/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/nla-digbench-scaling/ps6-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:50:35,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:50:35,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:50:35,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:50:35,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:50:35,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:50:35,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:50:35,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:50:35,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:50:35,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:50:35,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:50:35,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:50:35,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:50:35,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:50:35,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:50:35,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:50:35,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:50:35,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:50:35,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:50:35,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:50:35,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:50:35,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:50:35,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:50:35,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:50:35,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:50:35,965 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:50:35,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:50:35,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:50:35,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:50:35,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:50:35,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:50:35,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:50:35,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:50:35,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:50:35,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:50:35,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:50:35,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:50:35,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:50:35,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:50:35,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:50:35,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:50:35,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:50:35,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:50:35,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:50:35,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:50:35,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:50:35,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:50:36,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:50:36,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:50:36,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:50:36,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:50:36,375 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:50:36,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c [2020-12-22 05:50:36,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79d0aa11/210ea381b1e4405bb345b2876d82cb23/FLAG01ecb2969 [2020-12-22 05:50:36,986 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:50:36,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c [2020-12-22 05:50:36,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79d0aa11/210ea381b1e4405bb345b2876d82cb23/FLAG01ecb2969 [2020-12-22 05:50:37,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f79d0aa11/210ea381b1e4405bb345b2876d82cb23 [2020-12-22 05:50:37,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:50:37,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:50:37,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:50:37,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:50:37,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:50:37,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba255e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37, skipping insertion in model container [2020-12-22 05:50:37,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:50:37,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:50:37,593 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/nla-digbench-scaling/ps6-ll_valuebound50.c[458,471] [2020-12-22 05:50:37,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:50:37,623 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:50:37,635 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/nla-digbench-scaling/ps6-ll_valuebound50.c[458,471] [2020-12-22 05:50:37,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:50:37,658 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:50:37,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37 WrapperNode [2020-12-22 05:50:37,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:50:37,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:50:37,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:50:37,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:50:37,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:50:37,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:50:37,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:50:37,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:50:37,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... [2020-12-22 05:50:37,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:50:37,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:50:37,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:50:37,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:50:37,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:50:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:50:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:50:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:50:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:50:38,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:50:38,125 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-22 05:50:38,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:50:38 BoogieIcfgContainer [2020-12-22 05:50:38,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:50:38,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:50:38,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:50:38,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:50:38,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:50:37" (1/3) ... [2020-12-22 05:50:38,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371bc9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:50:38, skipping insertion in model container [2020-12-22 05:50:38,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:37" (2/3) ... [2020-12-22 05:50:38,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371bc9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:50:38, skipping insertion in model container [2020-12-22 05:50:38,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:50:38" (3/3) ... [2020-12-22 05:50:38,138 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.c [2020-12-22 05:50:38,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:50:38,150 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:50:38,172 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:50:38,201 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:50:38,201 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:50:38,201 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:50:38,201 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:50:38,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:50:38,202 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:50:38,202 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:50:38,202 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:50:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 05:50:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:50:38,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:38,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:50:38,254 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-22 05:50:38,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:38,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961706049] [2020-12-22 05:50:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:50:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:50:38,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961706049] [2020-12-22 05:50:38,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:50:38,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:50:38,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425425390] [2020-12-22 05:50:38,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:50:38,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:38,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:50:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:50:38,600 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-22 05:50:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:38,622 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-12-22 05:50:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:50:38,624 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 05:50:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:38,638 INFO L225 Difference]: With dead ends: 43 [2020-12-22 05:50:38,638 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 05:50:38,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:50:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 05:50:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 05:50:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 05:50:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 05:50:38,678 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2020-12-22 05:50:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:38,679 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 05:50:38,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:50:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 05:50:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:50:38,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:38,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:50:38,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:50:38,681 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:38,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-22 05:50:38,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:38,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487341976] [2020-12-22 05:50:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:38,703 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:38,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852306214] [2020-12-22 05:50:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:50:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:50:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:50:38,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:50:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:50:38,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487341976] [2020-12-22 