/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:47,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:47,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:47,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:52:47,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:52:47,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:52:47,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:52:47,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:52:47,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:52:47,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:52:47,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:52:47,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:52:47,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:52:47,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:52:47,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:52:47,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:52:47,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:52:47,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:47,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:47,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:47,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:47,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:47,647 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:47,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:47,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:47,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:47,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:47,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:47,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:47,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:47,650 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:47,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:47,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:47,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:47,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:47,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:47,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:47,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:47,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:47,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:47,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:47,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:47,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:47,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:48,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:48,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:48,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:48,109 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:48,109 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:48,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test24-2.c [2020-12-22 03:52:48,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f42861ca2/d86d78b6d621483e9eb5d7614a42d813/FLAG88fc89f8c [2020-12-22 03:52:48,892 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:48,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test24-2.c [2020-12-22 03:52:48,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f42861ca2/d86d78b6d621483e9eb5d7614a42d813/FLAG88fc89f8c [2020-12-22 03:52:49,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f42861ca2/d86d78b6d621483e9eb5d7614a42d813 [2020-12-22 03:52:49,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:49,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:49,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:49,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:49,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:49,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8540251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49, skipping insertion in model container [2020-12-22 03:52:49,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:49,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:49,444 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/ldv-regression/test24-2.c[807,820] [2020-12-22 03:52:49,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:49,458 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:49,480 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/ldv-regression/test24-2.c[807,820] [2020-12-22 03:52:49,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:49,497 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:49,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49 WrapperNode [2020-12-22 03:52:49,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:49,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:49,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:49,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:49,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:49,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:49,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:49,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:49,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:49,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:49,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:49,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:49,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:49,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:49,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:49,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:52:49,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:49,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:49,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:52:49,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:52:49,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:49,988 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 03:52:49,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:49 BoogieIcfgContainer [2020-12-22 03:52:49,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:49,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:49,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:50,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:50,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:49" (1/3) ... [2020-12-22 03:52:50,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669d236a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:50, skipping insertion in model container [2020-12-22 03:52:50,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (2/3) ... [2020-12-22 03:52:50,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669d236a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:50, skipping insertion in model container [2020-12-22 03:52:50,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:49" (3/3) ... [2020-12-22 03:52:50,021 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-12-22 03:52:50,035 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:50,040 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:52:50,073 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:52:50,110 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:50,111 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:50,111 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:50,111 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:50,111 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:50,111 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:50,112 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:50,112 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 03:52:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:52:50,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:50,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:50,137 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2020-12-22 03:52:50,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:50,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593954567] [2020-12-22 03:52:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:50,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593954567] [2020-12-22 03:52:50,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:50,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:52:50,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128201707] [2020-12-22 03:52:50,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:52:50,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:50,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:52:50,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:50,387 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 03:52:50,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:50,413 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-12-22 03:52:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:52:50,415 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 03:52:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:50,445 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:52:50,445 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 03:52:50,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 03:52:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 03:52:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 03:52:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-22 03:52:50,486 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-12-22 03:52:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:50,487 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-22 03:52:50,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:52:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-22 03:52:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:52:50,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:50,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:50,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:52:50,488 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2020-12-22 03:52:50,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:50,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970803054] [2020-12-22 03:52:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:50,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970803054] [2020-12-22 03:52:50,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:50,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:52:50,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096988686] [2020-12-22 03:52:50,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:52:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:52:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:52:50,581 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-12-22 03:52:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:50,599 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 03:52:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:52:50,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 03:52:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:50,600 INFO L225 Difference]: With dead ends: 24 [2020-12-22 03:52:50,601 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 03:52:50,602 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 [2020-12-22 03:52:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 03:52:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-22 03:52:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:52:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 03:52:50,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-22 03:52:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:50,607 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 03:52:50,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:52:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 03:52:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:52:50,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:50,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:50,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:52:50,608 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:50,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2020-12-22 03:52:50,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:50,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500424509] [2020-12-22 03:52:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:50,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500424509] [2020-12-22 03:52:50,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543521195] [2020-12-22 03:52:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:52:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:50,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:50,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:52:50,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053625252] [2020-12-22 