/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-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:59:54,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:59:54,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:59:54,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:59:54,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:59:54,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:59:54,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:59:54,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:59:54,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:59:54,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:59:54,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:59:54,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:59:54,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:59:54,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:59:55,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:59:55,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:59:55,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:59:55,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:59:55,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:59:55,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:59:55,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:59:55,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:59:55,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:59:55,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:59:55,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:59:55,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:59:55,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:59:55,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:59:55,022 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 [2020-07-17 11:59:55,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:59:55,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:59:55,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:59:55,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:59:55,037 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:59:55,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:59:55,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:59:55,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:59:55,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:59:55,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:59:55,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:59:55,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:59:55,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:59:55,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:59:55,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:59:55,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:59:55,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:59:55,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:59:55,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:59:55,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:59:55,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:59:55,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:59:55,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:59:55,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:59:55,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:59:55,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:59:55,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:59:55,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:59:55,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:59:55,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:59:55,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:59:55,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:59:55,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:59:55,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:59:55,363 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:59:55,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-07-17 11:59:55,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/662972b8a/60f02fa4ee8f4cc1a633059f185b0717/FLAGeb90e94aa [2020-07-17 11:59:55,908 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:59:55,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-07-17 11:59:55,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/662972b8a/60f02fa4ee8f4cc1a633059f185b0717/FLAGeb90e94aa [2020-07-17 11:59:56,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/662972b8a/60f02fa4ee8f4cc1a633059f185b0717 [2020-07-17 11:59:56,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:59:56,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:59:56,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:56,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:59:56,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:59:56,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5490e82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56, skipping insertion in model container [2020-07-17 11:59:56,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:59:56,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:59:56,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:56,525 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:59:56,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:56,552 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:59:56,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56 WrapperNode [2020-07-17 11:59:56,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:56,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:59:56,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:59:56,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:59:56,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (1/1) ... [2020-07-17 11:59:56,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:59:56,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:59:56,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:59:56,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:59:56,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (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 [2020-07-17 11:59:56,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:59:56,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:59:56,726 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-17 11:59:56,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:59:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:59:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:59:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-17 11:59:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:59:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:59:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:59:56,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:59:56,892 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:59:56,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:56 BoogieIcfgContainer [2020-07-17 11:59:56,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:59:56,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:59:56,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:59:56,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:59:56,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:59:56" (1/3) ... [2020-07-17 11:59:56,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d68088e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:56, skipping insertion in model container [2020-07-17 11:59:56,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:56" (2/3) ... [2020-07-17 11:59:56,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d68088e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:56, skipping insertion in model container [2020-07-17 11:59:56,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:56" (3/3) ... [2020-07-17 11:59:56,905 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-07-17 11:59:56,916 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:59:56,924 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:59:56,938 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:59:56,963 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:59:56,963 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:59:56,964 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:59:56,964 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:59:56,964 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:59:56,964 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:59:56,964 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:59:56,965 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:59:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-17 11:59:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 11:59:56,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:56,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:56,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:56,994 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-17 11:59:57,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:57,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227841862] [2020-07-17 11:59:57,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:59:57,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227841862] [2020-07-17 11:59:57,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:59:57,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:59:57,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985674578] [2020-07-17 11:59:57,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:59:57,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:59:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:57,344 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-17 11:59:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:57,534 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-17 11:59:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:59:57,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-17 