/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:36:10,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:36:10,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:36:10,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:36:10,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:36:10,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:36:10,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:36:10,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:36:10,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:36:10,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:36:10,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:36:10,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:36:10,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:36:10,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:36:10,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:36:10,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:36:10,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:36:10,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:36:10,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:36:10,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:36:10,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:36:10,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:36:10,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:36:10,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:36:10,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 15:36:10,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 15:36:10,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 15:36:10,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 15:36:10,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 15:36:10,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 15:36:10,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 15:36:10,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 15:36:10,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 15:36:10,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 15:36:10,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 15:36:10,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 15:36:10,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 15:36:10,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 15:36:10,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:36:10,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:36:10,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:36:10,723 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 15:36:10,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:36:10,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:36:10,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:36:10,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:36:10,756 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:36:10,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:36:10,756 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:36:10,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:36:10,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:36:10,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:36:10,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:36:10,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:36:10,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:36:10,758 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:36:10,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:36:10,758 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:36:10,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:36:10,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:36:10,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:36:10,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:36:10,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:36:10,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:36:10,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:36:10,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:36:10,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:36:10,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:36:10,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:36:10,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:36:10,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:36:10,761 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 -> false [2020-08-18 15:36:11,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:36:11,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:36:11,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:36:11,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:36:11,081 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:36:11,082 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-08-18 15:36:11,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85368b6dd/967dce4ec937429784ee336763cab036/FLAGf922eac58 [2020-08-18 15:36:11,571 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:36:11,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-08-18 15:36:11,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85368b6dd/967dce4ec937429784ee336763cab036/FLAGf922eac58 [2020-08-18 15:36:11,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85368b6dd/967dce4ec937429784ee336763cab036 [2020-08-18 15:36:11,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:36:11,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:36:11,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:36:11,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:36:11,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:36:11,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:36:11" (1/1) ... [2020-08-18 15:36:11,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d198e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:11, skipping insertion in model container [2020-08-18 15:36:11,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:36:11" (1/1) ... [2020-08-18 15:36:11,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:36:12,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:36:12,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:36:12,205 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:36:12,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:36:12,239 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:36:12,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12 WrapperNode [2020-08-18 15:36:12,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:36:12,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:36:12,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:36:12,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:36:12,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (1/1) ... [2020-08-18 15:36:12,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (1/1) ... [2020-08-18 15:36:12,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (1/1) ... [2020-08-18 15:36:12,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (1/1) ... [2020-08-18 15:36:12,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (1/1) ... [2020-08-18 15:36:12,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (1/1) ... [2020-08-18 15:36:12,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (1/1) ... [2020-08-18 15:36:12,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:36:12,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:36:12,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:36:12,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:36:12,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (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 15:36:12,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:36:12,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:36:12,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 15:36:12,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 15:36:12,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:36:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:36:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 15:36:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 15:36:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 15:36:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:36:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:36:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:36:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:36:12,701 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:36:12,701 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 15:36:12,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:36:12 BoogieIcfgContainer [2020-08-18 15:36:12,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:36:12,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:36:12,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:36:12,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:36:12,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:36:11" (1/3) ... [2020-08-18 15:36:12,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687b29a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:36:12, skipping insertion in model container [2020-08-18 15:36:12,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:36:12" (2/3) ... [2020-08-18 15:36:12,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687b29a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:36:12, skipping insertion in model container [2020-08-18 15:36:12,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:36:12" (3/3) ... [2020-08-18 15:36:12,738 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-08-18 15:36:12,764 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:36:12,775 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:36:12,786 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:36:12,812 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:36:12,812 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:36:12,812 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:36:12,812 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:36:12,812 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:36:12,813 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:36:12,813 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:36:12,813 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:36:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-08-18 15:36:12,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 15:36:12,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:36:12,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:36:12,840 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:36:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:36:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1128800291, now seen corresponding path program 1 times [2020-08-18 15:36:12,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:36:12,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050949983] [2020-08-18 15:36:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:36:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:36:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,070 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 15:36:13,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050949983] [2020-08-18 15:36:13,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:36:13,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:36:13,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989975808] [2020-08-18 15:36:13,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:36:13,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:36:13,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:36:13,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:36:13,099 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-08-18 15:36:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:36:13,310 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions. [2020-08-18 15:36:13,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:36:13,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 15:36:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:36:13,324 INFO L225 Difference]: With dead ends: 87 [2020-08-18 15:36:13,325 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 15:36:13,330 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 15:36:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 15:36:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 15:36:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 15:36:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-18 15:36:13,386 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2020-08-18 15:36:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:36:13,387 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-18 