L225 Difference]: With dead ends: 56 [2020-08-18 12:16:18,920 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 12:16:18,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 12:16:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 12:16:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 12:16:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-08-18 12:16:18,937 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2020-08-18 12:16:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:18,938 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-08-18 12:16:18,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:16:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-08-18 12:16:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 12:16:18,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:18,939 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:18,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:16:18,940 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2050697988, now seen corresponding path program 1 times [2020-08-18 12:16:18,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:18,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240021671] [2020-08-18 12:16:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:16:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 12:16:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 12:16:19,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240021671] [2020-08-18 12:16:19,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:19,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:16:19,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324577328] [2020-08-18 12:16:19,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:16:19,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:16:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:19,045 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2020-08-18 12:16:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:19,191 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-08-18 12:16:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:16:19,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-18 12:16:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:19,193 INFO L225 Difference]: With dead ends: 60 [2020-08-18 12:16:19,193 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 12:16:19,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:16:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 12:16:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-18 12:16:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 12:16:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-08-18 12:16:19,207 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2020-08-18 12:16:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:19,208 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-08-18 12:16:19,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:16:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-08-18 12:16:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 12:16:19,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:19,210 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:19,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:16:19,210 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:19,211 INFO L82 PathProgramCache]: Analyzing trace with hash -35497745, now seen corresponding path program 1 times [2020-08-18 12:16:19,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:19,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516892934] [2020-08-18 12:16:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:16:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 12:16:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 12:16:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 12:16:19,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516892934] [2020-08-18 12:16:19,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:19,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:16:19,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526865246] [2020-08-18 12:16:19,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:16:19,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:19,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:16:19,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:16:19,334 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-08-18 12:16:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:19,432 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-08-18 12:16:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:16:19,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-18 12:16:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:19,434 INFO L225 Difference]: With dead ends: 65 [2020-08-18 12:16:19,434 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 12:16:19,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 12:16:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-08-18 12:16:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 12:16:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-18 12:16:19,447 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2020-08-18 12:16:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:19,448 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-18 12:16:19,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:16:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-18 12:16:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 12:16:19,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:19,450 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:19,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:16:19,450 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:19,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:19,451 INFO L82 PathProgramCache]: Analyzing trace with hash 663071772, now seen corresponding path program 1 times [2020-08-18 12:16:19,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:19,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541047397] [2020-08-18 12:16:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:16:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 12:16:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:16:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:16:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 12:16:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:16:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-18 12:16:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541047397] [2020-08-18 12:16:19,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:19,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:16:19,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674292909] [2020-08-18 12:16:19,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:16:19,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:19,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:16:19,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:19,551 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2020-08-18 12:16:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:19,685 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-08-18 12:16:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:16:19,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-08-18 12:16:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:19,687 INFO L225 Difference]: With dead ends: 74 [2020-08-18 12:16:19,687 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 12:16:19,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:16:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 12:16:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-08-18 12:16:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 12:16:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-08-18 12:16:19,700 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2020-08-18 12:16:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:19,701 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-08-18 12:16:19,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:16:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-08-18 12:16:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 12:16:19,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:19,704 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:19,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:16:19,704 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash -801825860, now seen corresponding path program 1 times [2020-08-18 12:16:19,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:19,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562457229] [2020-08-18 12:16:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:16:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 12:16:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:16:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:16:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 12:16:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:16:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:16:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 12:16:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-18 12:16:19,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562457229] [2020-08-18 12:16:19,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:19,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 12:16:19,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045250440] [2020-08-18 12:16:19,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:16:19,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:19,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:16:19,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:16:19,902 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2020-08-18 12:16:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:20,090 