11:59:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:57,553 INFO L225 Difference]: With dead ends: 30 [2020-07-17 11:59:57,553 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 11:59:57,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:59:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 11:59:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-17 11:59:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 11:59:57,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-17 11:59:57,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-17 11:59:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:57,619 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-17 11:59:57,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:59:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-17 11:59:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 11:59:57,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:57,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:57,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:59:57,631 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-17 11:59:57,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:57,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581529146] [2020-07-17 11:59:57,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:57,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581529146] [2020-07-17 11:59:57,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64594151] [2020-07-17 11:59:57,811 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 [2020-07-17 11:59:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:57,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:59:57,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:57,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:57,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-17 11:59:57,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719509989] [2020-07-17 11:59:57,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 11:59:57,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:57,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 11:59:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 11:59:57,935 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-17 11:59:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:58,009 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-17 11:59:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 11:59:58,010 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-17 11:59:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:58,011 INFO L225 Difference]: With dead ends: 25 [2020-07-17 11:59:58,011 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 11:59:58,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:59:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 11:59:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 11:59:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 11:59:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-17 11:59:58,020 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-17 11:59:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:58,020 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-17 11:59:58,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 11:59:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-17 11:59:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 11:59:58,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:58,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:58,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 11:59:58,236 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-17 11:59:58,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:58,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772017835] [2020-07-17 11:59:58,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:58,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772017835] [2020-07-17 11:59:58,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917692390] [2020-07-17 11:59:58,394 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:58,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:58,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:58,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:59:58,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:58,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:58,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-17 11:59:58,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790985748] [2020-07-17 11:59:58,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 11:59:58,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 11:59:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:59:58,475 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-17 11:59:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:58,544 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-17 11:59:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 11:59:58,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-17 11:59:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:58,547 INFO L225 Difference]: With dead ends: 28 [2020-07-17 11:59:58,547 INFO L226 Difference]: Without dead ends: 24 [2020-07-17 11:59:58,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:59:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-17 11:59:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-17 11:59:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-17 11:59:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-17 11:59:58,555 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-17 11:59:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:58,555 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-17 11:59:58,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 11:59:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-17 11:59:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 11:59:58,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:58,557 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:58,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:58,772 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:58,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-17 11:59:58,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:58,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871392891] [2020-07-17 11:59:58,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 11:59:58,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871392891] [2020-07-17 11:59:58,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327137624] [2020-07-17 11:59:58,931 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:58,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 11:59:58,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:58,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 11:59:58,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 11:59:59,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:59,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-07-17 11:59:59,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756272621] [2020-07-17 11:59:59,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 11:59:59,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:59,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 11:59:59,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-07-17 11:59:59,098 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 17 states. [2020-07-17 11:59:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:59,275 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-17 11:59:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 11:59:59,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-07-17 11:59:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:59,277 INFO L225 Difference]: With dead ends: 31 [2020-07-17 11:59:59,277 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 11:59:59,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-07-17 11:59:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 11:59:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-17 11:59:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 11:59:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-17 11:59:59,285 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-17 11:59:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:59,286 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-17 11:59:59,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 11:59:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-17 11:59:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 11:59:59,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:59,288 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:59,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:59,501 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-17 11:59:59,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:59,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888639855] [2020-07-17 11:59:59,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 11:59:59,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888639855] [2020-07-17 11:59:59,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145528817] [2020-07-17 11:59:59,696 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 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 [2020-07-17 11:59:59,725 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:59:59,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:59,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-17 11:59:59,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 11:59:59,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:59,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-17 11:59:59,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474307783] [2020-07-17 11:59:59,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 