/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/array-examples/standard_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:33:28,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:33:28,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:33:28,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:33:28,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:33:28,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:33:28,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:33:28,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:33:28,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:33:28,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:33:28,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:33:28,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:33:28,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:33:28,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:33:28,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:33:28,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:33:28,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:33:28,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:33:28,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:33:28,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:33:28,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:33:28,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:33:28,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:33:28,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:33:28,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:33:28,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:33:28,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:33:28,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:33:28,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:33:28,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:33:28,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:33:28,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:33:28,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:33:28,399 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:33:28,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:33:28,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:33:28,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:33:28,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:33:28,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:33:28,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:33:28,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:33:28,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:33:28,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:33:28,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:33:28,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:33:28,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:33:28,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:33:28,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:33:28,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:33:28,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:33:28,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:33:28,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:33:28,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:33:28,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:33:28,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:33:28,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:33:28,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:33:28,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:33:28,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:33:28,781 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:33:28,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init3_ground-1.i [2020-12-21 21:33:28,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0c9c0c1/3a8112872cfd427696c09928deea15ea/FLAG08a6824d1 [2020-12-21 21:33:29,452 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:33:29,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init3_ground-1.i [2020-12-21 21:33:29,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0c9c0c1/3a8112872cfd427696c09928deea15ea/FLAG08a6824d1 [2020-12-21 21:33:29,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0c9c0c1/3a8112872cfd427696c09928deea15ea [2020-12-21 21:33:29,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:33:29,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:33:29,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:29,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:33:29,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:33:29,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:29" (1/1) ... [2020-12-21 21:33:29,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7d0073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:29, skipping insertion in model container [2020-12-21 21:33:29,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:29" (1/1) ... [2020-12-21 21:33:29,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:33:29,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:33:30,039 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/array-examples/standard_init3_ground-1.i[816,829] [2020-12-21 21:33:30,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:30,063 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:33:30,077 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/array-examples/standard_init3_ground-1.i[816,829] [2020-12-21 21:33:30,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:30,100 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:33:30,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30 WrapperNode [2020-12-21 21:33:30,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:30,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:30,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:33:30,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:33:30,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:30,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:33:30,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:33:30,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:33:30,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (1/1) ... [2020-12-21 21:33:30,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:33:30,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:33:30,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:33:30,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:33:30,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (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 21:33:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:33:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:33:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:33:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:33:30,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:33:30,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:33:30,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:33:30,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:33:30,608 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 21:33:30,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:30 BoogieIcfgContainer [2020-12-21 21:33:30,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:33:30,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:33:30,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:33:30,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:33:30,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:33:29" (1/3) ... [2020-12-21 21:33:30,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f32a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:30, skipping insertion in model container [2020-12-21 21:33:30,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:30" (2/3) ... [2020-12-21 21:33:30,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f32a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:30, skipping insertion in model container [2020-12-21 21:33:30,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:30" (3/3) ... [2020-12-21 21:33:30,632 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2020-12-21 21:33:30,640 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:33:30,645 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:33:30,665 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:33:30,721 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:33:30,722 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:33:30,722 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:33:30,722 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:33:30,722 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:33:30,722 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:33:30,723 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:33:30,723 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:33:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-21 21:33:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:33:30,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:30,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:30,774 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:30,782 INFO L82 PathProgramCache]: Analyzing trace with hash -93359874, now seen corresponding path program 1 times [2020-12-21 21:33:30,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:30,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396646523] [2020-12-21 21:33:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:31,033 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 21:33:31,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396646523] [2020-12-21 21:33:31,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:33:31,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:33:31,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236298723] [2020-12-21 21:33:31,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:33:31,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:31,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:33:31,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:33:31,063 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-21 21:33:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:31,157 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2020-12-21 21:33:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:33:31,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:33:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:31,181 INFO L225 Difference]: With dead ends: 36 [2020-12-21 21:33:31,181 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 21:33:31,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:33:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 