15:36:13,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:36:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-18 15:36:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 15:36:13,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:36:13,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:36:13,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:36:13,390 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:36:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:36:13,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1106844324, now seen corresponding path program 1 times [2020-08-18 15:36:13,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:36:13,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276925966] [2020-08-18 15:36:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:36:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:36:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,476 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 15:36:13,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276925966] [2020-08-18 15:36:13,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:36:13,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:36:13,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712306192] [2020-08-18 15:36:13,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:36:13,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:36:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:36:13,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:36:13,489 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-08-18 15:36:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:36:13,623 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-08-18 15:36:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:36:13,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 15:36:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:36:13,627 INFO L225 Difference]: With dead ends: 54 [2020-08-18 15:36:13,628 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 15:36:13,629 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 15:36:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 15:36:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-08-18 15:36:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 15:36:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2020-08-18 15:36:13,643 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2020-08-18 15:36:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:36:13,643 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2020-08-18 15:36:13,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:36:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2020-08-18 15:36:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:36:13,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:36:13,645 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:36:13,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:36:13,645 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:36:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:36:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1247762898, now seen corresponding path program 1 times [2020-08-18 15:36:13,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:36:13,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378660363] [2020-08-18 15:36:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:36:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:36:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:36:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,731 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 15:36:13,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378660363] [2020-08-18 15:36:13,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:36:13,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:36:13,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397812645] [2020-08-18 15:36:13,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:36:13,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:36:13,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:36:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:36:13,734 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2020-08-18 15:36:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:36:13,853 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 15:36:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:36:13,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 15:36:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:36:13,855 INFO L225 Difference]: With dead ends: 56 [2020-08-18 15:36:13,856 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 15:36:13,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:36:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 15:36:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 15:36:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 15:36:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-08-18 15:36:13,871 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2020-08-18 15:36:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:36:13,871 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-08-18 15:36:13,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:36:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-08-18 15:36:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 15:36:13,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:36:13,873 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:36:13,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:36:13,874 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:36:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:36:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2050697988, now seen corresponding path program 1 times [2020-08-18 15:36:13,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:36:13,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053065289] [2020-08-18 15:36:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:36:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:36:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:36:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 15:36:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:13,988 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 15:36:13,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053065289] [2020-08-18 15:36:13,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:36:13,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 15:36:13,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843724748] [2020-08-18 15:36:13,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:36:13,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:36:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:36:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:36:13,990 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2020-08-18 15:36:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:36:14,135 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-08-18 15:36:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:36:14,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-18 15:36:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:36:14,137 INFO L225 Difference]: With dead ends: 60 [2020-08-18 15:36:14,138 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 15:36:14,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:36:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 15:36:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-18 15:36:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 15:36:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-08-18 15:36:14,151 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2020-08-18 15:36:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:36:14,151 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-08-18 15:36:14,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:36:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-08-18 15:36:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 15:36:14,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:36:14,153 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:36:14,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:36:14,153 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:36:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:36:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash -35497745, now seen corresponding path program 1 times [2020-08-18 15:36:14,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:36:14,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364715624] [2020-08-18 15:36:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:36:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:36:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:36:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 15:36:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 15:36:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,274 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 15:36:14,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364715624] [2020-08-18 15:36:14,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:36:14,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:36:14,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207841973] [2020-08-18 15:36:14,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:36:14,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:36:14,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:36:14,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:36:14,277 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-08-18 15:36:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:36:14,363 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-08-18 15:36:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:36:14,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-18 15:36:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:36:14,365 INFO L225 Difference]: With dead ends: 65 [2020-08-18 15:36:14,365 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 15:36:14,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:36:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 15:36:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-08-18 15:36:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 15:36:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-18 15:36:14,378 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2020-08-18 15:36:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:36:14,378 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-18 15:36:14,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:36:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-18 15:36:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 15:36:14,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:36:14,380 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:36:14,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:36:14,381 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:36:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:36:14,381 INFO L82 PathProgramCache]: Analyzing trace with hash 663071772, now seen corresponding path program 1 times [2020-08-18 15:36:14,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:36:14,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833393828] [2020-08-18 15:36:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:36:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:36:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:36:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 15:36:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 15:36:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 15:36:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 15:36:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 15:36:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-18 15:36:14,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833393828] [2020-08-18 15:36:14,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:36:14,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 15:36:14,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650820554] [2020-08-18 15:36:14,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:36:14,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:36:14,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:36:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:36:14,504 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2020-08-18 15:36:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:36:14,645 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-08-18 15:36:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:36:14,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-08-18 