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-08-18 12:16:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 12:16:20,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-08-18 12:16:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:20,092 INFO L225 Difference]: With dead ends: 74 [2020-08-18 12:16:20,092 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 12:16:20,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:16:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 12:16:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 12:16:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 12:16:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-08-18 12:16:20,105 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2020-08-18 12:16:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:20,106 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-08-18 12:16:20,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:16:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-08-18 12:16:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 12:16:20,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:20,108 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:20,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:16:20,108 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:20,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1730547273, now seen corresponding path program 1 times [2020-08-18 12:16:20,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:20,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234117266] [2020-08-18 12:16:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:16:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 12:16:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:16:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:16:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 12:16:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:16:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:16:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 12:16:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 12:16:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 12:16:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-08-18 12:16:20,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234117266] [2020-08-18 12:16:20,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:20,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 12:16:20,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498272199] [2020-08-18 12:16:20,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:16:20,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:20,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:16:20,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:16:20,286 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2020-08-18 12:16:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:20,453 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-08-18 12:16:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:16:20,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-08-18 12:16:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:20,455 INFO L225 Difference]: With dead ends: 72 [2020-08-18 12:16:20,455 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 12:16:20,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:16:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 12:16:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 12:16:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 12:16:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 12:16:20,457 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-08-18 12:16:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:20,457 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 12:16:20,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:16:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 12:16:20,458 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 12:16:20,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:16:20,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 12:16:20,816 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 12:16:20,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:16:20,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:16:20,817 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 12:16:20,817 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 12:16:20,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 12:16:20,817 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 12:16:20,817 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 12:16:20,817 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 12:16:20,818 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 12:16:20,818 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,818 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-08-18 12:16:20,818 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed. [2020-08-18 12:16:20,818 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 54) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,819 INFO L268 CegarLoopResult]: For program point L23-3(lines 23 54) no Hoare annotation was computed. [2020-08-18 12:16:20,819 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,819 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,819 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-08-18 12:16:20,819 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-08-18 12:16:20,819 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 53) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,820 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-18 12:16:20,820 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-08-18 12:16:20,820 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,820 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,820 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,821 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,821 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,821 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,821 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed. [2020-08-18 12:16:20,822 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,822 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed. [2020-08-18 12:16:20,822 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-18 12:16:20,822 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-08-18 12:16:20,822 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,822 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-08-18 12:16:20,823 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,823 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,823 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,823 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,824 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 12:16:20,824 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 12:16:20,824 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 12:16:20,824 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 12:16:20,824 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 12:16:20,824 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 12:16:20,825 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 12:16:20,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:16:20 BoogieIcfgContainer [2020-08-18 12:16:20,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:16:20,848 INFO L168 Benchmark]: Toolchain (without parser) took 3827.35 ms. Allocated memory was 147.3 MB in the beginning and 243.3 MB in the end (delta: 95.9 MB). Free memory was 103.5 MB in the beginning and 108.5 MB in the end (delta: -5.0 MB). Peak memory consumption was 91.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:20,849 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 12:16:20,850 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.80 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:20,851 INFO L168 Benchmark]: Boogie Preprocessor took 148.67 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.3 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:20,852 INFO L168 Benchmark]: RCFGBuilder took 336.37 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 164.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:20,853 INFO L168 Benchmark]: TraceAbstraction took 3050.76 ms. Allocated memory was 203.4 MB in the beginning and 243.3 MB in the end (delta: 39.8 MB). Free memory was 164.3 MB in the beginning and 108.5 MB in the end (delta: 55.8 MB). Peak memory consumption was 95.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:20,857 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.80 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.67 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.3 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.37 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 164.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3050.76 ms. Allocated memory was 203.4 MB in the beginning and 243.3 MB in the end (delta: 39.8 MB). Free memory was 164.3 MB in the beginning and 108.5 MB in the end (delta: 55.8 MB). Peak memory consumption was 95.6 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: 24]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i + 1 <= len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 104 SDslu, 1002 SDs, 0 SdLazy, 517 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, 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, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 368 HoareAnnotationTreeSize, 55 FomulaSimplifications, 534 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 60 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23622 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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...