/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.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:32:53,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:32:53,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:32:54,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:32:54,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:32:54,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:32:54,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:32:54,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:32:54,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:32:54,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:32:54,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:32:54,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:32:54,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:32:54,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:32:54,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:32:54,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:32:54,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:32:54,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:32:54,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:32:54,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:32:54,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:32:54,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:32:54,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:32:54,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:32:54,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:32:54,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:32:54,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:32:54,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:32:54,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:32:54,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:32:54,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:32:54,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:32:54,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:32:54,101 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:32:54,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:32:54,101 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:32:54,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:32:54,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:32:54,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:32:54,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:32:54,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:32:54,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:32:54,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:32:54,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:32:54,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:32:54,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:32:54,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:32:54,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:32:54,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:32:54,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:32:54,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:32:54,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:32:54,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:32:54,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:32:54,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:32:54,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:32:54,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:32:54,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:32:54,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:32:54,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:32:54,415 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:32:54,420 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:32:54,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:32:54,421 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:32:54,422 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-07 11:32:54,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c477cb30/aa0c62cd0e714a6c9552d313746e41e9/FLAG4d421d891 [2020-07-07 11:32:54,965 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:32:54,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-07 11:32:54,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c477cb30/aa0c62cd0e714a6c9552d313746e41e9/FLAG4d421d891 [2020-07-07 11:32:55,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c477cb30/aa0c62cd0e714a6c9552d313746e41e9 [2020-07-07 11:32:55,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:32:55,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:32:55,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:55,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:32:55,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:32:55,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461264cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55, skipping insertion in model container [2020-07-07 11:32:55,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:32:55,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:32:55,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:55,546 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:32:55,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:55,577 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:32:55,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55 WrapperNode [2020-07-07 11:32:55,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:55,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:32:55,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:32:55,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:32:55,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (1/1) ... [2020-07-07 11:32:55,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:32:55,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:32:55,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:32:55,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:32:55,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (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 [2020-07-07 11:32:55,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:32:55,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:32:55,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:32:55,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:32:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:32:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:32:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 11:32:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:32:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:32:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:32:55,962 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:32:55,963 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:32:55,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:55 BoogieIcfgContainer [2020-07-07 11:32:55,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:32:55,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:32:55,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:32:55,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:32:55,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:32:55" (1/3) ... [2020-07-07 11:32:55,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db80793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:55, skipping insertion in model container [2020-07-07 11:32:55,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:55" (2/3) ... [2020-07-07 11:32:55,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db80793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:55, skipping insertion in model container [2020-07-07 11:32:55,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:55" (3/3) ... [2020-07-07 11:32:56,004 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-07-07 11:32:56,037 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:32:56,050 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:32:56,074 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:32:56,103 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:32:56,103 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:32:56,104 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:32:56,104 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:32:56,104 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:32:56,104 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:32:56,104 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:32:56,104 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:32:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:32:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:32:56,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:56,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:56,133 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:56,139 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-07-07 11:32:56,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:56,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679828023] [2020-07-07 11:32:56,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:56,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679828023] [2020-07-07 11:32:56,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:56,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 11:32:56,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614571243] [2020-07-07 11:32:56,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 11:32:56,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 11:32:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:32:56,294 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-07 11:32:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:56,314 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-07 11:32:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 11:32:56,315 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-07 11:32:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:56,324 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:32:56,324 INFO L226 Difference]: Without dead ends: 14 [2020-07-07 11:32:56,327 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 [2020-07-07 11:32:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-07 11:32:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-07 11:32:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-07 11:32:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-07 11:32:56,370 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-07-07 11:32:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:56,371 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-07 11:32:56,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 11:32:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-07 11:32:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:32:56,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:56,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:56,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:32:56,373 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-07-07 11:32:56,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:56,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014744494] [2020-07-07 