/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:28:15,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:28:15,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:28:15,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 11:28:15,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:28:15,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:28:15,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:28:15,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:28:15,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:28:15,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:28:15,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:28:15,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:28:15,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:28:15,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:28:15,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:28:15,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:28:15,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 11:28:16,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:28:16,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:28:16,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:28:16,007 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 11:28:16,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:28:16,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:28:16,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:28:16,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:28:16,032 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:28:16,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:28:16,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:28:16,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:28:16,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:28:16,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:28:16,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:28:16,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:28:16,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:28:16,034 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:28:16,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:28:16,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:28:16,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:28:16,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:28:16,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:28:16,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:28:16,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:28:16,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:28:16,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:28:16,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:28:16,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:28:16,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:28:16,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:28:16,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:28:16,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:28:16,037 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 [2020-08-18 11:28:16,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:28:16,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:28:16,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:28:16,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:28:16,363 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:28:16,366 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-18 11:28:16,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56c2e2c0b/fc6d6638ea89462e94bacd382430d28d/FLAGeb6f4e29f [2020-08-18 11:28:16,937 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:28:16,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-18 11:28:16,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56c2e2c0b/fc6d6638ea89462e94bacd382430d28d/FLAGeb6f4e29f [2020-08-18 11:28:17,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56c2e2c0b/fc6d6638ea89462e94bacd382430d28d [2020-08-18 11:28:17,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:28:17,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:28:17,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:28:17,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:28:17,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:28:17,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae4bde5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17, skipping insertion in model container [2020-08-18 11:28:17,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:28:17,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:28:17,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:28:17,540 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:28:17,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:28:17,575 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:28:17,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17 WrapperNode [2020-08-18 11:28:17,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:28:17,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:28:17,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:28:17,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:28:17,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (1/1) ... [2020-08-18 11:28:17,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:28:17,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:28:17,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:28:17,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:28:17,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (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 11:28:17,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:28:17,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:28:17,769 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 11:28:17,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 11:28:17,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:28:17,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:28:17,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 11:28:17,772 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 11:28:17,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 11:28:17,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:28:17,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:28:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:28:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:28:18,021 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:28:18,021 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 11:28:18,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:28:18 BoogieIcfgContainer [2020-08-18 11:28:18,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:28:18,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:28:18,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:28:18,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:28:18,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:28:17" (1/3) ... [2020-08-18 11:28:18,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d877e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:28:18, skipping insertion in model container [2020-08-18 11:28:18,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:28:17" (2/3) ... [2020-08-18 11:28:18,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d877e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:28:18, skipping insertion in model container [2020-08-18 11:28:18,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:28:18" (3/3) ... [2020-08-18 11:28:18,035 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-08-18 11:28:18,047 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:28:18,063 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:28:18,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:28:18,164 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:28:18,164 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:28:18,164 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:28:18,164 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:28:18,165 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:28:18,165 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:28:18,165 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:28:18,165 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:28:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 11:28:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 11:28:18,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:18,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:28:18,195 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-08-18 11:28:18,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:18,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895643188] [2020-08-18 11:28:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:18,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:18,321 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 11:28:18,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895643188] [2020-08-18 11:28:18,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:28:18,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 11:28:18,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449318195] [2020-08-18 11:28:18,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 11:28:18,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 11:28:18,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 11:28:18,349 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-08-18 11:28:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:18,381 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-08-18 11:28:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 11:28:18,383 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-18 11:28:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:18,394 INFO L225 Difference]: With dead ends: 61 [2020-08-18 11:28:18,394 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 11:28:18,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 11:28:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 11:28:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-18 11:28:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 11:28:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-08-18 11:28:18,448 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-08-18 11:28:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:18,449 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-08-18 11:28:18,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 11:28:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-08-18 11:28:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 