/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/recursive/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:56:22,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:56:22,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:56:22,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:56:22,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:56:22,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:56:22,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:56:22,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:56:23,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:56:23,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:56:23,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:56:23,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 10:56:23,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 10:56:23,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 10:56:23,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 10:56:23,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 10:56:23,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 10:56:23,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 10:56:23,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 10:56:23,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 10:56:23,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 10:56:23,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 10:56:23,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 10:56:23,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 10:56:23,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 10:56:23,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 10:56:23,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 10:56:23,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 10:56:23,045 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 10:56:23,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:56:23,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:56:23,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:56:23,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:56:23,083 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:56:23,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:56:23,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:56:23,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:56:23,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:56:23,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:56:23,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:56:23,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:56:23,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:56:23,087 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:56:23,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:56:23,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:56:23,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:56:23,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:56:23,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:56:23,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:56:23,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:56:23,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:56:23,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:56:23,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:56:23,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:56:23,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:56:23,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:56:23,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:56:23,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:56:23,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:56:23,375 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:56:23,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:56:23,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:56:23,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:56:23,394 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:56:23,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-07 10:56:23,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc82e7d5e/ebf299d2d89e4926bb327b14246ee2e4/FLAG33b4699a8 [2020-07-07 10:56:23,872 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:56:23,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-07 10:56:23,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc82e7d5e/ebf299d2d89e4926bb327b14246ee2e4/FLAG33b4699a8 [2020-07-07 10:56:24,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc82e7d5e/ebf299d2d89e4926bb327b14246ee2e4 [2020-07-07 10:56:24,316 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:56:24,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:56:24,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:24,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:56:24,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:56:24,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28772d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24, skipping insertion in model container [2020-07-07 10:56:24,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:56:24,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:56:24,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:24,586 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:56:24,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:24,624 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:56:24,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24 WrapperNode [2020-07-07 10:56:24,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:24,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:56:24,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:56:24,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:56:24,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:56:24,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:56:24,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:56:24,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:56:24,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (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 10:56:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:56:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:56:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-07 10:56:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:56:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:56:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 10:56:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-07 10:56:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:56:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:56:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:56:25,004 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:56:25,005 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 10:56:25,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:25 BoogieIcfgContainer [2020-07-07 10:56:25,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:56:25,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:56:25,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:56:25,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:56:25,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:56:24" (1/3) ... [2020-07-07 10:56:25,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33abbbd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:25, skipping insertion in model container [2020-07-07 10:56:25,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24" (2/3) ... [2020-07-07 10:56:25,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33abbbd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:25, skipping insertion in model container [2020-07-07 10:56:25,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:25" (3/3) ... [2020-07-07 10:56:25,016 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-07 10:56:25,025 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:56:25,031 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:56:25,044 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:56:25,066 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:56:25,066 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:56:25,067 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:56:25,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:56:25,067 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:56:25,067 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:56:25,067 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:56:25,067 