03:52:50,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:50,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:50,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:50,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:50,833 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-12-22 03:52:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:50,859 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-22 03:52:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:52:50,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 03:52:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:50,861 INFO L225 Difference]: With dead ends: 26 [2020-12-22 03:52:50,861 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 03:52:50,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 03:52:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-22 03:52:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 03:52:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 03:52:50,869 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-12-22 03:52:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:50,870 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 03:52:50,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 03:52:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:52:50,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:50,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:51,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 03:52:51,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2020-12-22 03:52:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:51,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289976748] [2020-12-22 03:52:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:51,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289976748] [2020-12-22 03:52:51,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068595579] [2020-12-22 03:52:51,266 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 [2020-12-22 03:52:51,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:52:51,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:52:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:51,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:51,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:52:51,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698204307] [2020-12-22 03:52:51,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:52:51,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:51,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:52:51,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:52:51,436 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-22 03:52:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:51,470 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-22 03:52:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:52:51,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 03:52:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:51,472 INFO L225 Difference]: With dead ends: 28 [2020-12-22 03:52:51,472 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 03:52:51,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:52:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 03:52:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-22 03:52:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 03:52:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 03:52:51,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-12-22 03:52:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:51,478 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 03:52:51,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:52:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 03:52:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 03:52:51,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:51,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:51,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:51,694 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2020-12-22 03:52:51,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:51,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827864516] [2020-12-22 03:52:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:51,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827864516] [2020-12-22 03:52:51,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565401619] [2020-12-22 03:52:51,827 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 [2020-12-22 03:52:51,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 03:52:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:52:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:51,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:51,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:52:51,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24736921] [2020-12-22 03:52:51,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:52:51,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:52:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:52:51,969 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-12-22 03:52:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:52,000 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-22 03:52:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:52:52,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 03:52:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:52,002 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:52:52,002 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:52:52,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:52:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:52:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 03:52:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 03:52:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 03:52:52,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-12-22 03:52:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:52,008 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 03:52:52,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:52:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 03:52:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:52:52,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:52,010 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:52,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:52,224 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2020-12-22 03:52:52,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:52,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786203520] [2020-12-22 03:52:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:52,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786203520] [2020-12-22 03:52:52,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687296755] [2020-12-22 03:52:52,328 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 [2020-12-22 03:52:52,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:52:52,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 03:52:52,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:52,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:52,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 03:52:52,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588326243] [2020-12-22 03:52:52,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:52:52,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:52:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:52:52,435 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-22 03:52:52,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:52,465 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 03:52:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:52:52,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-22 03:52:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:52,466 INFO L225 Difference]: With dead ends: 32 [2020-12-22 03:52:52,466 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 03:52:52,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:52:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 03:52:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 03:52:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 03:52:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 03:52:52,472 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-12-22 03:52:52,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:52,472 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 03:52:52,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:52:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 03:52:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 03:52:52,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:52,473 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:52,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:52,688 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:52,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2020-12-22 03:52:52,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:52,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190124904] [2020-12-22 03:52:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190124904] [2020-12-22 03:52:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122255629] [2020-12-22 03:52:52,763 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 [2020-12-22 03:52:52,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 03:52:52,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 03:52:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:52,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:52,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 03:52:52,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43357008] [2020-12-22 03:52:52,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:52:52,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:52:52,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:52:52,899 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-12-22 03:52:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:52,927 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 03:52:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:52:52,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-22 03:52:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:52,928 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:52:52,929 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 03:52:52,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:52:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 03:52:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-22 03:52:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 03:52:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 03:52:52,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-12-22 03:52:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:52,934 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 03:52:52,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:52:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 03:52:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 03:52:52,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:52,935 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:53,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 03:52:53,151 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2020-12-22 03:52:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:53,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481019512] [2020-12-22 03:52:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:53,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481019512] [2020-12-22 03:52:53,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136669099] [2020-12-22 03:52:53,229 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 [2020-12-22 03:52:53,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 03:52:53,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:53,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:52:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:53,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:53,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:52:53,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009055547] [2020-12-22 03:52:53,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:52:53,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:53,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:52:53,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:53,474 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-22 03:52:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:53,510 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-22 