11:59:59,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 11:59:59,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:59:59,767 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-17 11:59:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:59,850 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-17 11:59:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 11:59:59,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-17 11:59:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:59,853 INFO L225 Difference]: With dead ends: 34 [2020-07-17 11:59:59,853 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 11:59:59,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-17 11:59:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 11:59:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 11:59:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 11:59:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-17 11:59:59,861 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-17 11:59:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:59,861 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-17 11:59:59,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 11:59:59,862 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-17 11:59:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-17 11:59:59,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:59,863 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:00,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:00,077 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-17 12:00:00,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:00,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760593811] [2020-07-17 12:00:00,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:00:00,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760593811] [2020-07-17 12:00:00,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609662264] [2020-07-17 12:00:00,255 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 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 [2020-07-17 12:00:00,290 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-17 12:00:00,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:00,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 12:00:00,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:00:00,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:00,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2020-07-17 12:00:00,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369082950] [2020-07-17 12:00:00,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 12:00:00,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:00,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 12:00:00,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-07-17 12:00:00,533 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states. [2020-07-17 12:00:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:00,786 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-17 12:00:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:00:00,787 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-07-17 12:00:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:00,788 INFO L225 Difference]: With dead ends: 37 [2020-07-17 12:00:00,788 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 12:00:00,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 12:00:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 12:00:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-17 12:00:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:00:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-17 12:00:00,802 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-17 12:00:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:00,803 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-17 12:00:00,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 12:00:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-17 12:00:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-17 12:00:00,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:00,809 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:01,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 12:00:01,012 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-17 12:00:01,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:01,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906879269] [2020-07-17 12:00:01,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 12:00:01,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906879269] [2020-07-17 12:00:01,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323489603] [2020-07-17 12:00:01,244 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 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 [2020-07-17 12:00:01,287 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-17 12:00:01,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:01,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-17 12:00:01,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 12:00:01,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:01,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-17 12:00:01,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597321219] [2020-07-17 12:00:01,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 12:00:01,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:01,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 12:00:01,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:00:01,353 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-17 12:00:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:01,449 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-17 12:00:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:00:01,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-17 12:00:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:01,451 INFO L225 Difference]: With dead ends: 40 [2020-07-17 12:00:01,452 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 12:00:01,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:00:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 12:00:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-17 12:00:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-17 12:00:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-17 12:00:01,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-17 12:00:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:01,459 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-17 12:00:01,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 12:00:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-17 12:00:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 12:00:01,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:01,460 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:01,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:01,674 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-17 12:00:01,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:01,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014803756] [2020-07-17 12:00:01,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 12:00:01,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014803756] [2020-07-17 12:00:01,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970423582] [2020-07-17 12:00:01,855 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 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 [2020-07-17 12:00:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:01,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-17 12:00:01,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 12:00:01,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:01,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-17 12:00:01,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118306196] [2020-07-17 12:00:01,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 12:00:01,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:01,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 12:00:01,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:00:01,950 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-17 12:00:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:02,054 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-17 12:00:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:00:02,055 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-17 12:00:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:02,056 INFO L225 Difference]: With dead ends: 43 [2020-07-17 12:00:02,056 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 12:00:02,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-17 12:00:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 12:00:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-17 12:00:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 12:00:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-17 12:00:02,070 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-17 12:00:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:02,071 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-17 12:00:02,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 12:00:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-17 12:00:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 12:00:02,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:02,075 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:02,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:02,276 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-17 12:00:02,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:02,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779061519] [2020-07-17 12:00:02,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 12:00:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779061519] [2020-07-17 12:00:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132715822] [2020-07-17 