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:56:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-07 10:56:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 10:56:25,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:25,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:25,094 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:25,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:25,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-07 10:56:25,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:25,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683039902] [2020-07-07 10:56:25,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,334 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 10:56:25,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683039902] [2020-07-07 10:56:25,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:25,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 10:56:25,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140579793] [2020-07-07 10:56:25,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 10:56:25,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 10:56:25,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:56:25,370 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-07 10:56:25,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:25,528 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-07-07 10:56:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:56:25,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-07 10:56:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:25,539 INFO L225 Difference]: With dead ends: 55 [2020-07-07 10:56:25,540 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 10:56:25,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 10:56:25,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-07 10:56:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 10:56:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-07 10:56:25,589 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-07-07 10:56:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:25,590 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-07 10:56:25,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 10:56:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-07 10:56:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 10:56:25,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:25,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:25,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 10:56:25,594 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:25,595 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-07 10:56:25,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:25,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368414842] [2020-07-07 10:56:25,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:56:25,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368414842] [2020-07-07 10:56:25,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270755613] [2020-07-07 10:56:25,746 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 10:56:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 10:56:25,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:56:25,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:25,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-07 10:56:25,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416192240] [2020-07-07 10:56:25,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:56:25,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:25,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:56:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:25,883 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 7 states. [2020-07-07 10:56:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:25,978 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2020-07-07 10:56:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:56:25,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-07 10:56:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:25,983 INFO L225 Difference]: With dead ends: 52 [2020-07-07 10:56:25,984 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 10:56:25,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 10:56:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 10:56:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 10:56:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-07-07 10:56:25,996 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2020-07-07 10:56:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:25,997 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-07-07 10:56:25,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:56:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-07-07 10:56:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 10:56:25,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:26,000 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:26,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 10:56:26,214 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:26,215 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-07 10:56:26,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:26,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399006721] [2020-07-07 10:56:26,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 10:56:26,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399006721] [2020-07-07 10:56:26,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851511405] [2020-07-07 10:56:26,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:56:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 10:56:26,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 10:56:26,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:26,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-07 10:56:26,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903959055] [2020-07-07 10:56:26,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 10:56:26,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:26,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 10:56:26,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:26,540 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 8 states. [2020-07-07 10:56:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:26,724 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2020-07-07 10:56:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 10:56:26,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-07-07 10:56:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:26,728 INFO L225 Difference]: With dead ends: 77 [2020-07-07 10:56:26,728 INFO L226 Difference]: Without dead ends: 53 [2020-07-07 10:56:26,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:56:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-07 10:56:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-07 10:56:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 10:56:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2020-07-07 10:56:26,744 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 35 [2020-07-07 10:56:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:26,745 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2020-07-07 10:56:26,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 10:56:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2020-07-07 10:56:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-07 10:56:26,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:26,748 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:26,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:26,962 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:26,962 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 2 times [2020-07-07 10:56:26,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:26,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380280195] [2020-07-07 10:56:26,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-07 10:56:27,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380280195] [2020-07-07 10:56:27,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098846970] [2020-07-07 10:56:27,219 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 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 10:56:27,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:27,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:27,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 10:56:27,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-07 