21:33:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 21:33:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:33:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-21 21:33:31,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-12-21 21:33:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:31,222 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-21 21:33:31,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:33:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-21 21:33:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:33:31,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:31,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:31,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:33:31,226 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash -168681064, now seen corresponding path program 1 times [2020-12-21 21:33:31,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:31,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682776630] [2020-12-21 21:33:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:33:31,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682776630] [2020-12-21 21:33:31,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753224764] [2020-12-21 21:33:31,304 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 21:33:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:33:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:33:31,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:31,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:33:31,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436572379] [2020-12-21 21:33:31,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:33:31,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:33:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:33:31,493 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-21 21:33:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:31,548 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-12-21 21:33:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:33:31,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:33:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:31,550 INFO L225 Difference]: With dead ends: 33 [2020-12-21 21:33:31,550 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:33:31,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:33:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:33:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-21 21:33:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 21:33:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-21 21:33:31,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-12-21 21:33:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:31,557 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-21 21:33:31,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:33:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-21 21:33:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:33:31,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:31,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:31,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:33:31,772 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash -873526594, now seen corresponding path program 2 times [2020-12-21 21:33:31,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:31,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641755474] [2020-12-21 21:33:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:33:31,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641755474] [2020-12-21 21:33:31,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985930694] [2020-12-21 21:33:31,857 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 21:33:31,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:31,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:33:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:33:31,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:31,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:33:31,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100947754] [2020-12-21 21:33:31,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:33:31,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:31,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:33:31,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:33:31,985 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-12-21 21:33:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:32,049 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-12-21 21:33:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:33:32,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-21 21:33:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:32,052 INFO L225 Difference]: With dead ends: 38 [2020-12-21 21:33:32,052 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:33:32,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:33:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:33:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 21:33:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:33:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-21 21:33:32,058 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-12-21 21:33:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:32,059 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-21 21:33:32,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:33:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-21 21:33:32,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:33:32,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:32,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:32,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:32,275 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:32,276 INFO L82 PathProgramCache]: Analyzing trace with hash -778322088, now seen corresponding path program 3 times [2020-12-21 21:33:32,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:32,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887597898] [2020-12-21 21:33:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:33:32,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887597898] [2020-12-21 21:33:32,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709083103] [2020-12-21 21:33:32,362 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 21:33:32,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:33:32,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:33:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:33:32,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:32,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:33:32,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441560586] [2020-12-21 21:33:32,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:33:32,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:32,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:33:32,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:33:32,496 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2020-12-21 21:33:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:32,564 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-12-21 21:33:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:33:32,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-21 21:33:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:32,566 INFO L225 Difference]: With dead ends: 43 [2020-12-21 21:33:32,566 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:33:32,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:33:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:33:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:33:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:33:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-21 21:33:32,573 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2020-12-21 21:33:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:32,573 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-21 21:33:32,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:33:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-21 21:33:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:33:32,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:32,575 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:32,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:32,788 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:32,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1736848510, now seen corresponding path program 4 times [2020-12-21 21:33:32,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:32,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919845221] [2020-12-21 21:33:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:33:32,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919845221] [2020-12-21 21:33:32,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331263317] [2020-12-21 21:33:32,895 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 21:33:33,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:33,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:33,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:33:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:33:33,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:33,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:33:33,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205111266] [2020-12-21 21:33:33,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:33:33,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:33,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:33:33,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:33:33,077 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-12-21 21:33:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:33,148 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-12-21 21:33:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:33:33,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-21 21:33:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:33,150 INFO L225 Difference]: With dead ends: 48 [2020-12-21 21:33:33,150 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 21:33:33,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:33:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 21:33:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-21 21:33:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:33:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-12-21 21:33:33,157 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2020-12-21 21:33:33,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:33,157 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-12-21 