11:28:18,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:18,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:28:18,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:28:18,452 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-08-18 11:28:18,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:18,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719867090] [2020-08-18 11:28:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:18,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:18,565 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 11:28:18,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719867090] [2020-08-18 11:28:18,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:28:18,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:28:18,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721541589] [2020-08-18 11:28:18,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:28:18,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:18,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:28:18,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:28:18,570 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-08-18 11:28:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:18,665 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-18 11:28:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:28:18,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-18 11:28:18,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:18,667 INFO L225 Difference]: With dead ends: 35 [2020-08-18 11:28:18,667 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 11:28:18,669 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 11:28:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 11:28:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 11:28:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 11:28:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-08-18 11:28:18,681 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-08-18 11:28:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:18,682 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-08-18 11:28:18,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:28:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-08-18 11:28:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 11:28:18,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:18,683 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:28:18,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:28:18,684 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-08-18 11:28:18,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:18,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239329072] [2020-08-18 11:28:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:18,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:18,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:28:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:18,792 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 11:28:18,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239329072] [2020-08-18 11:28:18,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:28:18,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:28:18,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198908401] [2020-08-18 11:28:18,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:28:18,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:18,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:28:18,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:28:18,796 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-08-18 11:28:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:18,925 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-18 11:28:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 11:28:18,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 11:28:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:18,927 INFO L225 Difference]: With dead ends: 48 [2020-08-18 11:28:18,928 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 11:28:18,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 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 11:28:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 11:28:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-18 11:28:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 11:28:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-18 11:28:18,943 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-08-18 11:28:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:18,943 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-18 11:28:18,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:28:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-18 11:28:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 11:28:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:18,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:28:18,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:28:18,946 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-08-18 11:28:18,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:18,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864757617] [2020-08-18 11:28:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:28:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 11:28:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,033 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 11:28:19,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864757617] [2020-08-18 11:28:19,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:28:19,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:28:19,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686895512] [2020-08-18 11:28:19,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:28:19,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:28:19,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:28:19,040 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-08-18 11:28:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:19,170 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-18 11:28:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 11:28:19,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 11:28:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:19,173 INFO L225 Difference]: With dead ends: 55 [2020-08-18 11:28:19,173 INFO L226 Difference]: Without dead ends: 53 [2020-08-18 11:28:19,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:28:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-18 11:28:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-08-18 11:28:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 11:28:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-08-18 11:28:19,188 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-08-18 11:28:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:19,200 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-08-18 11:28:19,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:28:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-08-18 11:28:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 11:28:19,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:19,203 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, 1, 1, 1] [2020-08-18 11:28:19,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:28:19,204 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-08-18 11:28:19,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:19,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970134028] [2020-08-18 11:28:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 11:28:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:28:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 11:28:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,327 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 11:28:19,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970134028] [2020-08-18 11:28:19,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:28:19,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:28:19,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414662639] [2020-08-18 11:28:19,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:28:19,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:28:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:28:19,330 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-08-18 11:28:19,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:19,518 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-18 11:28:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:28:19,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-18 11:28:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:19,521 INFO L225 Difference]: With dead ends: 70 [2020-08-18 11:28:19,521 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 11:28:19,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 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 11:28:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 11:28:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-18 11:28:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 11:28:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-08-18 11:28:19,535 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-08-18 11:28:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:19,536 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-08-18 11:28:19,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:28:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-08-18 11:28:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 11:28:19,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:19,538 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, 1, 1, 1, 1, 1] [2020-08-18 11:28:19,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:28:19,538 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:19,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-08-18 11:28:19,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:19,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148936879] [2020-08-18 11:28:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:28:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 11:28:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:28:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,664 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 11:28:19,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148936879] [2020-08-18 11:28:19,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:28:19,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:28:19,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290177588] [2020-08-18 11:28:19,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:28:19,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:19,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:28:19,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:28:19,667 