/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:20:59,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:20:59,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:20:59,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:20:59,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:20:59,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:20:59,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:20:59,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:20:59,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:21:00,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:21:00,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:21:00,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:21:00,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:21:00,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:21:00,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:21:00,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:21:00,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:21:00,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:21:00,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:21:00,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:21:00,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:21:00,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:21:00,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:21:00,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:21:00,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:21:00,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:21:00,141 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:21:00,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:21:00,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:21:00,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:21:00,144 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:21:00,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:21:00,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:21:00,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:21:00,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:21:00,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:21:00,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:21:00,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:21:00,146 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:21:00,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:21:00,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:21:00,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:21:00,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:21:00,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:21:00,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:21:00,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:21:00,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:21:00,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:21:00,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:21:00,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:21:00,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:21:00,149 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:21:00,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:21:00,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:21:00,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:21:00,554 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:21:00,555 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:21:00,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02.i [2020-12-22 04:21:00,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c4bf10a/5123023021d54e988154e4e66d23d53b/FLAG9cde55e0b [2020-12-22 04:21:01,208 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:21:01,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i [2020-12-22 04:21:01,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c4bf10a/5123023021d54e988154e4e66d23d53b/FLAG9cde55e0b [2020-12-22 04:21:01,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c4bf10a/5123023021d54e988154e4e66d23d53b [2020-12-22 04:21:01,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:21:01,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:21:01,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:01,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:21:01,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:21:01,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8540251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01, skipping insertion in model container [2020-12-22 04:21:01,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:21:01,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:21:01,823 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2020-12-22 04:21:01,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:01,850 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:21:01,865 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2020-12-22 04:21:01,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:01,887 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:21:01,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01 WrapperNode [2020-12-22 04:21:01,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:01,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:01,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:21:01,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:21:01,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:01,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:21:01,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:21:01,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:21:01,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... [2020-12-22 04:21:01,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:21:01,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:21:01,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:21:01,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:21:01,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 04:21:02,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:21:02,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:21:02,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:21:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:21:02,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:21:02,318 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:21:02,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:02 BoogieIcfgContainer [2020-12-22 04:21:02,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:21:02,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:21:02,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:21:02,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:21:02,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:21:01" (1/3) ... [2020-12-22 04:21:02,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca09f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:02, skipping insertion in model container [2020-12-22 04:21:02,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:01" (2/3) ... [2020-12-22 04:21:02,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca09f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:02, skipping insertion in model container [2020-12-22 04:21:02,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:02" (3/3) ... [2020-12-22 04:21:02,330 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-12-22 04:21:02,337 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:21:02,344 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:21:02,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:21:02,498 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:21:02,499 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:21:02,499 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:21:02,499 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:21:02,499 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:21:02,499 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:21:02,499 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:21:02,500 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:21:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-22 04:21:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:21:02,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:02,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:21:02,530 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2020-12-22 04:21:02,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:02,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585284754] [2020-12-22 04:21:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:02,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585284754] [2020-12-22 04:21:02,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:02,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:21:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009821621] [2020-12-22 04:21:02,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:21:02,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:02,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:21:02,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:21:02,767 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-22 04:21:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:02,783 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-22 04:21:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:21:02,785 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:21:02,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:02,795 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:21:02,795 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:21:02,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:21:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:21:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:21:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:21:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:21:02,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-22 04:21:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:02,835 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:21:02,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:21:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:21:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:21:02,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:02,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:21:02,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:21:02,836 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:02,839 INFO L82 PathProgramCache]: Analyzing trace with hash 889611988, now seen corresponding path program 1 times [2020-12-22 04:21:02,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:02,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105011300] [2020-12-22 04:21:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:02,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105011300] [2020-12-22 04:21:02,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:02,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:21:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890502694] [2020-12-22 04:21:02,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:21:02,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:02,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:21:02,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:21:02,956 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-12-22 04:21:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:03,003 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-12-22 04:21:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:21:03,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 