05:50:38,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:50:38,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852306214] [2020-12-22 05:50:38,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:50:38,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:50:38,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965431370] [2020-12-22 05:50:38,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:50:38,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:38,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:50:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:50:38,913 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2020-12-22 05:52:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:52:19,665 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-22 05:52:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:52:19,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 05:52:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:52:19,667 INFO L225 Difference]: With dead ends: 33 [2020-12-22 05:52:19,667 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:52:19,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:52:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:52:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 05:52:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:52:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 05:52:19,674 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2020-12-22 05:52:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:52:19,674 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 05:52:19,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:52:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 05:52:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:52:19,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:52:19,675 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:52:19,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:52:19,891 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:52:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:52:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2020-12-22 05:52:19,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:52:19,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460588177] [2020-12-22 05:52:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:52:19,915 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:52:19,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100500078] [2020-12-22 05:52:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:52:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:52:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:52:19,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:52:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:52:20,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460588177] [2020-12-22 05:52:20,068 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:52:20,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100500078] [2020-12-22 05:52:20,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:52:20,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:52:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953772118] [2020-12-22 05:52:20,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:52:20,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:52:20,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:52:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:52:20,071 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-12-22 05:52:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:52:22,549 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 05:52:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:52:22,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 05:52:22,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:52:22,551 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:52:22,551 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:52:22,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:52:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:52:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-12-22 05:52:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 05:52:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 05:52:22,561 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2020-12-22 05:52:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:52:22,561 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 05:52:22,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:52:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 05:52:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:52:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:52:22,563 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:52:22,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:52:22,778 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:52:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:52:22,780 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2020-12-22 05:52:22,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:52:22,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201674735] [2020-12-22 05:52:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:52:22,806 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:52:22,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919492097] [2020-12-22 05:52:22,807 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:52:22,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:52:22,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:52:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 05:52:22,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:52:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:52:23,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201674735] [2020-12-22 05:52:23,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:52:23,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919492097] [2020-12-22 05:52:23,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:52:23,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:52:23,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642970680] [2020-12-22 05:52:23,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:52:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:52:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:52:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:52:23,060 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-12-22 05:52:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:52:23,168 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-22 05:52:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:52:23,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-22 05:52:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:52:23,170 INFO L225 Difference]: With dead ends: 45 [2020-12-22 05:52:23,170 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 05:52:23,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:52:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 05:52:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-12-22 05:52:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:52:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 05:52:23,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2020-12-22 05:52:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:52:23,180 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 05:52:23,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:52:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 05:52:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:52:23,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:52:23,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:52:23,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:52:23,387 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:52:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:52:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash -531865812, now seen corresponding path program 1 times [2020-12-22 05:52:23,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:52:23,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266442961] [2020-12-22 05:52:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:52:23,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:52:23,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357215771] [2020-12-22 05:52:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:52:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:52:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 05:52:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:52:23,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:52:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:52:23,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266442961] [2020-12-22 05:52:23,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:52:23,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357215771] [2020-12-22 05:52:23,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:52:23,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:52:23,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312714530] [2020-12-22 05:52:23,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:52:23,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:52:23,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:52:23,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:52:23,622 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-12-22 05:52:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:52:23,817 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-22 05:52:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:52:23,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 05:52:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:52:23,819 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:52:23,819 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:52:23,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:52:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:52:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 05:52:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:52:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 05:52:23,827 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2020-12-22 05:52:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:52:23,828 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 05:52:23,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:52:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 05:52:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:52:23,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:52:23,829 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:52:24,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:52:24,044 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:52:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:52:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2020-12-22 05:52:24,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:52:24,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538921141] [2020-12-22 05:52:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:52:24,058 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:52:24,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301778769] [2020-12-22 05:52:24,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true