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-08-18 11:28:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:19,851 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-08-18 11:28:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:28:19,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-18 11:28:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:19,853 INFO L225 Difference]: With dead ends: 72 [2020-08-18 11:28:19,853 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 11:28:19,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:28:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 11:28:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-18 11:28:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 11:28:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-18 11:28:19,866 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-08-18 11:28:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:19,867 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-18 11:28:19,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:28:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-18 11:28:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 11:28:19,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:19,869 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 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 11:28:19,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:28:19,870 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:19,870 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-08-18 11:28:19,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:19,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760718180] [2020-08-18 11:28:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:28:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 11:28:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:28:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:28:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 11:28:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 11:28:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:28:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 11:28:20,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760718180] [2020-08-18 11:28:20,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:28:20,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:28:20,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963878749] [2020-08-18 11:28:20,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:28:20,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:28:20,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:28:20,030 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-08-18 11:28:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:20,412 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-08-18 11:28:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:28:20,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-18 11:28:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:20,416 INFO L225 Difference]: With dead ends: 96 [2020-08-18 11:28:20,416 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 11:28:20,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-18 11:28:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 11:28:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-08-18 11:28:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 11:28:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-08-18 11:28:20,432 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 56 [2020-08-18 11:28:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:20,432 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-08-18 11:28:20,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:28:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-08-18 11:28:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 11:28:20,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:20,434 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:28:20,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:28:20,435 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-08-18 11:28:20,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:20,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375011559] [2020-08-18 11:28:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:28:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 11:28:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:28:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:28:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:28:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 11:28:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:28:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 11:28:20,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375011559] [2020-08-18 11:28:20,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:28:20,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:28:20,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486999294] [2020-08-18 11:28:20,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:28:20,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:20,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:28:20,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:28:20,551 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-08-18 11:28:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:20,741 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-08-18 11:28:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:28:20,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-18 11:28:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:20,744 INFO L225 Difference]: With dead ends: 89 [2020-08-18 11:28:20,744 INFO L226 Difference]: Without dead ends: 87 [2020-08-18 11:28:20,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:28:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-18 11:28:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-18 11:28:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 11:28:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-08-18 11:28:20,757 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 58 [2020-08-18 11:28:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:20,758 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-08-18 11:28:20,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:28:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-08-18 11:28:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 11:28:20,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:20,760 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:28:20,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:28:20,760 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash 269972457, now seen corresponding path program 2 times [2020-08-18 11:28:20,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:20,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62322187] [2020-08-18 11:28:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:28:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 11:28:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:28:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:28:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:28:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 11:28:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:28:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 11:28:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 11:28:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 11:28:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 11:28:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-08-18 11:28:20,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62322187] [2020-08-18 11:28:20,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:28:20,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:28:20,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323246897] [2020-08-18 11:28:20,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:28:20,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:28:20,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:28:20,978 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-08-18 11:28:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:21,131 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-18 11:28:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:28:21,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-18 11:28:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:21,135 INFO L225 Difference]: With dead ends: 88 [2020-08-18 11:28:21,135 INFO L226 Difference]: Without dead ends: 79 [2020-08-18 11:28:21,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:28:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-18 11:28:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-18 11:28:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 11:28:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-18 11:28:21,147 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 81 [2020-08-18 11:28:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:21,147 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-18 11:28:21,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:28:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-18 11:28:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 11:28:21,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:21,149 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:28:21,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:28:21,150 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:21,150 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-08-18 11:28:21,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:21,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136603313] [2020-08-18 11:28:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:28:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 11:28:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:28:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:28:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:28:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 11:28:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:28:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 11:28:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 11:28:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 11:28:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 11:28:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-18 11:28:21,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136603313] [2020-08-18 