/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:43:13,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:43:13,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:43:13,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:43:13,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:43:13,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:43:13,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:43:13,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:43:13,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:43:13,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:43:13,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:43:13,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:43:13,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:43:13,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:43:13,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:43:13,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:43:13,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:43:13,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:43:13,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:43:13,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:43:13,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:43:13,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:43:13,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:43:13,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:43:13,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:43:13,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:43:13,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:43:13,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:43:13,733 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 [2020-09-04 13:43:13,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:43:13,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:43:13,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:43:13,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:43:13,767 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:43:13,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:43:13,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:43:13,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:43:13,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:43:13,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:43:13,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:43:13,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:43:13,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:43:13,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:43:13,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:43:13,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:43:13,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:43:13,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:43:13,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:43:13,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:43:13,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:43:13,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:43:13,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:43:13,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:43:13,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:43:13,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:43:13,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:43:13,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:43:13,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:43:13,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:43:14,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:43:14,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:43:14,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:43:14,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:43:14,355 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:43:14,357 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-04 13:43:14,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e25cdf79e/38d261287dc245d2ad44833a090ea1eb/FLAGc01ca0fd1 [2020-09-04 13:43:15,154 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:43:15,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-04 13:43:15,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e25cdf79e/38d261287dc245d2ad44833a090ea1eb/FLAGc01ca0fd1 [2020-09-04 13:43:15,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e25cdf79e/38d261287dc245d2ad44833a090ea1eb [2020-09-04 13:43:15,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:43:15,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:43:15,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:15,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:43:15,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:43:15,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:15,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4184b862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15, skipping insertion in model container [2020-09-04 13:43:15,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:15,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:43:15,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:43:15,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:15,849 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:43:15,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:15,887 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:43:15,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15 WrapperNode [2020-09-04 13:43:15,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:15,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:43:15,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:43:15,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:43:15,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:15,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:15,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:15,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:16,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:16,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:16,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (1/1) ... [2020-09-04 13:43:16,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:43:16,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:43:16,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:43:16,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:43:16,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (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 [2020-09-04 13:43:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:43:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:43:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:43:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:43:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:43:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:43:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 13:43:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:43:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:43:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:43:16,364 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:43:16,364 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 13:43:16,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:16 BoogieIcfgContainer [2020-09-04 13:43:16,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:43:16,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:43:16,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:43:16,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:43:16,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:43:15" (1/3) ... [2020-09-04 13:43:16,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c9436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:16, skipping insertion in model container [2020-09-04 13:43:16,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:15" (2/3) ... [2020-09-04 13:43:16,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c9436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:16, skipping insertion in model container [2020-09-04 13:43:16,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:16" (3/3) ... [2020-09-04 13:43:16,384 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-04 13:43:16,402 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:43:16,414 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:43:16,446 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:43:16,506 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:43:16,507 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:43:16,507 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:43:16,507 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:43:16,508 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:43:16,508 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:43:16,508 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:43:16,508 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:43:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-04 13:43:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-04 13:43:16,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:16,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:16,557 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:16,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-09-04 13:43:16,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:16,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108772072] [2020-09-04 13:43:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:16,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:16,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108772072] [2020-09-04 13:43:16,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:16,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 13:43:16,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383094819] [2020-09-04 13:43:16,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 13:43:16,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 13:43:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 13:43:16,791 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-09-04 13:43:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:16,827 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-09-04 13:43:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 13:43:16,829 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-04 13:43:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:16,843 INFO L225 Difference]: With dead ends: 30 [2020-09-04 13:43:16,843 INFO L226 Difference]: Without dead ends: 13 [2020-09-04 13:43:16,849 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 [2020-09-04 13:43:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-04 13:43:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-04 13:43:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-04 13:43:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-04 13:43:16,911 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-09-04 13:43:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:16,912 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-04 13:43:16,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 13:43:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-04 13:43:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-04 13:43:16,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:16,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:16,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:43:16,915 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-09-04 13:43:16,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:16,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155828863] [2020-09-04 13:43:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:17,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:17,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155828863] [2020-09-04 13:43:17,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:17,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:43:17,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775533143] [2020-09-04 13:43:17,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:43:17,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:43:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:17,050 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-09-04 13:43:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:17,113 