12:00:02,530 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 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 [2020-07-17 12:00:02,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:00:02,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:02,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-17 12:00:02,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 12:00:02,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:02,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-17 12:00:02,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675616936] [2020-07-17 12:00:02,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 12:00:02,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:02,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 12:00:02,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-17 12:00:02,626 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-17 12:00:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:02,779 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-17 12:00:02,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 12:00:02,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-17 12:00:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:02,781 INFO L225 Difference]: With dead ends: 46 [2020-07-17 12:00:02,781 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 12:00:02,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-17 12:00:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 12:00:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 12:00:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 12:00:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-17 12:00:02,788 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-17 12:00:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:02,789 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-17 12:00:02,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 12:00:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-17 12:00:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 12:00:02,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:02,790 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:03,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 12:00:03,007 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-17 12:00:03,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:03,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545558645] [2020-07-17 12:00:03,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 12:00:03,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545558645] [2020-07-17 12:00:03,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800393454] [2020-07-17 12:00:03,274 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 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 [2020-07-17 12:00:03,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-17 12:00:03,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:03,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-17 12:00:03,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 12:00:03,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:03,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2020-07-17 12:00:03,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470772667] [2020-07-17 12:00:03,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-17 12:00:03,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:03,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-17 12:00:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 12:00:03,778 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2020-07-17 12:00:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:04,300 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-17 12:00:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 12:00:04,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2020-07-17 12:00:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:04,306 INFO L225 Difference]: With dead ends: 49 [2020-07-17 12:00:04,306 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 12:00:04,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 12:00:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 12:00:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-17 12:00:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 12:00:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-17 12:00:04,314 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-17 12:00:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:04,314 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-17 12:00:04,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-17 12:00:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-17 12:00:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-17 12:00:04,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:04,316 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:04,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:04,532 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:04,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-17 12:00:04,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:04,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157080708] [2020-07-17 12:00:04,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-17 12:00:04,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157080708] [2020-07-17 12:00:04,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213943006] [2020-07-17 12:00:04,886 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 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 [2020-07-17 12:00:04,922 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:00:04,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:04,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-17 12:00:04,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-17 12:00:04,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:04,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-17 12:00:04,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891867992] [2020-07-17 12:00:04,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 12:00:04,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:04,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 12:00:04,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:00:04,997 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-17 12:00:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:05,154 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-17 12:00:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:00:05,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-17 12:00:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:05,156 INFO L225 Difference]: With dead ends: 52 [2020-07-17 12:00:05,156 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 12:00:05,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-17 12:00:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 12:00:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-17 12:00:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 12:00:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-17 12:00:05,164 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-17 12:00:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:05,164 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-17 12:00:05,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 12:00:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-17 12:00:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 12:00:05,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:05,166 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:05,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:05,376 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:05,377 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-17 12:00:05,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:05,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708957206] [2020-07-17 12:00:05,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-17 12:00:05,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708957206] [2020-07-17 12:00:05,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745929374] [2020-07-17 12:00:05,750 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 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 [2020-07-17 12:00:05,827 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-17 12:00:05,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:05,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-17 12:00:05,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-17 12:00:05,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:05,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-17 12:00:05,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655066868] [2020-07-17 12:00:05,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 12:00:05,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:05,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 12:00:05,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-17 12:00:05,894 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-17 12:00:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:06,074 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-17 12:00:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 12:00:06,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-17 12:00:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:06,076 INFO L225 Difference]: With dead ends: 55 [2020-07-17 12:00:06,076 INFO L226 Difference]: Without dead ends: 51 [2020-07-17 12:00:06,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-17 12:00:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-17 12:00:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-17 12:00:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 12:00:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-17 12:00:06,091 