10:56:27,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:27,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-07 10:56:27,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696274151] [2020-07-07 10:56:27,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 10:56:27,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:27,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 10:56:27,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:27,317 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand 9 states. [2020-07-07 10:56:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:27,442 INFO L93 Difference]: Finished difference Result 123 states and 230 transitions. [2020-07-07 10:56:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 10:56:27,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-07-07 10:56:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:27,445 INFO L225 Difference]: With dead ends: 123 [2020-07-07 10:56:27,445 INFO L226 Difference]: Without dead ends: 56 [2020-07-07 10:56:27,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:56:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-07 10:56:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-07 10:56:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-07 10:56:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-07-07 10:56:27,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 48 [2020-07-07 10:56:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:27,461 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-07-07 10:56:27,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 10:56:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-07-07 10:56:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-07 10:56:27,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:27,466 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:27,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:27,682 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 3 times [2020-07-07 10:56:27,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:27,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875181476] [2020-07-07 10:56:27,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 150 proven. 216 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-07-07 10:56:28,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875181476] [2020-07-07 10:56:28,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188840174] [2020-07-07 10:56:28,067 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 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 [2020-07-07 10:56:28,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-07-07 10:56:28,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:28,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 10:56:28,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 196 proven. 31 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 10:56:28,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:28,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-07-07 10:56:28,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795739660] [2020-07-07 10:56:28,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:28,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:28,199 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 14 states. [2020-07-07 10:56:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:28,640 INFO L93 Difference]: Finished difference Result 141 states and 275 transitions. [2020-07-07 10:56:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 10:56:28,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 122 [2020-07-07 10:56:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:28,643 INFO L225 Difference]: With dead ends: 141 [2020-07-07 10:56:28,644 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 10:56:28,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-07-07 10:56:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 10:56:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-07 10:56:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 10:56:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-07-07 10:56:28,665 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 122 [2020-07-07 10:56:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:28,666 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-07-07 10:56:28,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-07-07 10:56:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-07 10:56:28,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:28,673 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:28,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:28,874 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 4 times [2020-07-07 10:56:28,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:28,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361865068] [2020-07-07 10:56:28,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-07 10:56:29,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361865068] [2020-07-07 10:56:29,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651029635] [2020-07-07 10:56:29,155 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 10:56:29,207 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:56:29,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:29,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 10:56:29,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-07 10:56:29,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:29,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2020-07-07 10:56:29,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855524310] [2020-07-07 10:56:29,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 10:56:29,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 10:56:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-07 10:56:29,260 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 17 states. [2020-07-07 10:56:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:29,679 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2020-07-07 10:56:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:56:29,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-07-07 10:56:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:29,682 INFO L225 Difference]: With dead ends: 111 [2020-07-07 10:56:29,682 INFO L226 Difference]: Without dead ends: 73 [2020-07-07 10:56:29,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 10:56:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-07 10:56:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-07 10:56:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 10:56:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-07-07 10:56:29,696 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 82 [2020-07-07 10:56:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:29,696 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-07-07 10:56:29,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 10:56:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-07-07 10:56:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 10:56:29,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:29,698 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:29,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 10:56:29,906 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1060139340, now seen corresponding path program 5 times [2020-07-07 10:56:29,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:29,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833388506] [2020-07-07 10:56:29,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 250 proven. 107 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2020-07-07 10:56:30,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833388506] [2020-07-07 10:56:30,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408930368] [2020-07-07 10:56:30,278 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 10:56:30,334 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-07-07 10:56:30,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:30,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 10:56:30,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 385 proven. 