03:52:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:52:53,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-22 03:52:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:53,512 INFO L225 Difference]: With dead ends: 36 [2020-12-22 03:52:53,512 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 03:52:53,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 03:52:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-22 03:52:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 03:52:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-22 03:52:53,517 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-12-22 03:52:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:53,517 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-22 03:52:53,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:52:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-22 03:52:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 03:52:53,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:53,519 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:53,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:53,733 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2020-12-22 03:52:53,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:53,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185687226] [2020-12-22 03:52:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:53,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185687226] [2020-12-22 03:52:53,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572632856] [2020-12-22 03:52:53,858 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 [2020-12-22 03:52:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 03:52:53,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:53,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:53,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 03:52:53,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320138908] [2020-12-22 03:52:53,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:52:53,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:53,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:52:53,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:52:53,982 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-12-22 03:52:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:54,024 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-22 03:52:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:52:54,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-22 03:52:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:54,026 INFO L225 Difference]: With dead ends: 38 [2020-12-22 03:52:54,026 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 03:52:54,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:52:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 03:52:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-22 03:52:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 03:52:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 03:52:54,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-12-22 03:52:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:54,031 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 03:52:54,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:52:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 03:52:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 03:52:54,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:54,032 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:54,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:54,247 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2020-12-22 03:52:54,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:54,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383350902] [2020-12-22 03:52:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:54,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383350902] [2020-12-22 03:52:54,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119786823] [2020-12-22 03:52:54,343 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 [2020-12-22 03:52:54,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:52:54,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:52:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:54,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:54,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:52:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69948819] [2020-12-22 03:52:54,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:52:54,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:52:54,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:52:54,462 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-12-22 03:52:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:54,505 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-22 03:52:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:52:54,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-22 03:52:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:54,506 INFO L225 Difference]: With dead ends: 40 [2020-12-22 03:52:54,506 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 03:52:54,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:52:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 03:52:54,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 03:52:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 03:52:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 03:52:54,516 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-12-22 03:52:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:54,516 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 03:52:54,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:52:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 03:52:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 03:52:54,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:54,520 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:54,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 03:52:54,721 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:54,722 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2020-12-22 03:52:54,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:54,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364044375] [2020-12-22 03:52:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364044375] [2020-12-22 03:52:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062477883] [2020-12-22 03:52:54,841 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 [2020-12-22 03:52:55,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 03:52:55,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:52:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:55,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:55,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:52:55,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145592514] [2020-12-22 03:52:55,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:52:55,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:55,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:52:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:52:55,258 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-12-22 03:52:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:55,323 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-22 03:52:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:52:55,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-12-22 03:52:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:55,331 INFO L225 Difference]: With dead ends: 42 [2020-12-22 03:52:55,331 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 03:52:55,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:52:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 03:52:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-22 03:52:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 03:52:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-22 03:52:55,338 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-12-22 03:52:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:55,338 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-22 03:52:55,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:52:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-22 03:52:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 03:52:55,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:55,342 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:55,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:55,556 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2020-12-22 03:52:55,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:55,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464859914] [2020-12-22 03:52:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:55,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464859914] [2020-12-22 03:52:55,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497454382] [2020-12-22 03:52:55,705 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 [2020-12-22 03:52:55,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:52:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 03:52:55,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:55,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:55,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 03:52:55,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829333452] [2020-12-22 03:52:55,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 03:52:55,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 03:52:55,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:52:55,828 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2020-12-22 03:52:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:55,881 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-22 03:52:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 03:52:55,882 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-12-22 03:52:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:55,882 INFO L225 Difference]: With dead ends: 44 [2020-12-22 03:52:55,882 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 03:52:55,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:52:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 03:52:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-22 03:52:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 03:52:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-22 03:52:55,887 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-12-22 03:52:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:55,888 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-22 03:52:55,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 03:52:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-22 03:52:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 03:52:55,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:55,889 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:56,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:56,104 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2020-12-22 03:52:56,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:56,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016893226] [2020-12-22 03:52:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:56,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016893226] [2020-12-22 03:52:56,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315996660] [2020-12-22 03:52:56,243 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 [2020-12-22 03:52:56,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 03:52:56,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:56,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 03:52:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:56,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:56,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 03:52:56,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126699897] [2020-12-22 03:52:56,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 03:52:56,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:56,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 03:52:56,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:52:56,608 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2020-12-22 03:52:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:56,683 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-22 03:52:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:52:56,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-22 03:52:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:56,685 INFO L225 Difference]: With dead ends: 46 [2020-12-22 03:52:56,685 