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-17 12:00:06,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:06,093 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-17 12:00:06,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 12:00:06,093 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-17 12:00:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-17 12:00:06,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:06,096 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:06,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-17 12:00:06,311 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:06,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-17 12:00:06,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:06,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120094143] [2020-07-17 12:00:06,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-17 12:00:06,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120094143] [2020-07-17 12:00:06,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660849408] [2020-07-17 12:00:06,699 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 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 [2020-07-17 12:00:06,753 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-17 12:00:06,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:06,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-17 12:00:06,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-17 12:00:07,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:07,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2020-07-17 12:00:07,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657240384] [2020-07-17 12:00:07,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-17 12:00:07,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:07,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-17 12:00:07,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 12:00:07,386 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 44 states. [2020-07-17 12:00:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:08,114 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-17 12:00:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 12:00:08,115 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 85 [2020-07-17 12:00:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:08,117 INFO L225 Difference]: With dead ends: 58 [2020-07-17 12:00:08,117 INFO L226 Difference]: Without dead ends: 54 [2020-07-17 12:00:08,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=864, Invalid=3828, Unknown=0, NotChecked=0, Total=4692 [2020-07-17 12:00:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-17 12:00:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-17 12:00:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 12:00:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-17 12:00:08,126 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-17 12:00:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:08,126 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-17 12:00:08,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-17 12:00:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-17 12:00:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-17 12:00:08,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:08,128 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:08,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-17 12:00:08,341 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:08,342 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-17 12:00:08,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:08,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227205653] [2020-07-17 12:00:08,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-17 12:00:08,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227205653] [2020-07-17 12:00:08,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341025873] [2020-07-17 12:00:08,865 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:08,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-17 12:00:08,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-17 12:00:08,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:08,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-17 12:00:08,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685382620] [2020-07-17 12:00:08,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 12:00:08,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:08,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 12:00:08,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:00:08,997 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-17 12:00:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:09,186 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-17 12:00:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 12:00:09,187 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-17 12:00:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:09,188 INFO L225 Difference]: With dead ends: 61 [2020-07-17 12:00:09,188 INFO L226 Difference]: Without dead ends: 57 [2020-07-17 12:00:09,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 12:00:09,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-17 12:00:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-17 12:00:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 12:00:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-17 12:00:09,195 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-17 12:00:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:09,196 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-17 12:00:09,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 12:00:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-17 12:00:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-17 12:00:09,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:09,197 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:09,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-17 12:00:09,412 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:09,413 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-17 12:00:09,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:09,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816281606] [2020-07-17 12:00:09,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-17 12:00:09,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816281606] [2020-07-17 12:00:09,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944841533] [2020-07-17 12:00:09,900 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:09,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:00:09,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:09,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-17 12:00:09,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-17 12:00:10,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:10,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-17 12:00:10,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385193238] [2020-07-17 12:00:10,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 12:00:10,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 12:00:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:00:10,011 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-17 12:00:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:10,216 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-17 12:00:10,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 12:00:10,219 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-17 12:00:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:10,220 INFO L225 Difference]: With dead ends: 64 [2020-07-17 12:00:10,220 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 12:00:10,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 12:00:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 12:00:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-17 12:00:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 12:00:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-17 12:00:10,226 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-17 12:00:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:10,227 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-17 12:00:10,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 12:00:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-17 12:00:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-17 12:00:10,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:10,228 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:10,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:10,429 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:10,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:10,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-17 12:00:10,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:10,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027175781] [2020-07-17 12:00:10,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-17 12:00:10,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027175781] [2020-07-17 12:00:10,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244000545] [2020-07-17 12:00:10,985 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:11,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-17 12:00:11,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:11,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-17 12:00:11,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-17 12:00:11,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:11,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-07-17 12:00:11,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832952059] [2020-07-17 12:00:11,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 12:00:11,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:11,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 12:00:11,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-17 