71 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2020-07-07 10:56:30,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:30,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2020-07-07 10:56:30,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256742640] [2020-07-07 10:56:30,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 10:56:30,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 10:56:30,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:30,431 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 18 states. [2020-07-07 10:56:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:31,156 INFO L93 Difference]: Finished difference Result 124 states and 156 transitions. [2020-07-07 10:56:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-07 10:56:31,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-07 10:56:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:31,158 INFO L225 Difference]: With dead ends: 124 [2020-07-07 10:56:31,159 INFO L226 Difference]: Without dead ends: 80 [2020-07-07 10:56:31,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 10:56:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-07 10:56:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-07 10:56:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 10:56:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-07-07 10:56:31,170 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 121 [2020-07-07 10:56:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:31,171 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-07-07 10:56:31,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 10:56:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-07-07 10:56:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-07 10:56:31,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:31,173 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:31,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:31,386 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:31,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 6 times [2020-07-07 10:56:31,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:31,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536025908] [2020-07-07 10:56:31,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-07 10:56:32,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536025908] [2020-07-07 10:56:32,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543482601] [2020-07-07 10:56:32,078 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 10:56:32,171 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-07-07 10:56:32,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:32,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-07 10:56:32,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-07 10:56:32,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:32,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-07-07 10:56:32,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465209067] [2020-07-07 10:56:32,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 10:56:32,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 10:56:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-07-07 10:56:32,282 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 24 states. [2020-07-07 10:56:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:33,163 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-07-07 10:56:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-07 10:56:33,164 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 160 [2020-07-07 10:56:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:33,166 INFO L225 Difference]: With dead ends: 137 [2020-07-07 10:56:33,166 INFO L226 Difference]: Without dead ends: 93 [2020-07-07 10:56:33,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 10:56:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-07 10:56:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-07-07 10:56:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-07 10:56:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2020-07-07 10:56:33,179 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 160 [2020-07-07 10:56:33,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:33,180 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2020-07-07 10:56:33,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 10:56:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2020-07-07 10:56:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-07 10:56:33,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:33,182 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:33,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:33,398 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-07 10:56:33,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:33,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034046011] [2020-07-07 10:56:33,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-07-07 10:56:34,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034046011] [2020-07-07 10:56:34,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657194681] [2020-07-07 10:56:34,408 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-07 10:56:34,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-07 10:56:34,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:34,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 25 [2020-07-07 10:56:34,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544562840] [2020-07-07 10:56:34,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 10:56:34,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:34,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 10:56:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-07-07 10:56:34,735 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand 25 states. [2020-07-07 10:56:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:36,426 INFO L93 Difference]: Finished difference Result 134 states and 177 transitions. [2020-07-07 10:56:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-07 10:56:36,426 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2020-07-07 10:56:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:36,429 INFO L225 Difference]: With dead ends: 134 [2020-07-07 10:56:36,429 INFO L226 Difference]: Without dead ends: 127 [2020-07-07 10:56:36,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 10:56:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-07 10:56:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2020-07-07 10:56:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-07 10:56:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2020-07-07 10:56:36,445 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 186 [2020-07-07 10:56:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:36,446 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2020-07-07 10:56:36,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 10:56:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2020-07-07 10:56:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-07 10:56:36,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:36,449 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:36,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 10:56:36,665 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2020-07-07 10:56:36,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:36,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824318404] [2020-07-07 10:56:36,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-07-07 10:56:37,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824318404] [2020-07-07 10:56:37,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898982586] [2020-07-07 10:56:37,307 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:37,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:37,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:37,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-07 10:56:37,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-07 10:56:37,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:37,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-07-07 10:56:37,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054560594] [2020-07-07 10:56:37,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 10:56:37,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 10:56:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-07 10:56:37,531 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand 25 states. [2020-07-07 10:56:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:38,604 INFO L93 Difference]: Finished difference Result 206 states and 280 transitions. [2020-07-07 10:56:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-07 10:56:38,605 