11:32:56,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:56,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014744494] [2020-07-07 11:32:56,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:56,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:32:56,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93691789] [2020-07-07 11:32:56,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:32:56,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:32:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:32:56,478 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-07-07 11:32:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:56,552 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-07 11:32:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:32:56,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-07 11:32:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:56,554 INFO L225 Difference]: With dead ends: 23 [2020-07-07 11:32:56,555 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:32:56,556 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 [2020-07-07 11:32:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:32:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:32:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:32:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-07 11:32:56,569 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-07-07 11:32:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:56,569 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-07 11:32:56,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:32:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-07 11:32:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 11:32:56,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:56,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:56,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:32:56,573 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:56,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:56,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-07-07 11:32:56,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:56,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981772907] [2020-07-07 11:32:56,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:56,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981772907] [2020-07-07 11:32:56,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857019913] [2020-07-07 11:32:56,845 INFO L94 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 [2020-07-07 11:32:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:32:56,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:57,042 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:57,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:57,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-07 11:32:57,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752159408] [2020-07-07 11:32:57,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:32:57,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:57,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:32:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:32:57,096 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2020-07-07 11:32:57,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:57,339 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-07 11:32:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:32:57,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-07-07 11:32:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:57,343 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:32:57,344 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 11:32:57,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:32:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 11:32:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-07-07 11:32:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:32:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-07 11:32:57,353 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-07 11:32:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:57,354 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-07 11:32:57,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:32:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-07 11:32:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 11:32:57,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:57,355 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:57,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:32:57,569 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-07-07 11:32:57,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:57,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941870141] [2020-07-07 11:32:57,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-07 11:32:57,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941870141] [2020-07-07 11:32:57,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:57,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:32:57,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783042734] [2020-07-07 11:32:57,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:32:57,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:57,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:32:57,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:32:57,617 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-07-07 11:32:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:57,637 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-07 11:32:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:32:57,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-07 11:32:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:57,639 INFO L225 Difference]: With dead ends: 36 [2020-07-07 11:32:57,639 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:32:57,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:32:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:32:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 11:32:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:32:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-07 11:32:57,646 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-07-07 11:32:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:57,646 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-07 11:32:57,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:32:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-07 11:32:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 11:32:57,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:57,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:57,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:32:57,648 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-07-07 11:32:57,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:57,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783712940] [2020-07-07 11:32:57,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:57,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783712940] [2020-07-07 11:32:57,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515639301] [2020-07-07 11:32:57,702 INFO L92 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 [2020-07-07 11:32:57,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:57,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:57,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:32:57,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:57,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:57,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-07 11:32:57,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778721910] [2020-07-07 11:32:57,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:32:57,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:57,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:32:57,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:32:57,774 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-07-07 11:32:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:57,818 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-07 11:32:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:32:57,819 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-07 11:32:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:57,820 INFO L225 Difference]: With dead ends: 32 [2020-07-07 11:32:57,820 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:32:57,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:32:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:32:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 11:32:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:32:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-07 11:32:57,826 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2020-07-07 11:32:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:57,827 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-07 11:32:57,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:32:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-07 11:32:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:32:57,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:57,828 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:58,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:58,043 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:58,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-07-07 11:32:58,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:58,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850586960] [2020-07-07 11:32:58,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:58,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850586960] [2020-07-07 11:32:58,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006698052] [2020-07-07 11:32:58,114 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 11:32:58,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:32:58,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:58,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:32:58,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:58,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:58,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-07 11:32:58,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144653110] [2020-07-07 11:32:58,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:32:58,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:58,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:32:58,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:32:58,208 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2020-07-07 11:32:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:58,261 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-07-07 11:32:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:32:58,262 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-07-07 11:32:58,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:58,263 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:32:58,263 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 11:32:58,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:32:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 11:32:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-07-07 