21:33:33,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:33:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-12-21 21:33:33,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:33:33,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:33,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:33,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:33,372 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:33,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1884156648, now seen corresponding path program 5 times [2020-12-21 21:33:33,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:33,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916252719] [2020-12-21 21:33:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 21:33:33,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916252719] [2020-12-21 21:33:33,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249471930] [2020-12-21 21:33:33,492 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 21:33:33,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:33:33,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:33,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:33:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 21:33:33,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:33,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:33:33,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494294054] [2020-12-21 21:33:33,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:33:33,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:33,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:33:33,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:33:33,851 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-12-21 21:33:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:33,931 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-12-21 21:33:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:33:33,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-21 21:33:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:33,933 INFO L225 Difference]: With dead ends: 53 [2020-12-21 21:33:33,934 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:33:33,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:33:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:33:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-21 21:33:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:33:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-21 21:33:33,940 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2020-12-21 21:33:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:33,940 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-21 21:33:33,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:33:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-21 21:33:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:33:33,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:33,941 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:34,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:33:34,156 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1909780030, now seen corresponding path program 6 times [2020-12-21 21:33:34,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:34,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907762582] [2020-12-21 21:33:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-21 21:33:34,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907762582] [2020-12-21 21:33:34,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111003393] [2020-12-21 21:33:34,300 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 21:33:34,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:33:34,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:34,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:33:34,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-21 21:33:34,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:34,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:33:34,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290353945] [2020-12-21 21:33:34,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:33:34,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:34,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:33:34,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:33:34,566 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2020-12-21 21:33:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:34,623 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-21 21:33:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:33:34,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-12-21 21:33:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:34,624 INFO L225 Difference]: With dead ends: 58 [2020-12-21 21:33:34,624 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:33:34,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:33:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:33:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-21 21:33:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 21:33:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-12-21 21:33:34,630 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2020-12-21 21:33:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:34,631 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-12-21 21:33:34,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:33:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-12-21 21:33:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:33:34,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:34,632 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:34,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:34,846 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash -571143464, now seen corresponding path program 7 times [2020-12-21 21:33:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:34,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833419992] [2020-12-21 21:33:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-21 21:33:34,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833419992] [2020-12-21 21:33:34,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629140219] [2020-12-21 21:33:34,981 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 21:33:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:33:35,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-21 21:33:35,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:35,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:33:35,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83553011] [2020-12-21 21:33:35,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:33:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:33:35,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:33:35,157 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-12-21 21:33:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:35,220 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-12-21 21:33:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:33:35,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-12-21 21:33:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:35,222 INFO L225 Difference]: With dead ends: 63 [2020-12-21 21:33:35,222 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:33:35,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:33:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:33:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-21 21:33:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:33:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-12-21 21:33:35,228 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2020-12-21 21:33:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:35,228 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-12-21 21:33:35,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:33:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-12-21 21:33:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:33:35,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:35,230 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:35,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:35,444 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:35,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1115371518, now seen corresponding path program 8 times [2020-12-21 21:33:35,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:35,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466796706] [2020-12-21 21:33:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:33:35,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466796706] [2020-12-21 21:33:35,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218770204] [2020-12-21 21:33:35,616 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 21:33:35,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:35,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:33:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:33:35,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:35,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:33:35,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138882713] [2020-12-21 21:33:35,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:33:35,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:33:35,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:33:35,728 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2020-12-21 21:33:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:35,809 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-12-21 21:33:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:33:35,810 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-12-21 21:33:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:35,811 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:33:35,811 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 21:33:35,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:33:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 21:33:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-21 21:33:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:33:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-21 21:33:35,817 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2020-12-21 21:33:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:35,818 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-21 21:33:35,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:33:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-21 21:33:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:33:35,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:35,819 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:36,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:33:36,033 