/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/bitvector/jain_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:12:33,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:12:33,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:12:33,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 23:12:33,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 23:12:33,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 23:12:33,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 23:12:33,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 23:12:33,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 23:12:33,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 23:12:33,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 23:12:33,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 23:12:33,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 23:12:33,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 23:12:33,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 23:12:33,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 23:12:33,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 23:12:33,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 23:12:33,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 23:12:33,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 23:12:33,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 23:12:33,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 23:12:33,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 23:12:33,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 23:12:33,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 23:12:33,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 23:12:33,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 23:12:34,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 23:12:34,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:12:34,054 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:12:34,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:12:34,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:12:34,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:12:34,060 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:12:34,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:12:34,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:12:34,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:12:34,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:12:34,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:12:34,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:12:34,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:12:34,063 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:12:34,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:12:34,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:12:34,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:12:34,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:12:34,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:12:34,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:12:34,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:12:34,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:12:34,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:12:34,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:12:34,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:12:34,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:12:34,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:12:34,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:12:34,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:12:34,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:12:34,489 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:12:34,492 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:12:34,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/jain_5-2.c [2020-12-21 23:12:34,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dea89492/6c6b3242c4614c569c6e8ec54ef9f513/FLAG793696cfe [2020-12-21 23:12:35,297 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:12:35,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/jain_5-2.c [2020-12-21 23:12:35,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dea89492/6c6b3242c4614c569c6e8ec54ef9f513/FLAG793696cfe [2020-12-21 23:12:35,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dea89492/6c6b3242c4614c569c6e8ec54ef9f513 [2020-12-21 23:12:35,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:12:35,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:12:35,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:12:35,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:12:35,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:12:35,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b1e858b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35, skipping insertion in model container [2020-12-21 23:12:35,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:12:35,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:12:35,845 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/jain_5-2.c[360,373] [2020-12-21 23:12:35,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:12:35,870 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:12:35,886 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/jain_5-2.c[360,373] [2020-12-21 23:12:35,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:12:35,904 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:12:35,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35 WrapperNode [2020-12-21 23:12:35,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:12:35,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:12:35,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:12:35,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:12:35,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:12:35,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:12:35,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:12:35,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:12:35,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... [2020-12-21 23:12:35,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:12:35,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:12:35,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:12:35,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:12:35,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:12:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:12:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:12:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:12:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:12:36,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:12:36,278 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-21 23:12:36,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:12:36 BoogieIcfgContainer [2020-12-21 23:12:36,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:12:36,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:12:36,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:12:36,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:12:36,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:12:35" (1/3) ... [2020-12-21 23:12:36,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b19e84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:12:36, skipping insertion in model container [2020-12-21 23:12:36,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:12:35" (2/3) ... [2020-12-21 23:12:36,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b19e84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:12:36, skipping insertion in model container [2020-12-21 23:12:36,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:12:36" (3/3) ... [2020-12-21 23:12:36,291 INFO L111 eAbstractionObserver]: Analyzing ICFG jain_5-2.c [2020-12-21 23:12:36,299 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:12:36,305 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:12:36,327 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:12:36,356 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:12:36,357 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:12:36,357 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:12:36,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:12:36,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:12:36,358 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:12:36,358 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:12:36,358 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:12:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-21 23:12:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-21 23:12:36,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:36,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-21 23:12:36,410 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:36,428 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-21 23:12:36,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:36,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089337115] [2020-12-21 23:12:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:36,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089337115] [2020-12-21 23:12:36,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:12:36,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 23:12:36,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142589258] [2020-12-21 23:12:36,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:12:36,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:36,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:12:36,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:12:36,772 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2020-12-21 23:12:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:36,808 INFO L93 Difference]: Finished difference Result 16 states and 24 transitions. [2020-12-21 23:12:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:12:36,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-21 23:12:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:36,821 INFO L225 Difference]: With dead ends: 16 [2020-12-21 23:12:36,821 INFO L226 Difference]: Without dead ends: 8 [2020-12-21 23:12:36,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:12:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-21 23:12:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-21 23:12:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-21 23:12:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-21 23:12:36,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2020-12-21 23:12:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:36,884 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-21 23:12:36,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:12:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-21 23:12:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 23:12:36,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:36,885 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-21 23:12:36,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:12:36,888 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1810804418, now seen corresponding path program 1 times [2020-12-21 23:12:36,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:36,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943493395] [2020-12-21 23:12:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:37,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943493395] [2020-12-21 23:12:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180408751] [2020-12-21 23:12:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:37,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 23:12:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:37,336 