12:00:11,102 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-07-17 12:00:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:11,340 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-17 12:00:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 12:00:11,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-07-17 12:00:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:11,344 INFO L225 Difference]: With dead ends: 67 [2020-07-17 12:00:11,344 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 12:00:11,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 12:00:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 12:00:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-17 12:00:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-17 12:00:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-17 12:00:11,358 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-17 12:00:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:11,359 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-17 12:00:11,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 12:00:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-17 12:00:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-17 12:00:11,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:11,361 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:11,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-17 12:00:11,562 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:11,563 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-17 12:00:11,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:11,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411031278] [2020-07-17 12:00:11,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-17 12:00:12,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411031278] [2020-07-17 12:00:12,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925313843] [2020-07-17 12:00:12,113 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:12,156 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:00:12,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:12,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-17 12:00:12,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-17 12:00:12,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:12,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-07-17 12:00:12,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954694545] [2020-07-17 12:00:12,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 12:00:12,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 12:00:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-17 12:00:12,219 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-07-17 12:00:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:12,467 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-17 12:00:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 12:00:12,468 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-07-17 12:00:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:12,469 INFO L225 Difference]: With dead ends: 70 [2020-07-17 12:00:12,470 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 12:00:12,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 12:00:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 12:00:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-17 12:00:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-17 12:00:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-17 12:00:12,476 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-17 12:00:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:12,476 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-17 12:00:12,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 12:00:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-17 12:00:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-17 12:00:12,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:12,478 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:12,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-17 12:00:12,693 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-07-17 12:00:12,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:12,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592104066] [2020-07-17 12:00:12,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-17 12:00:13,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592104066] [2020-07-17 12:00:13,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622396110] [2020-07-17 12:00:13,332 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:13,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-07-17 12:00:13,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:13,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-17 12:00:13,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-17 12:00:14,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:14,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2020-07-17 12:00:14,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307319259] [2020-07-17 12:00:14,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-17 12:00:14,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-17 12:00:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2020-07-17 12:00:14,444 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2020-07-17 12:00:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:15,583 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-17 12:00:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-17 12:00:15,583 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2020-07-17 12:00:15,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:15,585 INFO L225 Difference]: With dead ends: 73 [2020-07-17 12:00:15,585 INFO L226 Difference]: Without dead ends: 69 [2020-07-17 12:00:15,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2020-07-17 12:00:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-17 12:00:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-17 12:00:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-17 12:00:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-17 12:00:15,594 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-17 12:00:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:15,595 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-17 12:00:15,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-17 12:00:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-17 12:00:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-17 12:00:15,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:15,596 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:15,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-17 12:00:15,812 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-07-17 12:00:15,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:15,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288104129] [2020-07-17 12:00:15,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-17 12:00:16,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288104129] [2020-07-17 12:00:16,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412810939] [2020-07-17 12:00:16,609 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:16,684 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-17 12:00:16,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:16,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-17 12:00:16,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-17 12:00:17,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:17,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2020-07-17 12:00:17,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197534024] [2020-07-17 12:00:17,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-17 12:00:17,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:17,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-17 12:00:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2020-07-17 12:00:17,822 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2020-07-17 12:00:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:19,116 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-17 12:00:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-17 12:00:19,117 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2020-07-17 12:00:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:19,119 INFO L225 Difference]: With dead ends: 76 [2020-07-17 12:00:19,119 INFO L226 Difference]: Without dead ends: 72 [2020-07-17 12:00:19,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2020-07-17 12:00:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-17 12:00:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-17 12:00:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-17 12:00:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-17 12:00:19,128 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-17 12:00:19,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:19,129 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-17 12:00:19,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-17 12:00:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-17 12:00:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-17 12:00:19,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:19,130 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:19,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:19,333 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:19,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-07-17 12:00:19,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:19,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746911973] [2020-07-17 12:00:19,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-17 12:00:20,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746911973] [2020-07-17 12:00:20,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082463827] [2020-07-17 12:00:20,224 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-17 