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash -953894760, now seen corresponding path program 9 times [2020-12-21 21:33:36,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:36,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856977050] [2020-12-21 21:33:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-21 21:33:36,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856977050] [2020-12-21 21:33:36,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372915309] [2020-12-21 21:33:36,173 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 21:33:36,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:33:36,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:36,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:33:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-21 21:33:37,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:37,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:33:37,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909936002] [2020-12-21 21:33:37,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:33:37,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:37,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:33:37,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:33:37,017 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2020-12-21 21:33:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:37,092 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-12-21 21:33:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:33:37,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-12-21 21:33:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:37,093 INFO L225 Difference]: With dead ends: 73 [2020-12-21 21:33:37,093 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:33:37,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:33:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:33:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-21 21:33:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:33:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-21 21:33:37,099 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2020-12-21 21:33:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:37,100 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-21 21:33:37,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:33:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-21 21:33:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:33:37,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:37,101 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:37,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:37,317 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:37,318 INFO L82 PathProgramCache]: Analyzing trace with hash -468119106, now seen corresponding path program 10 times [2020-12-21 21:33:37,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:37,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305530821] [2020-12-21 21:33:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-21 21:33:37,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305530821] [2020-12-21 21:33:37,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294972424] [2020-12-21 21:33:37,501 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 21:33:37,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:37,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:37,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:33:37,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-21 21:33:37,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:37,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:33:37,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177117291] [2020-12-21 21:33:37,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:33:37,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:33:37,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:33:37,619 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2020-12-21 21:33:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:37,703 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-12-21 21:33:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:33:37,704 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-12-21 21:33:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:37,706 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:33:37,706 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:33:37,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:33:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:33:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-21 21:33:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 21:33:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-12-21 21:33:37,721 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2020-12-21 21:33:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:37,722 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-12-21 21:33:37,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:33:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-12-21 21:33:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 21:33:37,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:37,724 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:37,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:37,937 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1291774376, now seen corresponding path program 11 times [2020-12-21 21:33:37,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:37,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116847440] [2020-12-21 21:33:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-12-21 21:33:38,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116847440] [2020-12-21 21:33:38,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716661525] [2020-12-21 21:33:38,118 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 21:33:41,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 21:33:41,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:33:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-12-21 21:33:41,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:41,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:33:41,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637700731] [2020-12-21 21:33:41,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:33:41,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:41,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:33:41,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:33:41,847 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2020-12-21 21:33:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:41,936 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-12-21 21:33:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:33:41,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-12-21 21:33:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:41,937 INFO L225 Difference]: With dead ends: 83 [2020-12-21 21:33:41,937 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:33:41,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:33:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:33:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-21 21:33:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:33:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-21 21:33:41,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2020-12-21 21:33:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:41,944 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-21 21:33:41,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:33:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-21 21:33:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:33:41,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:41,946 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:42,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:33:42,147 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash 340687742, now seen corresponding path program 12 times [2020-12-21 21:33:42,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:42,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480001248] [2020-12-21 21:33:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-21 21:33:42,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480001248] [2020-12-21 21:33:42,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587664040] [2020-12-21 21:33:42,362 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:44,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:33:44,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:33:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-21 21:33:44,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:44,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:33:44,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785894461] [2020-12-21 21:33:44,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:33:44,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:33:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:33:44,505 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2020-12-21 21:33:44,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:44,584 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-12-21 21:33:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:33:44,585 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-12-21 21:33:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:44,586 INFO L225 Difference]: With dead ends: 88 [2020-12-21 21:33:44,586 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:33:44,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:33:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:33:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-21 21:33:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 21:33:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-12-21 21:33:44,592 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2020-12-21 21:33:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:44,592 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-12-21 21:33:44,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:33:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-12-21 21:33:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:33:44,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:44,593 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:44,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:33:44,802 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:44,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1716134936, now seen corresponding path program 13 times [2020-12-21 