11:28:21,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:28:21,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 11:28:21,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371076063] [2020-08-18 11:28:21,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:28:21,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:21,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:28:21,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:28:21,384 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2020-08-18 11:28:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:21,688 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-18 11:28:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 11:28:21,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-18 11:28:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:21,690 INFO L225 Difference]: With dead ends: 92 [2020-08-18 11:28:21,690 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 11:28:21,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:28:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 11:28:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-18 11:28:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 11:28:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-08-18 11:28:21,701 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 83 [2020-08-18 11:28:21,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:21,702 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-08-18 11:28:21,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:28:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-08-18 11:28:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-18 11:28:21,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:28:21,704 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:28:21,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:28:21,704 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:28:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:28:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-08-18 11:28:21,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:28:21,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978404931] [2020-08-18 11:28:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:28:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:28:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:28:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 11:28:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:28:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:28:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:28:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 11:28:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:28:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 11:28:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 11:28:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 11:28:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 11:28:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 11:28:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 11:28:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 11:28:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:21,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 11:28:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:28:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-08-18 11:28:22,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978404931] [2020-08-18 11:28:22,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:28:22,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 11:28:22,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846098456] [2020-08-18 11:28:22,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 11:28:22,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:28:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 11:28:22,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:28:22,015 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 13 states. [2020-08-18 11:28:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:28:22,174 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-08-18 11:28:22,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:28:22,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-18 11:28:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:28:22,175 INFO L225 Difference]: With dead ends: 83 [2020-08-18 11:28:22,175 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 11:28:22,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-08-18 11:28:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 11:28:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 11:28:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 11:28:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 11:28:22,178 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-08-18 11:28:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:28:22,178 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 11:28:22,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 11:28:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 11:28:22,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 11:28:22,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:28:22,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 11:28:22,590 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 11:28:22,591 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 11:28:22,591 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 11:28:22,591 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 11:28:22,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 11:28:22,591 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 11:28:22,592 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 11:28:22,592 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 11:28:22,592 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 11:28:22,592 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 11:28:22,592 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-18 11:28:22,593 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-18 11:28:22,593 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-08-18 11:28:22,593 INFO L264 CegarLoopResult]: At program point L36(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-18 11:28:22,593 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-18 11:28:22,593 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-18 11:28:22,593 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-08-18 11:28:22,594 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-18 11:28:22,594 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-18 11:28:22,594 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-08-18 11:28:22,594 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-08-18 11:28:22,594 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-08-18 11:28:22,595 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-18 11:28:22,595 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-18 11:28:22,595 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-18 11:28:22,595 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-18 11:28:22,595 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-18 11:28:22,596 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-08-18 11:28:22,596 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-18 11:28:22,596 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-18 11:28:22,596 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-18 11:28:22,596 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-18 11:28:22,597 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-18 11:28:22,597 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 11:28:22,597 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 11:28:22,597 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 11:28:22,597 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 11:28:22,597 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 11:28:22,598 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 11:28:22,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:28:22 BoogieIcfgContainer [2020-08-18 11:28:22,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:28:22,623 INFO L168 Benchmark]: Toolchain (without parser) took 5300.79 ms. Allocated memory was 138.4 MB in the beginning and 287.3 MB in the end (delta: 148.9 MB). Free memory was 101.5 MB in the beginning and 159.9 MB in the end (delta: -58.4 MB). Peak memory consumption was 90.5 MB. Max. memory is 7.1 GB. [2020-08-18 11:28:22,625 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 11:28:22,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.82 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:28:22,626 INFO L168 Benchmark]: Boogie Preprocessor took 113.43 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 179.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:28:22,627 INFO L168 Benchmark]: RCFGBuilder took 336.17 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 164.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:28:22,628 INFO L168 Benchmark]: TraceAbstraction took 4592.21 ms. Allocated memory was 201.3 MB in the beginning and 287.3 MB in the end (delta: 86.0 MB). Free memory was 164.0 MB in the beginning and 159.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 90.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:28:22,632 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.82 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.43 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 179.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.17 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 164.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4592.21 ms. Allocated memory was 201.3 MB in the beginning and 287.3 MB in the end (delta: 86.0 MB). Free memory was 164.0 MB in the beginning and 159.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 90.1 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((0 <= buf && buf < buflim + 1) && buflim + 2 <= bufferlen) && in + buflim + 3 <= buf + inlen) && bufferlen + 1 <= inlen) && 0 <= in - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 422 SDtfs, 351 SDslu, 1324 SDs, 0 SdLazy, 750 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 54 PreInvPairs, 91 NumberOfFragments, 206 HoareAnnotationTreeSize, 54 FomulaSimplifications, 1422 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 527 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 516 ConstructedInterpolants, 0 QuantifiedInterpolants, 111624 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1182/1281 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...