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:37,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:12:37,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-12-21 23:12:37,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025447065] [2020-12-21 23:12:37,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 23:12:37,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 23:12:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 23:12:37,363 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2020-12-21 23:12:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:37,396 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-21 23:12:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:12:37,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2020-12-21 23:12:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:37,398 INFO L225 Difference]: With dead ends: 13 [2020-12-21 23:12:37,398 INFO L226 Difference]: Without dead ends: 11 [2020-12-21 23:12:37,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 23:12:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-21 23:12:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-12-21 23:12:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-21 23:12:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-21 23:12:37,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-21 23:12:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:37,403 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-21 23:12:37,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 23:12:37,404 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-21 23:12:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 23:12:37,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:37,404 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2020-12-21 23:12:37,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 23:12:37,619 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash 721435418, now seen corresponding path program 2 times [2020-12-21 23:12:37,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:37,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267515925] [2020-12-21 23:12:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:37,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267515925] [2020-12-21 23:12:37,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555436400] [2020-12-21 23:12:37,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:37,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:12:37,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:37,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 23:12:37,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:38,021 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:38,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 23:12:38,351 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:38,611 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:39,042 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:39,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:39,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 23:12:39,596 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-21 23:12:39,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:12:39,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 23:12:39,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018919075] [2020-12-21 23:12:39,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:12:39,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:39,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:12:39,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:12:39,598 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2020-12-21 23:12:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:39,647 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-21 23:12:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 23:12:39,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-21 23:12:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:39,648 INFO L225 Difference]: With dead ends: 14 [2020-12-21 23:12:39,648 INFO L226 Difference]: Without dead ends: 12 [2020-12-21 23:12:39,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:12:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-21 23:12:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-21 23:12:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-21 23:12:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-21 23:12:39,653 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-12-21 23:12:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:39,653 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-21 23:12:39,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:12:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-21 23:12:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 23:12:39,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:39,654 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2020-12-21 23:12:39,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:39,870 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:39,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1809846642, now seen corresponding path program 3 times [2020-12-21 23:12:39,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:39,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574374056] [2020-12-21 23:12:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:39,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574374056] [2020-12-21 23:12:39,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429731814] [2020-12-21 23:12:39,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:40,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 23:12:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:40,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 23:12:40,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:40,219 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:40,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-21 23:12:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:40,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:12:40,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-12-21 23:12:40,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600955083] [2020-12-21 23:12:40,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 23:12:40,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 23:12:40,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-12-21 23:12:40,387 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2020-12-21 23:12:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:40,464 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-21 23:12:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:12:40,465 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-21 23:12:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:40,466 INFO L225 Difference]: With dead ends: 17 [2020-12-21 23:12:40,466 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 23:12:40,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-12-21 23:12:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 23:12:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-21 23:12:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 23:12:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-21 23:12:40,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-12-21 23:12:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:40,471 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-21 23:12:40,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 23:12:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-21 23:12:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 23:12:40,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:40,472 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2020-12-21 23:12:40,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:40,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash -198987318, now seen corresponding path program 4 times [2020-12-21 23:12:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:40,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522068521] [2020-12-21 23:12:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:40,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522068521] [2020-12-21 23:12:40,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225753690] [2020-12-21 23:12:40,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:40,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:12:40,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:40,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 23:12:40,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:41,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:41,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:12:41,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2020-12-21 23:12:41,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021834178] [2020-12-21 23:12:41,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 23:12:41,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 23:12:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-21 23:12:41,074 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 16 states. [2020-12-21 23:12:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:41,142 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-21 23:12:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 23:12:41,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-21 23:12:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:41,144 INFO L225 Difference]: With dead ends: 19 [2020-12-21 23:12:41,144 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 23:12:41,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:12:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 23:12:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-21 23:12:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 23:12:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-21 23:12:41,148 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-12-21 23:12:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:41,149 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-21 23:12:41,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 23:12:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-21 23:12:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 23:12:41,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:41,150 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2020-12-21 23:12:41,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:41,366 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2046860322, now seen corresponding path program 5 times [2020-12-21 23:12:41,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:41,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746899153] [2020-12-21 23:12:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:41,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746899153] [2020-12-21 23:12:41,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047117871] [2020-12-21 23:12:41,472 INFO L93 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 [2020-12-21 23:12:41,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 23:12:41,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:41,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-21 23:12:41,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:42,002 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:42,096 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:42,311 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:42,769 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:43,489 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:44,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 15 disjuncts [2020-12-21 23:12:44,785 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:44,885 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-21 