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 03:52:56,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:52:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 03:52:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-22 03:52:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 03:52:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 03:52:56,690 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-12-22 03:52:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:56,690 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 03:52:56,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 03:52:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 03:52:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 03:52:56,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:56,691 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:56,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 03:52:56,904 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2020-12-22 03:52:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:56,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238026496] [2020-12-22 03:52:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:57,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238026496] [2020-12-22 03:52:57,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371649250] [2020-12-22 03:52:57,073 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 [2020-12-22 03:52:58,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 03:52:58,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 03:52:58,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:58,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:58,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 03:52:58,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713992898] [2020-12-22 03:52:58,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:52:58,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:58,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:52:58,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:52:58,715 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2020-12-22 03:52:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:58,778 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-22 03:52:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 03:52:58,779 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-12-22 03:52:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:58,781 INFO L225 Difference]: With dead ends: 48 [2020-12-22 03:52:58,781 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 03:52:58,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:52:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 03:52:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-22 03:52:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 03:52:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-22 03:52:58,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-12-22 03:52:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:58,788 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-22 03:52:58,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:52:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-22 03:52:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 03:52:58,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:58,789 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:59,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 03:52:59,001 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:59,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2020-12-22 03:52:59,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:59,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580666869] [2020-12-22 03:52:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:59,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580666869] [2020-12-22 03:52:59,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953067730] [2020-12-22 03:52:59,189 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 [2020-12-22 03:52:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 03:52:59,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:59,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:59,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 03:52:59,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533250786] [2020-12-22 03:52:59,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 03:52:59,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 03:52:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:52:59,349 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2020-12-22 03:52:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:59,412 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-22 03:52:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 03:52:59,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-12-22 03:52:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:59,414 INFO L225 Difference]: With dead ends: 50 [2020-12-22 03:52:59,415 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 03:52:59,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:52:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 03:52:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-22 03:52:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 03:52:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-22 03:52:59,438 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-12-22 03:52:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:59,438 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-22 03:52:59,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 03:52:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-22 03:52:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 03:52:59,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:59,439 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:59,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 03:52:59,649 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2020-12-22 03:52:59,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:59,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994832016] [2020-12-22 03:52:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:59,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994832016] [2020-12-22 03:52:59,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964925004] [2020-12-22 03:52:59,844 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 [2020-12-22 03:52:59,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:52:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 03:52:59,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:00,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:00,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 03:53:00,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632373885] [2020-12-22 03:53:00,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 03:53:00,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 03:53:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:53:00,008 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-12-22 03:53:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:00,079 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-22 03:53:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 03:53:00,079 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-12-22 03:53:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:00,080 INFO L225 Difference]: With dead ends: 52 [2020-12-22 03:53:00,080 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 03:53:00,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:53:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 03:53:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-22 03:53:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 03:53:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 03:53:00,085 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-12-22 03:53:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:00,085 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 03:53:00,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 03:53:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 03:53:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 03:53:00,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:00,086 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:00,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:00,300 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2020-12-22 03:53:00,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:00,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430541703] [2020-12-22 03:53:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:00,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430541703] [2020-12-22 03:53:00,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929709578] [2020-12-22 03:53:00,547 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 [2020-12-22 03:53:02,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 03:53:02,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 03:53:02,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:02,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:02,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 03:53:02,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666479547] [2020-12-22 03:53:02,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 03:53:02,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 03:53:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:53:02,681 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2020-12-22 03:53:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:02,763 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-22 03:53:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 03:53:02,764 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-12-22 03:53:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:02,765 INFO L225 Difference]: With dead ends: 54 [2020-12-22 03:53:02,765 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 03:53:02,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:53:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 03:53:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-22 03:53:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 03:53:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-22 03:53:02,769 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-12-22 03:53:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:02,769 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-22 03:53:02,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 03:53:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-22 03:53:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 03:53:02,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:02,770 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:02,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 03:53:02,984 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:02,985 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2020-12-22 03:53:02,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:02,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659380308] [2020-12-22 03:53:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:03,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659380308] [2020-12-22 03:53:03,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293356643] [2020-12-22 03:53:03,231 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 [2020-12-22 03:53:03,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:53:03,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 03:53:03,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:03,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:03,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 03:53:03,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814811772] [2020-12-22 03:53:03,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 03:53:03,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:03,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 03:53:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:53:03,434 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2020-12-22 03:53:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:03,524 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-22 03:53:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 03:53:03,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-12-22 03:53:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:03,526 INFO L225 Difference]: With dead ends: 56 [2020-12-22 03:53:03,526 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 03:53:03,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:53:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 