21:33:44,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:44,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594560524] [2020-12-21 21:33:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-21 21:33:44,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594560524] [2020-12-21 21:33:44,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851248998] [2020-12-21 21:33:44,982 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:45,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:33:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-21 21:33:45,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:45,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:33:45,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723250320] [2020-12-21 21:33:45,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:33:45,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:33:45,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:33:45,147 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-12-21 21:33:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:45,249 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-12-21 21:33:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:33:45,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-12-21 21:33:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:45,250 INFO L225 Difference]: With dead ends: 93 [2020-12-21 21:33:45,250 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:33:45,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:33:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:33:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-21 21:33:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:33:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-12-21 21:33:45,256 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2020-12-21 21:33:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:45,257 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-12-21 21:33:45,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:33:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-12-21 21:33:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:33:45,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:45,258 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:45,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:33:45,470 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:45,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1136358718, now seen corresponding path program 14 times [2020-12-21 21:33:45,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:45,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455121450] [2020-12-21 21:33:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:33:45,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455121450] [2020-12-21 21:33:45,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627791801] [2020-12-21 21:33:45,666 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:45,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:45,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:45,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:33:45,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:33:45,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:45,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:33:45,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645891853] [2020-12-21 21:33:45,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:33:45,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:45,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:33:45,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:33:45,851 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 18 states. [2020-12-21 21:33:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:45,953 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-12-21 21:33:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:33:45,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-12-21 21:33:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:45,973 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:33:45,973 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:33:45,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:33:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:33:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-21 21:33:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:33:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-21 21:33:45,989 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2020-12-21 21:33:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:45,989 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-21 21:33:45,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:33:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-21 21:33:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:33:45,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:45,990 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:46,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:46,208 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:46,208 INFO L82 PathProgramCache]: Analyzing trace with hash 46129624, now seen corresponding path program 15 times [2020-12-21 21:33:46,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:46,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622076975] [2020-12-21 21:33:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-12-21 21:33:46,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622076975] [2020-12-21 21:33:46,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772009662] [2020-12-21 21:33:46,491 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:53,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:33:53,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:33:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-12-21 21:33:53,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:53,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:33:53,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878790993] [2020-12-21 21:33:53,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:33:53,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:33:53,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:33:53,841 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2020-12-21 21:33:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:53,943 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2020-12-21 21:33:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:33:53,943 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2020-12-21 21:33:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:53,944 INFO L225 Difference]: With dead ends: 103 [2020-12-21 21:33:53,944 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:33:53,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:33:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:33:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-21 21:33:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:33:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-12-21 21:33:53,950 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 56 [2020-12-21 21:33:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:53,950 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-12-21 21:33:53,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:33:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-12-21 21:33:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:33:53,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:53,951 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:54,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:33:54,152 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1778385154, now seen corresponding path program 16 times [2020-12-21 21:33:54,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:54,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341946220] [2020-12-21 21:33:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-21 21:33:54,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341946220] [2020-12-21 21:33:54,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399708359] [2020-12-21 21:33:54,405 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:54,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:54,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:33:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-21 21:33:54,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:54,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:33:54,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149270783] [2020-12-21 21:33:54,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:33:54,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:33:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:33:54,609 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 20 states. [2020-12-21 21:33:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:54,713 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-21 21:33:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:33:54,713 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-12-21 21:33:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:54,714 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:33:54,714 INFO L226 Difference]: Without dead ends: 65 [2020-12-21 21:33:54,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:33:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-21 21:33:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-21 21:33:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:33:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-12-21 21:33:54,738 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2020-12-21 21:33:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:54,738 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-12-21 21:33:54,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:33:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-12-21 21:33:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:33:54,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:54,739 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:54,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:33:54,953 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash 119689112, now seen corresponding path program 17 times [2020-12-21 21:33:54,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:54,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040890895] [2020-12-21 21:33:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-12-21 21:33:55,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040890895] [2020-12-21 21:33:55,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128228889] [2020-12-21 21:33:55,253 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true