23:12:44,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:12:44,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 23:12:44,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971243588] [2020-12-21 23:12:44,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 23:12:44,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:44,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 23:12:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-12-21 23:12:44,889 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-12-21 23:12:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:45,012 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-21 23:12:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 23:12:45,013 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-21 23:12:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:45,013 INFO L225 Difference]: With dead ends: 20 [2020-12-21 23:12:45,014 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 23:12:45,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-12-21 23:12:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 23:12:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-21 23:12:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 23:12:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-21 23:12:45,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-12-21 23:12:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:45,019 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-21 23:12:45,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 23:12:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-21 23:12:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 23:12:45,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:45,020 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2020-12-21 23:12:45,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 23:12:45,225 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:45,226 INFO L82 PathProgramCache]: Analyzing trace with hash -62107526, now seen corresponding path program 6 times [2020-12-21 23:12:45,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:45,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594491609] [2020-12-21 23:12:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:45,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594491609] [2020-12-21 23:12:45,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648994827] [2020-12-21 23:12:45,358 INFO L93 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 [2020-12-21 23:12:45,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 23:12:45,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:45,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-21 23:12:45,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:45,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:45,924 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:45,967 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:46,078 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:46,283 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:46,509 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:46,735 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:46,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:47,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:12:47,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2020-12-21 23:12:47,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454653284] [2020-12-21 23:12:47,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 23:12:47,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:47,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 23:12:47,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-12-21 23:12:47,028 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 20 states. [2020-12-21 23:12:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:47,167 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-21 23:12:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 23:12:47,167 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 17 [2020-12-21 23:12:47,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:47,168 INFO L225 Difference]: With dead ends: 23 [2020-12-21 23:12:47,168 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 23:12:47,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-12-21 23:12:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 23:12:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-21 23:12:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 23:12:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-21 23:12:47,173 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-12-21 23:12:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:47,173 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-21 23:12:47,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 23:12:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-21 23:12:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 23:12:47,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:47,174 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2020-12-21 23:12:47,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:47,381 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash 444354258, now seen corresponding path program 7 times [2020-12-21 23:12:47,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:47,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765011521] [2020-12-21 23:12:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:47,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765011521] [2020-12-21 23:12:47,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339053879] [2020-12-21 23:12:47,572 INFO L93 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 [2020-12-21 23:12:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:47,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-21 23:12:47,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:48,180 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:48,224 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:48,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 23:12:48,324 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 23:12:48,351 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:48,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:12:48,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2020-12-21 23:12:48,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983487663] [2020-12-21 23:12:48,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 23:12:48,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:48,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 23:12:48,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-12-21 23:12:48,486 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 25 states. [2020-12-21 23:12:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:48,689 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-21 23:12:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 23:12:48,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 19 [2020-12-21 23:12:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:48,701 INFO L225 Difference]: With dead ends: 25 [2020-12-21 23:12:48,701 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 23:12:48,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2020-12-21 23:12:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 23:12:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-21 23:12:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 23:12:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-21 23:12:48,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-12-21 23:12:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:48,713 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-21 23:12:48,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 23:12:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-21 23:12:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 23:12:48,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:48,715 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2020-12-21 23:12:48,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:48,931 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1822824234, now seen corresponding path program 8 times [2020-12-21 23:12:48,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:48,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427278828] [2020-12-21 23:12:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:49,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427278828] [2020-12-21 23:12:49,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105417881] [2020-12-21 23:12:49,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 23:12:49,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:12:49,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:49,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-21 23:12:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:49,466 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:49,490 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:49,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:49,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:12:49,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2020-12-21 23:12:49,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442595484] [2020-12-21 23:12:49,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 23:12:49,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:49,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 23:12:49,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-12-21 23:12:49,561 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2020-12-21 23:12:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:49,870 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-21 23:12:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 23:12:49,871 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-12-21 23:12:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:49,872 INFO L225 Difference]: With dead ends: 27 [2020-12-21 23:12:49,872 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 23:12:49,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2020-12-21 23:12:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 23:12:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-21 23:12:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 23:12:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-21 23:12:49,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-12-21 23:12:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:49,878 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-21 23:12:49,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 23:12:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-21 23:12:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 23:12:49,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:49,879 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1] [2020-12-21 23:12:50,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 23:12:50,081 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash -612423294, now seen corresponding path program 9 times [2020-12-21 23:12:50,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:50,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578961927] [2020-12-21 23:12:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:50,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578961927] [2020-12-21 23:12:50,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408485709] [2020-12-21 23:12:50,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 23:12:50,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 23:12:50,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:50,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-21 