03:53:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-22 03:53:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 03:53:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-22 03:53:03,530 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-12-22 03:53:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:03,530 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-22 03:53:03,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 03:53:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-22 03:53:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 03:53:03,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:03,532 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:03,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 03:53:03,745 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:03,746 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2020-12-22 03:53:03,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:03,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977866858] [2020-12-22 03:53:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:04,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977866858] [2020-12-22 03:53:04,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289390028] [2020-12-22 03:53:04,042 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 [2020-12-22 03:53:06,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 03:53:06,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 03:53:06,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:06,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:06,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 03:53:06,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831914613] [2020-12-22 03:53:06,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 03:53:06,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:06,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 03:53:06,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:53:06,134 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2020-12-22 03:53:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:06,213 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-22 03:53:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 03:53:06,214 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-12-22 03:53:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:06,215 INFO L225 Difference]: With dead ends: 58 [2020-12-22 03:53:06,215 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 03:53:06,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:53:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 03:53:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-22 03:53:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 03:53:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 03:53:06,219 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-12-22 03:53:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:06,219 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 03:53:06,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 03:53:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 03:53:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 03:53:06,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:06,220 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:06,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:06,431 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2020-12-22 03:53:06,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:06,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401416862] [2020-12-22 03:53:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401416862] [2020-12-22 03:53:06,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997683795] [2020-12-22 03:53:06,753 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:13,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 03:53:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:13,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 03:53:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:13,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:13,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 03:53:13,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717268206] [2020-12-22 03:53:13,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 03:53:13,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:13,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 03:53:13,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:53:13,355 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2020-12-22 03:53:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:13,427 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-22 03:53:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 03:53:13,427 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-12-22 03:53:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:13,428 INFO L225 Difference]: With dead ends: 60 [2020-12-22 03:53:13,428 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 03:53:13,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:53:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 03:53:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-22 03:53:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 03:53:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-22 03:53:13,433 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-12-22 03:53:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:13,433 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-22 03:53:13,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 03:53:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-22 03:53:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 03:53:13,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:13,434 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:13,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:13,650 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:13,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2020-12-22 03:53:13,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:13,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422509417] [2020-12-22 03:53:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:13,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422509417] [2020-12-22 03:53:13,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353455631] [2020-12-22 03:53:13,997 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:14,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 03:53:14,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:14,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:14,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 03:53:14,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897882708] [2020-12-22 03:53:14,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 03:53:14,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:14,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 03:53:14,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:53:14,187 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2020-12-22 03:53:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:14,267 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-22 03:53:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 03:53:14,268 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-12-22 03:53:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:14,269 INFO L225 Difference]: With dead ends: 61 [2020-12-22 03:53:14,269 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 03:53:14,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:53:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 03:53:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 03:53:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 03:53:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-22 03:53:14,276 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-12-22 03:53:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:14,276 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-22 03:53:14,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 03:53:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-22 03:53:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 03:53:14,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:14,277 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:14,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:14,493 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:14,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2020-12-22 03:53:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:14,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214391962] [2020-12-22 03:53:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:53:14,630 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:53:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:53:14,762 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:53:14,814 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:53:14,814 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:53:14,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 03:53:14,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:53:14 BoogieIcfgContainer [2020-12-22 03:53:14,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:53:14,928 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:53:14,928 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:53:14,928 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:53:14,929 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:49" (3/4) ... [2020-12-22 03:53:14,932 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:53:15,054 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test24-2.c-witness.graphml [2020-12-22 03:53:15,054 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:53:15,056 INFO L168 Benchmark]: Toolchain (without parser) took 25829.26 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 138.8 MB in the beginning and 146.8 MB in the end (delta: -8.0 MB). Peak memory consumption was 65.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:15,057 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:53:15,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.29 ms. Allocated memory is still 162.5 MB. Free memory was 138.7 MB in the beginning and 128.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:15,058 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.50 ms. Allocated memory is still 162.5 MB. Free memory was 128.7 MB in the beginning and 127.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:15,058 INFO L168 Benchmark]: Boogie Preprocessor took 27.38 ms. Allocated memory is still 162.5 MB. Free memory was 127.3 MB in the beginning and 126.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:15,059 INFO L168 Benchmark]: RCFGBuilder took 417.82 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 144.3 MB in the end (delta: -18.4 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:15,059 INFO L168 Benchmark]: TraceAbstraction took 24935.25 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 143.8 MB in the beginning and 151.5 MB in the end (delta: -7.7 MB). Peak memory consumption was 65.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:15,059 INFO L168 Benchmark]: Witness Printer took 126.01 ms. Allocated memory is still 234.9 MB. Free memory was 151.5 MB in the beginning and 146.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:15,062 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.29 ms. Allocated memory is still 162.5 MB. Free memory was 138.7 MB in the beginning and 128.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.50 ms. Allocated memory is still 162.5 MB. Free memory was 128.7 MB in the beginning and 127.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.38 ms. Allocated memory is still 162.5 MB. Free memory was 127.3 MB in the beginning and 126.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 417.82 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 144.3 MB in the end (delta: -18.4 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24935.25 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 143.8 MB in the beginning and 151.5 MB in the end (delta: -7.7 MB). Peak memory consumption was 65.1 MB. Max. memory is 8.0 GB. * Witness Printer took 126.01 ms. Allocated memory is still 234.9 MB. Free memory was 151.5 MB in the beginning and 146.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] COND TRUE !check(ad1, i) [L39] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.7s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 13.5s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3097 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...