12:00:20,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-17 12:00:20,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:20,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-07-17 12:00:20,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066023881] [2020-07-17 12:00:20,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 12:00:20,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 12:00:20,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-17 12:00:20,360 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-07-17 12:00:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:20,680 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-17 12:00:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 12:00:20,681 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-07-17 12:00:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:20,682 INFO L225 Difference]: With dead ends: 79 [2020-07-17 12:00:20,682 INFO L226 Difference]: Without dead ends: 75 [2020-07-17 12:00:20,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 12:00:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-17 12:00:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-17 12:00:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-17 12:00:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-17 12:00:20,693 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-17 12:00:20,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:20,698 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-17 12:00:20,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 12:00:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-17 12:00:20,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-17 12:00:20,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:20,700 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:20,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:20,914 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:20,915 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-07-17 12:00:20,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:20,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974218913] [2020-07-17 12:00:20,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-17 12:00:21,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974218913] [2020-07-17 12:00:21,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778077285] [2020-07-17 12:00:21,945 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:22,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:00:22,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:22,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-17 12:00:22,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-17 12:00:22,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:22,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-07-17 12:00:22,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644408977] [2020-07-17 12:00:22,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 12:00:22,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:22,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 12:00:22,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-07-17 12:00:22,156 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 27 states. [2020-07-17 12:00:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:22,516 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-17 12:00:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 12:00:22,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 133 [2020-07-17 12:00:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:22,518 INFO L225 Difference]: With dead ends: 82 [2020-07-17 12:00:22,518 INFO L226 Difference]: Without dead ends: 78 [2020-07-17 12:00:22,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 12:00:22,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-17 12:00:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-17 12:00:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-17 12:00:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-17 12:00:22,524 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-17 12:00:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:22,525 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-17 12:00:22,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 12:00:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-17 12:00:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-17 12:00:22,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:22,526 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:22,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-17 12:00:22,739 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:22,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-07-17 12:00:22,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:22,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836592678] [2020-07-17 12:00:22,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-17 12:00:23,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836592678] [2020-07-17 12:00:23,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099143309] [2020-07-17 12:00:23,744 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:23,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-07-17 12:00:23,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:23,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-17 12:00:23,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-17 12:00:23,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:23,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-07-17 12:00:23,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969958351] [2020-07-17 12:00:23,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-17 12:00:23,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:23,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-17 12:00:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-07-17 12:00:23,913 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 28 states. [2020-07-17 12:00:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:24,263 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-07-17 12:00:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 12:00:24,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 139 [2020-07-17 12:00:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:24,268 INFO L225 Difference]: With dead ends: 85 [2020-07-17 12:00:24,268 INFO L226 Difference]: Without dead ends: 81 [2020-07-17 12:00:24,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 12:00:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-17 12:00:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-17 12:00:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-17 12:00:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-07-17 12:00:24,277 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-07-17 12:00:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:24,278 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-07-17 12:00:24,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-17 12:00:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-07-17 12:00:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-17 12:00:24,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:24,279 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:24,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-17 12:00:24,480 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-07-17 12:00:24,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:24,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723204573] [2020-07-17 12:00:24,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-17 12:00:25,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723204573] [2020-07-17 12:00:25,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607989501] [2020-07-17 12:00:25,541 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:25,626 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:00:25,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:25,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-17 12:00:25,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-17 12:00:25,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:25,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-07-17 12:00:25,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38027135] [2020-07-17 12:00:25,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-17 12:00:25,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-17 12:00:25,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-07-17 12:00:25,736 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 29 states. [2020-07-17 12:00:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:26,082 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-07-17 12:00:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 12:00:26,083 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 145 [2020-07-17 12:00:26,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:26,084 INFO L225 Difference]: With dead ends: 88 [2020-07-17 12:00:26,084 INFO L226 Difference]: Without dead ends: 84 [2020-07-17 12:00:26,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 12:00:26,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-17 12:00:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-07-17 12:00:26,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-17 12:00:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-07-17 12:00:26,090 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-07-17 12:00:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:26,090 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-07-17 12:00:26,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-17 12:00:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-07-17 12:00:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-17 12:00:26,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:26,092 