15:36:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:36:14,648 INFO L225 Difference]: With dead ends: 74 [2020-08-18 15:36:14,648 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 15:36:14,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:36:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 15:36:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-08-18 15:36:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 15:36:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-08-18 15:36:14,660 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2020-08-18 15:36:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:36:14,661 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-08-18 15:36:14,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:36:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-08-18 15:36:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 15:36:14,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:36:14,663 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:36:14,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:36:14,664 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:36:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:36:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash -801825860, now seen corresponding path program 1 times [2020-08-18 15:36:14,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:36:14,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748132946] [2020-08-18 15:36:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:36:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:36:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:36:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 15:36:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 15:36:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 15:36:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 15:36:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 15:36:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 15:36:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 15:36:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-18 15:36:14,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748132946] [2020-08-18 15:36:14,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:36:14,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 15:36:14,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40094025] [2020-08-18 15:36:14,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:36:14,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:36:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:36:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:36:14,857 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2020-08-18 15:36:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:36:15,051 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-08-18 15:36:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:36:15,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-08-18 15:36:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:36:15,053 INFO L225 Difference]: With dead ends: 74 [2020-08-18 15:36:15,053 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 15:36:15,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:36:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 15:36:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 15:36:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 15:36:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-08-18 15:36:15,072 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2020-08-18 15:36:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:36:15,073 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-08-18 15:36:15,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:36:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-08-18 15:36:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 15:36:15,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:36:15,075 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:36:15,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:36:15,075 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:36:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:36:15,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1730547273, now seen corresponding path program 1 times [2020-08-18 15:36:15,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:36:15,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199331092] [2020-08-18 15:36:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:36:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:36:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 15:36:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 15:36:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 15:36:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 15:36:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 15:36:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 15:36:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 15:36:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 15:36:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 15:36:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 15:36:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:36:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-08-18 15:36:15,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199331092] [2020-08-18 15:36:15,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:36:15,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 15:36:15,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812167003] [2020-08-18 15:36:15,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:36:15,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:36:15,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:36:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:36:15,210 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2020-08-18 15:36:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:36:15,401 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-08-18 15:36:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:36:15,402 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-08-18 15:36:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:36:15,402 INFO L225 Difference]: With dead ends: 72 [2020-08-18 15:36:15,403 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:36:15,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:36:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:36:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:36:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:36:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:36:15,406 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-08-18 15:36:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:36:15,406 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:36:15,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:36:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:36:15,407 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:36:15,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:36:15,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:36:15,785 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 15:36:15,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:36:15,786 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:36:15,786 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 15:36:15,786 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 15:36:15,786 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 15:36:15,786 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 15:36:15,786 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 15:36:15,786 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 15:36:15,786 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 15:36:15,787 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,787 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-08-18 15:36:15,787 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed. [2020-08-18 15:36:15,787 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 54) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,787 INFO L268 CegarLoopResult]: For program point L23-3(lines 23 54) no Hoare annotation was computed. [2020-08-18 15:36:15,788 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,788 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,788 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-08-18 15:36:15,788 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-08-18 15:36:15,788 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 53) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,788 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-18 15:36:15,789 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-08-18 15:36:15,789 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,789 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,789 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,789 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,790 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,790 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,790 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed. [2020-08-18 15:36:15,790 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,790 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed. [2020-08-18 15:36:15,791 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-18 15:36:15,791 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-08-18 15:36:15,791 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,791 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-08-18 15:36:15,791 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,792 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,792 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,792 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,792 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 15:36:15,793 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 15:36:15,793 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 15:36:15,793 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 15:36:15,793 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 15:36:15,793 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 15:36:15,793 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 15:36:15,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:36:15 BoogieIcfgContainer [2020-08-18 15:36:15,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:36:15,817 INFO L168 Benchmark]: Toolchain (without parser) took 3851.63 ms. Allocated memory was 147.3 MB in the beginning and 243.8 MB in the end (delta: 96.5 MB). Free memory was 103.8 MB in the beginning and 112.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 87.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:36:15,818 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 15:36:15,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.01 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:36:15,819 INFO L168 Benchmark]: Boogie Preprocessor took 121.85 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.4 MB in the beginning and 182.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:36:15,820 INFO L168 Benchmark]: RCFGBuilder took 354.83 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 165.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:36:15,821 INFO L168 Benchmark]: TraceAbstraction took 3094.87 ms. Allocated memory was 203.4 MB in the beginning and 243.8 MB in the end (delta: 40.4 MB). Free memory was 164.9 MB in the beginning and 112.7 MB in the end (delta: 52.2 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:36:15,825 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.01 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.85 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.4 MB in the beginning and 182.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.83 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 165.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3094.87 ms. Allocated memory was 203.4 MB in the beginning and 243.8 MB in the end (delta: 40.4 MB). Free memory was 164.9 MB in the beginning and 112.7 MB in the end (delta: 52.2 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i + 1 <= len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 104 SDslu, 1002 SDs, 0 SdLazy, 517 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 368 HoareAnnotationTreeSize, 55 FomulaSimplifications, 534 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 60 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23622 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...