23:12:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:51,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:51,174 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:51,231 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:51,331 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:51,588 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:51,880 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:51,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:12:51,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 29 [2020-12-21 23:12:51,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869894140] [2020-12-21 23:12:51,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 23:12:51,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:51,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 23:12:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2020-12-21 23:12:51,999 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 29 states. [2020-12-21 23:12:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:52,324 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-21 23:12:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 23:12:52,324 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 23 [2020-12-21 23:12:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:52,325 INFO L225 Difference]: With dead ends: 29 [2020-12-21 23:12:52,325 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 23:12:52,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2020-12-21 23:12:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 23:12:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-21 23:12:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 23:12:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-21 23:12:52,331 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-12-21 23:12:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:52,331 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-21 23:12:52,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 23:12:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-21 23:12:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 23:12:52,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:52,332 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1] [2020-12-21 23:12:52,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:52,537 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -128121382, now seen corresponding path program 10 times [2020-12-21 23:12:52,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:52,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695926329] [2020-12-21 23:12:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:52,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695926329] [2020-12-21 23:12:52,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911928368] [2020-12-21 23:12:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 23:12:52,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:12:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:52,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-21 23:12:52,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:53,487 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 23:12:53,504 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:53,616 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:53,819 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:54,100 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:54,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-21 23:12:54,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:12:54,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 23:12:54,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284050076] [2020-12-21 23:12:54,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 23:12:54,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:12:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 23:12:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-12-21 23:12:54,332 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 14 states. [2020-12-21 23:12:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:12:54,658 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-21 23:12:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 23:12:54,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-12-21 23:12:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:12:54,661 INFO L225 Difference]: With dead ends: 30 [2020-12-21 23:12:54,661 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 23:12:54,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 23:12:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 23:12:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-21 23:12:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 23:12:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-21 23:12:54,674 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-12-21 23:12:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:12:54,674 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-21 23:12:54,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 23:12:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-21 23:12:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 23:12:54,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:12:54,676 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1] [2020-12-21 23:12:54,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:12:54,891 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:12:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:12:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1429548082, now seen corresponding path program 11 times [2020-12-21 23:12:54,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:12:54,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430054327] [2020-12-21 23:12:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:12:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:12:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:12:55,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430054327] [2020-12-21 23:12:55,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733810644] [2020-12-21 23:12:55,120 INFO L93 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 [2020-12-21 23:12:55,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 23:12:55,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:12:55,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-21 23:12:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:12:56,689 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:56,728 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:56,805 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:56,967 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2020-12-21 23:12:57,029 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:57,116 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:57,319 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:57,571 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:57,760 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:57,993 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:58,346 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:58,723 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:59,179 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:12:59,756 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:00,572 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:02,121 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:03,322 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:04,496 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:05,650 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:07,042 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:08,404 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:10,032 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:11,695 INFO L757 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:13,506 INFO L757 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:15,492 INFO L757 QuantifierPusher]: Run 210 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:17,632 INFO L757 QuantifierPusher]: Run 220 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:19,956 INFO L757 QuantifierPusher]: Run 230 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:22,443 INFO L757 QuantifierPusher]: Run 240 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:25,111 INFO L757 QuantifierPusher]: Run 250 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:28,157 INFO L757 QuantifierPusher]: Run 260 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:31,044 INFO L757 QuantifierPusher]: Run 270 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:33,960 INFO L757 QuantifierPusher]: Run 280 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:37,126 INFO L757 QuantifierPusher]: Run 290 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:40,586 INFO L757 QuantifierPusher]: Run 300 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:44,644 INFO L757 QuantifierPusher]: Run 310 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:48,458 INFO L757 QuantifierPusher]: Run 320 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:52,367 INFO L757 QuantifierPusher]: Run 330 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:13:56,910 INFO L757 QuantifierPusher]: Run 340 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:01,633 INFO L757 QuantifierPusher]: Run 350 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:06,230 INFO L757 QuantifierPusher]: Run 360 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:11,002 INFO L757 QuantifierPusher]: Run 370 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:16,308 INFO L757 QuantifierPusher]: Run 380 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:21,980 INFO L757 QuantifierPusher]: Run 390 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:28,390 INFO L757 QuantifierPusher]: Run 400 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:34,396 INFO L757 QuantifierPusher]: Run 410 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:40,590 INFO L757 QuantifierPusher]: Run 420 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:47,718 INFO L757 QuantifierPusher]: Run 430 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:14:54,666 INFO L757 QuantifierPusher]: Run 440 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:15:01,585 INFO L757 QuantifierPusher]: Run 450 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:15:09,014 INFO L757 QuantifierPusher]: Run 460 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:15:16,421 INFO L757 QuantifierPusher]: Run 470 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:15:24,187 INFO L757 QuantifierPusher]: Run 480 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:15:32,672 INFO L757 QuantifierPusher]: Run 490 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:15:41,199 INFO L757 QuantifierPusher]: Run 500 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:15:50,046 INFO L757 QuantifierPusher]: Run 510 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:16:00,534 INFO L757 QuantifierPusher]: Run 520 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:16:09,774 INFO L757 QuantifierPusher]: Run 530 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:16:19,903 INFO L757 QuantifierPusher]: Run 540 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:16:30,677 INFO L757 QuantifierPusher]: Run 550 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:16:42,565 INFO L757 QuantifierPusher]: Run 560 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:16:53,391 INFO L757 QuantifierPusher]: Run 570 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-21 23:17:04,637 INFO L757 QuantifierPusher]: Run 580 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.