11:32:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:32:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 11:32:58,269 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2020-07-07 11:32:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:58,270 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 11:32:58,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:32:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 11:32:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:32:58,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:58,272 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:58,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:58,473 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2020-07-07 11:32:58,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:58,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231578628] [2020-07-07 11:32:58,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:32:58,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231578628] [2020-07-07 11:32:58,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165408766] [2020-07-07 11:32:58,703 INFO L92 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) [2020-07-07 11:32:58,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:58,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:58,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:32:58,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:58,986 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:59,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:59,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-07-07 11:32:59,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031279392] [2020-07-07 11:32:59,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 11:32:59,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 11:32:59,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:32:59,035 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 21 states. [2020-07-07 11:32:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:59,554 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-07 11:32:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 11:32:59,555 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2020-07-07 11:32:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:59,555 INFO L225 Difference]: With dead ends: 42 [2020-07-07 11:32:59,556 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:32:59,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 11:32:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:32:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-07-07 11:32:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 11:32:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-07 11:32:59,568 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-07-07 11:32:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:59,568 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-07 11:32:59,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 11:32:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-07 11:32:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:32:59,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:59,571 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:59,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:59,784 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-07-07 11:32:59,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:59,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851984015] [2020-07-07 11:32:59,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:59,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851984015] [2020-07-07 11:32:59,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456310121] [2020-07-07 11:32:59,882 INFO L92 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 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 [2020-07-07 11:32:59,915 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:32:59,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:59,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 11:32:59,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:00,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:33:00,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-07 11:33:00,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423733278] [2020-07-07 11:33:00,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:33:00,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:00,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:33:00,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:33:00,016 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-07-07 11:33:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:00,098 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-07 11:33:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:33:00,099 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-07-07 11:33:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:00,100 INFO L225 Difference]: With dead ends: 42 [2020-07-07 11:33:00,100 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:33:00,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:33:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:33:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-07 11:33:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:33:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-07 11:33:00,106 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-07-07 11:33:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:00,106 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-07 11:33:00,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:33:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-07 11:33:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:33:00,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:00,108 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:00,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:00,323 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:00,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-07-07 11:33:00,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:00,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101886492] [2020-07-07 11:33:00,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:00,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101886492] [2020-07-07 11:33:00,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889194276] [2020-07-07 11:33:00,467 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-07-07 11:33:00,505 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:33:00,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:33:00,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 11:33:00,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:00,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:33:00,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-07 11:33:00,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876118147] [2020-07-07 11:33:00,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:33:00,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:00,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:33:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:33:00,637 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 20 states. [2020-07-07 11:33:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:00,742 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-07-07 11:33:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:33:00,744 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2020-07-07 11:33:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:00,745 INFO L225 Difference]: With dead ends: 47 [2020-07-07 11:33:00,745 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 11:33:00,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:33:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 11:33:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-07 11:33:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:33:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-07 11:33:00,752 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-07-07 11:33:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:00,752 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-07 11:33:00,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:33:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-07 11:33:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:33:00,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:00,754 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:00,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:00,956 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-07-07 11:33:00,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:00,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451889514] [2020-07-07 11:33:00,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:33:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:33:01,044 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:33:01,047 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:33:01,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:33:01,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:33:01 BoogieIcfgContainer [2020-07-07 11:33:01,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:33:01,096 INFO L168 Benchmark]: Toolchain (without parser) took 5762.63 ms. Allocated memory was 144.7 MB in the beginning and 246.9 MB in the end (delta: 102.2 MB). Free memory was 103.0 MB in the beginning and 169.2 MB in the end (delta: -66.2 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:01,101 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-07 11:33:01,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.56 ms. Allocated memory is still 144.7 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:01,103 INFO L168 Benchmark]: Boogie Preprocessor took 114.27 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 93.0 MB in the beginning and 183.0 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:01,104 INFO L168 Benchmark]: RCFGBuilder took 274.52 ms. Allocated memory is still 202.9 MB. Free memory was 183.0 MB in the beginning and 169.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:01,111 INFO L168 Benchmark]: TraceAbstraction took 5116.39 ms. Allocated memory was 202.9 MB in the beginning and 246.9 MB in the end (delta: 44.0 MB). Free memory was 169.4 MB in the beginning and 169.2 MB in the end (delta: 172.5 kB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:01,120 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.56 ms. Allocated memory is still 144.7 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.27 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 93.0 MB in the beginning and 183.0 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 274.52 ms. Allocated memory is still 202.9 MB. Free memory was 183.0 MB in the beginning and 169.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5116.39 ms. Allocated memory was 202.9 MB in the beginning and 246.9 MB in the end (delta: 44.0 MB). Free memory was 169.4 MB in the beginning and 169.2 MB in the end (delta: 172.5 kB). Peak memory consumption was 44.2 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, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i