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-07-07 10:56:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:38,607 INFO L225 Difference]: With dead ends: 206 [2020-07-07 10:56:38,607 INFO L226 Difference]: Without dead ends: 135 [2020-07-07 10:56:38,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 10:56:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-07 10:56:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2020-07-07 10:56:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 10:56:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2020-07-07 10:56:38,643 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 173 [2020-07-07 10:56:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:38,644 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2020-07-07 10:56:38,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 10:56:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2020-07-07 10:56:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-07 10:56:38,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:38,649 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:38,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:38,864 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:38,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 9 times [2020-07-07 10:56:38,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:38,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252468769] [2020-07-07 10:56:38,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 665 proven. 517 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2020-07-07 10:56:39,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252468769] [2020-07-07 10:56:39,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214277299] [2020-07-07 10:56:39,610 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:39,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-07-07 10:56:39,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:39,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-07 10:56:39,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-07 10:56:39,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:39,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 27 [2020-07-07 10:56:39,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666455930] [2020-07-07 10:56:39,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 10:56:39,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 10:56:39,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2020-07-07 10:56:39,854 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand 27 states. [2020-07-07 10:56:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:40,650 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2020-07-07 10:56:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 10:56:40,651 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 199 [2020-07-07 10:56:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:40,653 INFO L225 Difference]: With dead ends: 210 [2020-07-07 10:56:40,653 INFO L226 Difference]: Without dead ends: 137 [2020-07-07 10:56:40,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 10:56:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-07 10:56:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-07-07 10:56:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-07 10:56:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2020-07-07 10:56:40,668 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 199 [2020-07-07 10:56:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:40,668 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2020-07-07 10:56:40,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 10:56:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2020-07-07 10:56:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-07 10:56:40,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:40,671 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:40,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:40,888 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 10 times [2020-07-07 10:56:40,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:40,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64056096] [2020-07-07 10:56:40,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 268 proven. 783 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2020-07-07 10:56:41,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64056096] [2020-07-07 10:56:41,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170961732] [2020-07-07 10:56:41,399 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:41,492 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:56:41,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:41,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-07 10:56:41,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-07-07 10:56:41,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:41,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2020-07-07 10:56:41,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144348570] [2020-07-07 10:56:41,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 10:56:41,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:41,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 10:56:41,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-07-07 10:56:41,565 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 20 states. [2020-07-07 10:56:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:42,047 INFO L93 Difference]: Finished difference Result 178 states and 230 transitions. [2020-07-07 10:56:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:56:42,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 212 [2020-07-07 10:56:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:42,050 INFO L225 Difference]: With dead ends: 178 [2020-07-07 10:56:42,050 INFO L226 Difference]: Without dead ends: 107 [2020-07-07 10:56:42,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 10:56:42,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-07 10:56:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2020-07-07 10:56:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 10:56:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2020-07-07 10:56:42,074 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 212 [2020-07-07 10:56:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:42,075 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2020-07-07 10:56:42,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 10:56:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2020-07-07 10:56:42,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-07 10:56:42,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:42,080 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:42,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 10:56:42,296 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:42,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 11 times [2020-07-07 10:56:42,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:42,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853360432] [2020-07-07 10:56:42,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 228 proven. 513 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-07 10:56:42,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853360432] [2020-07-07 10:56:42,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752697941] [2020-07-07 10:56:42,913 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:43,037 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-07-07 10:56:43,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:43,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-07 10:56:43,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 1483 proven. 777 refuted. 0 times theorem prover too weak. 2069 trivial. 