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-09-04 13:43:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:43:17,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-04 13:43:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:17,115 INFO L225 Difference]: With dead ends: 19 [2020-09-04 13:43:17,116 INFO L226 Difference]: Without dead ends: 14 [2020-09-04 13:43:17,117 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 [2020-09-04 13:43:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-04 13:43:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-04 13:43:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-04 13:43:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-09-04 13:43:17,124 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-09-04 13:43:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:17,124 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-09-04 13:43:17,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:43:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-09-04 13:43:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:43:17,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:17,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:17,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:43:17,126 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2020-09-04 13:43:17,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:17,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703857230] [2020-09-04 13:43:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:17,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:17,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703857230] [2020-09-04 13:43:17,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039878806] [2020-09-04 13:43:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:17,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:43:17,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:17,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:43:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:17,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:43:17,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-09-04 13:43:17,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858253775] [2020-09-04 13:43:17,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:43:17,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:17,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:43:17,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:43:17,809 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 14 states. [2020-09-04 13:43:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:18,022 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-09-04 13:43:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:43:18,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-09-04 13:43:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:18,023 INFO L225 Difference]: With dead ends: 32 [2020-09-04 13:43:18,024 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 13:43:18,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:43:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 13:43:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-04 13:43:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-04 13:43:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-09-04 13:43:18,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-09-04 13:43:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:18,032 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-09-04 13:43:18,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:43:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-09-04 13:43:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 13:43:18,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:18,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:18,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:43:18,250 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-09-04 13:43:18,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:18,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434687647] [2020-09-04 13:43:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:18,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:18,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434687647] [2020-09-04 13:43:18,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188082104] [2020-09-04 13:43:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:43:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:18,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:43:18,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-09-04 13:43:18,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885565351] [2020-09-04 13:43:18,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:43:18,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:43:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:18,351 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-09-04 13:43:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:18,383 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-09-04 13:43:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:43:18,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-04 13:43:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:18,384 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:43:18,384 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 13:43:18,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 13:43:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-04 13:43:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-04 13:43:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-04 13:43:18,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-09-04 13:43:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:18,391 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-04 13:43:18,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:43:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-04 13:43:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 13:43:18,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:18,393 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:18,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:18,598 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:18,599 INFO L82 PathProgramCache]: Analyzing trace with hash 370288085, now seen corresponding path program 2 times [2020-09-04 13:43:18,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:18,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321348639] [2020-09-04 13:43:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:18,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:43:18,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321348639] [2020-09-04 13:43:18,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435929737] [2020-09-04 13:43:18,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 13:43:18,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:43:18,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:43:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:19,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:43:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:19,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:43:19,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2020-09-04 13:43:19,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922136630] [2020-09-04 13:43:19,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 13:43:19,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:19,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 13:43:19,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:43:19,178 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 19 states. [2020-09-04 13:43:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:19,627 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-09-04 13:43:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:43:19,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-09-04 13:43:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:19,629 INFO L225 Difference]: With dead ends: 38 [2020-09-04 13:43:19,629 INFO L226 Difference]: Without dead ends: 26 [2020-09-04 13:43:19,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2020-09-04 13:43:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-04 13:43:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-04 13:43:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:43:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-04 13:43:19,638 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-09-04 13:43:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:19,638 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-04 13:43:19,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 13:43:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-04 13:43:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:43:19,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:19,640 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:19,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:19,854 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:19,855 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 2 times [2020-09-04 13:43:19,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:19,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809040139] [2020-09-04 13:43:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:43:19,877 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:43:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:43:19,896 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:43:19,925 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:43:19,926 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:43:19,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 13:43:19,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:43:19 BoogieIcfgContainer [2020-09-04 13:43:19,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:43:19,971 INFO L168 Benchmark]: Toolchain (without parser) took 4461.25 ms. Allocated memory was 138.4 MB in the beginning and 232.3 MB in the end (delta: 93.8 MB). Free memory was 101.8 MB in the beginning and 78.2 MB in the end (delta: 23.6 MB). Peak memory consumption was 117.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:19,972 INFO L168 Benchmark]: CDTParser took 1.68 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. [2020-09-04 13:43:19,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.43 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:19,974 INFO L168 Benchmark]: Boogie Preprocessor took 138.40 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.3 MB in the beginning and 179.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:19,975 INFO L168 Benchmark]: RCFGBuilder took 343.58 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:19,976 INFO L168 Benchmark]: TraceAbstraction took 3593.25 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 167.1 MB in the beginning and 78.2 MB in the end (delta: 88.8 MB). Peak memory consumption was 120.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:19,981 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.68 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 376.43 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.40 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.3 MB in the beginning and 179.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.58 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3593.25 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 167.1 MB in the beginning and 78.2 MB in the end (delta: 88.8 MB). Peak memory consumption was 120.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=4, n=2] [L15] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L13] i++ VAL [i=2, n=2, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=4, n=6] [L15] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L13] i++ VAL [i=4, n=6, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=4, n=8] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=-10, n=4] [L13] i++ VAL [i=5, n=4, n=-10] [L13] COND FALSE !(i<=n) VAL [i=5, n=-10, n=4] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 17 SDslu, 195 SDs, 0 SdLazy, 286 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 7806 SizeOfPredicates, 7 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 11/36 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 incorrect! Received shutdown request...