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:26,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:26,304 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-07-17 12:00:26,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:26,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198577791] [2020-07-17 12:00:26,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-17 12:00:27,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198577791] [2020-07-17 12:00:27,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930249752] [2020-07-17 12:00:27,273 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:27,348 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-07-17 12:00:27,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:27,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-17 12:00:27,353 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-17 12:00:27,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:27,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-07-17 12:00:27,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012778023] [2020-07-17 12:00:27,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-17 12:00:27,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:27,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-17 12:00:27,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-07-17 12:00:27,444 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 30 states. [2020-07-17 12:00:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:27,870 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-17 12:00:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 12:00:27,871 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2020-07-17 12:00:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:27,872 INFO L225 Difference]: With dead ends: 91 [2020-07-17 12:00:27,873 INFO L226 Difference]: Without dead ends: 87 [2020-07-17 12:00:27,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1031, Invalid=1831, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 12:00:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-17 12:00:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-17 12:00:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-17 12:00:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-07-17 12:00:27,878 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-07-17 12:00:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:27,878 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-07-17 12:00:27,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-17 12:00:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-07-17 12:00:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-17 12:00:27,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:27,880 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:28,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-17 12:00:28,092 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-07-17 12:00:28,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:28,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371434340] [2020-07-17 12:00:28,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-17 12:00:29,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371434340] [2020-07-17 12:00:29,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865358100] [2020-07-17 12:00:29,334 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:29,418 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-07-17 12:00:29,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:29,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-17 12:00:29,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-17 12:00:29,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:29,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-07-17 12:00:29,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402298832] [2020-07-17 12:00:29,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-17 12:00:29,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:29,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-17 12:00:29,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2020-07-17 12:00:29,531 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 31 states. [2020-07-17 12:00:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:29,946 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-07-17 12:00:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 12:00:29,947 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 157 [2020-07-17 12:00:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:29,948 INFO L225 Difference]: With dead ends: 94 [2020-07-17 12:00:29,948 INFO L226 Difference]: Without dead ends: 90 [2020-07-17 12:00:29,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 12:00:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-17 12:00:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-17 12:00:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-17 12:00:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-17 12:00:29,954 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-07-17 12:00:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:29,954 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-17 12:00:29,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-17 12:00:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-17 12:00:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-17 12:00:29,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:29,956 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:30,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:30,157 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:30,158 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-07-17 12:00:30,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:30,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762092778] [2020-07-17 12:00:30,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:00:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:00:30,219 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:00:30,219 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:00:30,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 12:00:30,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:00:30 BoogieIcfgContainer [2020-07-17 12:00:30,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:00:30,289 INFO L168 Benchmark]: Toolchain (without parser) took 34001.16 ms. Allocated memory was 136.8 MB in the beginning and 669.5 MB in the end (delta: 532.7 MB). Free memory was 101.5 MB in the beginning and 343.8 MB in the end (delta: -242.3 MB). Peak memory consumption was 290.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:30,290 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 136.8 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 12:00:30,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.26 ms. Allocated memory is still 136.8 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:30,290 INFO L168 Benchmark]: Boogie Preprocessor took 28.74 ms. Allocated memory is still 136.8 MB. Free memory was 91.9 MB in the beginning and 90.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:30,291 INFO L168 Benchmark]: RCFGBuilder took 313.69 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.3 MB in the beginning and 170.0 MB in the end (delta: -79.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:30,291 INFO L168 Benchmark]: TraceAbstraction took 33389.75 ms. Allocated memory was 200.8 MB in the beginning and 669.5 MB in the end (delta: 468.7 MB). Free memory was 169.0 MB in the beginning and 343.8 MB in the end (delta: -174.9 MB). Peak memory consumption was 293.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:30,293 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 136.8 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.26 ms. Allocated memory is still 136.8 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.74 ms. Allocated memory is still 136.8 MB. Free memory was 91.9 MB in the beginning and 90.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.69 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.3 MB in the beginning and 170.0 MB in the end (delta: -79.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33389.75 ms. Allocated memory was 200.8 MB in the beginning and 669.5 MB in the end (delta: 468.7 MB). Free memory was 169.0 MB in the beginning and 343.8 MB in the end (delta: -174.9 MB). Peak memory consumption was 293.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 25; VAL [input=25] [L11] CALL, EXPR id(input) VAL [\old(x)=25] [L5] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L6] CALL, EXPR id(x-1) VAL [\old(x)=24] [L5] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L6] CALL, EXPR id(x-1) VAL [\old(x)=23] [L5] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L6] CALL, EXPR id(x-1) VAL [\old(x)=22] [L5] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L6] CALL, EXPR id(x-1) VAL [\old(x)=21] [L5] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L6] CALL, EXPR id(x-1) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=25, input=25] [L11] int result = id(input); [L12] COND TRUE result == 25 VAL [input=25, result=25] [L13] __VERIFIER_error() VAL [input=25, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 33.2s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 1088 SDslu, 2422 SDs, 0 SdLazy, 1549 SolverSat, 344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3577 GetRequests, 2631 SyntacticMatches, 0 SemanticMatches, 946 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10104 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 17.2s InterpolantComputationTime, 4400 NumberOfCodeBlocks, 4400 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4188 ConstructedInterpolants, 0 QuantifiedInterpolants, 1115760 SizeOfPredicates, 278 NumberOfNonLiveVariables, 4968 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...