0 not checked. [2020-07-07 10:56:43,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:43,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 29] total 35 [2020-07-07 10:56:43,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892263277] [2020-07-07 10:56:43,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-07 10:56:43,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:43,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-07 10:56:43,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 10:56:43,621 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand 35 states. [2020-07-07 10:56:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:45,300 INFO L93 Difference]: Finished difference Result 199 states and 277 transitions. [2020-07-07 10:56:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-07 10:56:45,301 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 284 [2020-07-07 10:56:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:45,302 INFO L225 Difference]: With dead ends: 199 [2020-07-07 10:56:45,302 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 10:56:45,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1024, Invalid=5456, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 10:56:45,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 10:56:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 10:56:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 10:56:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 10:56:45,307 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-07 10:56:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:45,308 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 10:56:45,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-07 10:56:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 10:56:45,308 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 10:56:45,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 10:56:45,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 10:56:46,822 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 16 [2020-07-07 10:56:48,261 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 166 DAG size of output: 70 [2020-07-07 10:56:48,400 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 10 [2020-07-07 10:56:48,453 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 10:56:48,453 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:56:48,453 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:56:48,453 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 10:56:48,453 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 10:56:48,453 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 10:56:48,454 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-07 10:56:48,454 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-07 10:56:48,454 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (or (<= 1 ackermann_~m) (not (<= |ackermann_#in~n| 1)) (not (<= 0 |ackermann_#in~m|))) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-07-07 10:56:48,454 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-07 10:56:48,454 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (= 0 |ackermann_#in~n|)) [2020-07-07 10:56:48,455 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse12 (<= |ackermann_#t~ret1| 5)) (.cse8 (<= 5 |ackermann_#t~ret1|)) (.cse1 (<= 2 |ackermann_#in~n|)) (.cse10 (<= |ackermann_#in~n| 2)) (.cse6 (<= 3 |ackermann_#in~n|)) (.cse14 (<= ackermann_~m 1))) (let ((.cse2 (not (<= |ackermann_#in~m| 1))) (.cse3 (not (<= 1 |ackermann_#in~m|))) (.cse4 (and (<= |ackermann_#in~n| 5) (<= 5 |ackermann_#in~n|) (<= 1 ackermann_~m) .cse14 (<= |ackermann_#t~ret1| 6) (<= 6 |ackermann_#t~ret1|))) (.cse7 (= 0 |ackermann_#in~m|)) (.cse11 (<= |ackermann_#in~n| 1)) (.cse13 (<= 3 |ackermann_#in~m|)) (.cse5 (and .cse6 (<= 7 |ackermann_#t~ret1|))) (.cse15 (and (<= 2 |ackermann_#in~m|) .cse12 .cse8 .cse1 .cse10)) (.cse9 (<= 3 |ackermann_#t~ret1|)) (.cse0 (<= |ackermann_#t~ret1| 3))) (and (= ackermann_~m |ackermann_#in~m|) (or (and .cse0 .cse1) .cse2 .cse3 .cse4 .cse5 (and (<= |ackermann_#in~n| 4) .cse6) (and (<= |ackermann_#t~ret1| 2) (<= 2 |ackermann_#t~ret1|))) (= ackermann_~n |ackermann_#in~n|) (or .cse7 (not (<= |ackermann_#in~m| 0))) (or (and (<= 6 |ackermann_#in~n|) .cse8) (and .cse9 .cse10) .cse11 .cse2 .cse3 .cse4 (and (<= 4 |ackermann_#in~n|) .cse12 .cse8) (and (<= |ackermann_#t~ret1| 4) (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret1|))) (or (not (<= |ackermann_#in~n| 0)) .cse7) (or .cse11 .cse13 .cse5 .cse14 .cse15) (or .cse13 .cse5 .cse14 .cse15 (and .cse9 .cse0))))) [2020-07-07 10:56:48,455 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-07 10:56:48,455 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-07 10:56:48,455 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-07 10:56:48,455 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-07 10:56:48,456 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-07 10:56:48,456 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-07 10:56:48,456 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-07 10:56:48,456 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-07 10:56:48,457 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-07 10:56:48,457 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-07 10:56:48,457 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-07 10:56:48,457 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-07 10:56:48,457 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-07 10:56:48,457 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-07 10:56:48,457 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-07 10:56:48,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 10:56:48 BoogieIcfgContainer [2020-07-07 10:56:48,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 10:56:48,463 INFO L168 Benchmark]: Toolchain (without parser) took 24146.23 ms. Allocated memory was 144.7 MB in the beginning and 520.1 MB in the end (delta: 375.4 MB). Free memory was 104.7 MB in the beginning and 306.8 MB in the end (delta: -202.2 MB). Peak memory consumption was 391.3 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:48,464 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 144.7 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 10:56:48,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.07 ms. Allocated memory is still 144.7 MB. Free memory was 104.5 MB in the beginning and 94.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:48,466 INFO L168 Benchmark]: Boogie Preprocessor took 40.55 ms. Allocated memory is still 144.7 MB. Free memory was 94.9 MB in the beginning and 93.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:48,466 INFO L168 Benchmark]: RCFGBuilder took 342.32 ms. Allocated memory was 144.7 MB in the beginning and 204.5 MB in the end (delta: 59.8 MB). Free memory was 93.5 MB in the beginning and 171.0 MB in the end (delta: -77.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:48,467 INFO L168 Benchmark]: TraceAbstraction took 23452.08 ms. Allocated memory was 204.5 MB in the beginning and 520.1 MB in the end (delta: 315.6 MB). Free memory was 170.4 MB in the beginning and 306.8 MB in the end (delta: -136.5 MB). Peak memory consumption was 397.2 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:48,470 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 144.7 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.07 ms. Allocated memory is still 144.7 MB. Free memory was 104.5 MB in the beginning and 94.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.55 ms. Allocated memory is still 144.7 MB. Free memory was 94.9 MB in the beginning and 93.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 342.32 ms. Allocated memory was 144.7 MB in the beginning and 204.5 MB in the end (delta: 59.8 MB). Free memory was 93.5 MB in the beginning and 171.0 MB in the end (delta: -77.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23452.08 ms. Allocated memory was 204.5 MB in the beginning and 520.1 MB in the end (delta: 315.6 MB). Free memory was 170.4 MB in the beginning and 306.8 MB in the end (delta: -136.5 MB). Peak memory consumption was 397.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.4s, OverallIterations: 13, TraceHistogramMax: 42, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 409 SDtfs, 489 SDslu, 2433 SDs, 0 SdLazy, 5943 SolverSat, 1046 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2580 GetRequests, 2124 SyntacticMatches, 6 SemanticMatches, 450 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 148 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 533 PreInvPairs, 969 NumberOfFragments, 249 HoareAnnotationTreeSize, 533 FomulaSimplifications, 147434 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 8626 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 3303 NumberOfCodeBlocks, 3153 NumberOfCodeBlocksAsserted, 96 NumberOfCheckSat, 3278 ConstructedInterpolants, 0 QuantifiedInterpolants, 1088152 SizeOfPredicates, 106 NumberOfNonLiveVariables, 4411 ConjunctsInSsa, 336 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 24169/29660 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...