04:21:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:03,004 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:21:03,004 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:21:03,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:21:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:21:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:21:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 04:21:03,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-12-22 04:21:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:03,011 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 04:21:03,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:21:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 04:21:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:21:03,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:03,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:03,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:21:03,012 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:03,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1711509127, now seen corresponding path program 1 times [2020-12-22 04:21:03,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:03,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473711758] [2020-12-22 04:21:03,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:03,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473711758] [2020-12-22 04:21:03,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167312673] [2020-12-22 04:21:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 04:21:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:21:03,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:03,443 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:03,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:03,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-22 04:21:03,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736594456] [2020-12-22 04:21:03,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:21:03,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:03,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:21:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:21:03,470 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2020-12-22 04:21:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:03,582 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-22 04:21:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:21:03,583 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-22 04:21:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:03,585 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:21:03,586 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:21:03,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:21:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:21:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-12-22 04:21:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:21:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-22 04:21:03,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2020-12-22 04:21:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:03,594 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-22 04:21:03,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:21:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-22 04:21:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:21:03,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:03,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:03,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:21:03,811 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:03,812 INFO L82 PathProgramCache]: Analyzing trace with hash 703766942, now seen corresponding path program 2 times [2020-12-22 04:21:03,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:03,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20216791] [2020-12-22 04:21:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:04,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20216791] [2020-12-22 04:21:04,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812874252] [2020-12-22 04:21:04,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 04:21:04,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:04,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:21:04,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:04,236 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:04,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:04,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:04,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-22 04:21:04,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483729285] [2020-12-22 04:21:04,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:21:04,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:21:04,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:21:04,264 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2020-12-22 04:21:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:04,642 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-12-22 04:21:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:21:04,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-22 04:21:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:04,644 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:21:04,644 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:21:04,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:21:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:21:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-12-22 04:21:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:21:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-22 04:21:04,651 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-12-22 04:21:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:04,651 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-22 04:21:04,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:21:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-22 04:21:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:21:04,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:04,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:04,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:04,867 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:04,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:04,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1816192992, now seen corresponding path program 1 times [2020-12-22 04:21:04,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:04,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598654765] [2020-12-22 04:21:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:04,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598654765] [2020-12-22 04:21:04,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816062755] [2020-12-22 04:21:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:21:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:05,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:05,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 04:21:05,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993215304] [2020-12-22 04:21:05,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:21:05,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:05,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:21:05,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:21:05,069 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 8 states. [2020-12-22 04:21:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:05,101 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-22 04:21:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:21:05,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 04:21:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:05,103 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:21:05,103 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:21:05,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:21:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:21:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 04:21:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:21:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-22 04:21:05,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-12-22 04:21:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:05,110 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-22 04:21:05,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:21:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-22 04:21:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:21:05,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:05,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:05,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:05,327 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:05,332 INFO L82 PathProgramCache]: Analyzing trace with hash -551113275, now seen corresponding path program 2 times [2020-12-22 04:21:05,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:05,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800712020] [2020-12-22 04:21:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:05,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800712020] [2020-12-22 04:21:05,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776662703] [2020-12-22 04:21:05,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:05,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:05,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:05,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:21:05,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:05,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:05,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 04:21:05,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621446716] [2020-12-22 04:21:05,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:21:05,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:05,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:21:05,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:21:05,623 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2020-12-22 04:21:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:05,667 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-22 04:21:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:21:05,668 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-22 04:21:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:05,668 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:21:05,669 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:21:05,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:21:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:21:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 04:21:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:21:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-22 04:21:05,674 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2020-12-22 04:21:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:05,674 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-22 04:21:05,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:21:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-22 04:21:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:21:05,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:05,675 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:05,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:05,889 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:05,890 INFO L82 PathProgramCache]: Analyzing trace with hash -234589592, now seen corresponding path program 3 times [2020-12-22 04:21:05,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:05,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131513426] [2020-12-22 04:21:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:21:06,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131513426] [2020-12-22 04:21:06,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333083605] [2020-12-22 04:21:06,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:06,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:21:06,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:06,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:21:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:06,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:06,359 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:06,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:06,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2020-12-22 04:21:06,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846743034] [2020-12-22 04:21:06,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:21:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:06,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:21:06,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:21:06,388 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2020-12-22 04:21:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:07,125 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-22 04:21:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:21:07,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2020-12-22 04:21:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:07,127 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:21:07,127 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:21:07,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:21:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:21:07,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-12-22 04:21:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:21:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 04:21:07,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2020-12-22 04:21:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:07,134 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 04:21:07,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:21:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 04:21:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:21:07,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:07,135 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:07,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:21:07,352 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1540417770, now seen corresponding path program 3 times [2020-12-22 04:21:07,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:07,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004193004] [2020-12-22 04:21:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:07,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004193004] [2020-12-22 04:21:07,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153401163] [2020-12-22 04:21:07,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:07,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:21:07,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:21:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:07,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:07,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 04:21:07,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434832016] [2020-12-22 04:21:07,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:21:07,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:21:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:21:07,653 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 16 states. [2020-12-22 04:21:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:07,728 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-22 04:21:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:21:07,729 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-12-22 04:21:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:07,730 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:21:07,730 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:21:07,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:21:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:21:07,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-22 04:21:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:21:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 04:21:07,736 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-12-22 04:21:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:07,736 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 04:21:07,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:21:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 04:21:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:21:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:07,738 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:07,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:07,953 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1259402865, now seen corresponding path program 4 times [2020-12-22 04:21:07,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:07,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30501340] [2020-12-22 04:21:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:08,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30501340] [2020-12-22 04:21:08,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886363712] [2020-12-22 04:21:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:08,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:21:08,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:08,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:21:08,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:08,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:08,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-22 04:21:08,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095251213] [2020-12-22 04:21:08,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:21:08,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:21:08,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:21:08,321 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 20 states. [2020-12-22 04:21:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:08,409 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-22 04:21:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:21:08,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-12-22 04:21:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:08,411 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:21:08,411 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:21:08,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:21:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:21:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-12-22 04:21:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:21:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 04:21:08,416 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-12-22 04:21:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:08,417 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 04:21:08,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:21:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 04:21:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:21:08,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:08,418 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:08,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:08,624 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash 454184884, now seen corresponding path program 5 times [2020-12-22 04:21:08,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:08,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524603633] [2020-12-22 04:21:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:21:08,658 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:21:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:21:08,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:21:08,738 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:21:08,738 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:21:08,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 04:21:08,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:21:08 BoogieIcfgContainer [2020-12-22 04:21:08,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:21:08,790 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:21:08,791 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:21:08,791 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:21:08,791 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:02" (3/4) ... [2020-12-22 04:21:08,794 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:21:08,851 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/sum01_bug02.i-witness.graphml [2020-12-22 04:21:08,851 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:21:08,857 INFO L168 Benchmark]: Toolchain (without parser) took 7252.89 ms. Allocated memory was 157.3 MB in the beginning and 195.0 MB in the end (delta: 37.7 MB). Free memory was 132.8 MB in the beginning and 173.7 MB in the end (delta: -40.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:21:08,857 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:21:08,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.44 ms. Allocated memory is still 157.3 MB. Free memory was 132.6 MB in the beginning and 123.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:08,859 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.09 ms. Allocated memory is still 157.3 MB. Free memory was 123.1 MB in the beginning and 121.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:08,859 INFO L168 Benchmark]: Boogie Preprocessor took 24.57 ms. Allocated memory is still 157.3 MB. Free memory was 121.8 MB in the beginning and 120.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:08,860 INFO L168 Benchmark]: RCFGBuilder took 364.28 ms. Allocated memory is still 157.3 MB. Free memory was 120.7 MB in the beginning and 109.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:08,861 INFO L168 Benchmark]: TraceAbstraction took 6467.87 ms. Allocated memory was 157.3 MB in the beginning and 195.0 MB in the end (delta: 37.7 MB). Free memory was 109.2 MB in the beginning and 176.3 MB in the end (delta: -67.1 MB). Peak memory consumption was 81.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:08,862 INFO L168 Benchmark]: Witness Printer took 60.58 ms. Allocated memory is still 195.0 MB. Free memory was 176.3 MB in the beginning and 173.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:08,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.44 ms. Allocated memory is still 157.3 MB. Free memory was 132.6 MB in the beginning and 123.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.09 ms. Allocated memory is still 157.3 MB. Free memory was 123.1 MB in the beginning and 121.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.57 ms. Allocated memory is still 157.3 MB. Free memory was 121.8 MB in the beginning and 120.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 364.28 ms. Allocated memory is still 157.3 MB. Free memory was 120.7 MB in the beginning and 109.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6467.87 ms. Allocated memory was 157.3 MB in the beginning and 195.0 MB in the end (delta: 37.7 MB). Free memory was 109.2 MB in the beginning and 176.3 MB in the end (delta: -67.1 MB). Peak memory consumption was 81.5 MB. Max. memory is 8.0 GB. * Witness Printer took 60.58 ms. Allocated memory is still 195.0 MB. Free memory was 176.3 MB in the beginning and 173.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i