/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:28:58,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:28:58,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:28:58,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:28:58,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:28:58,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:28:58,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:28:58,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:28:58,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:28:58,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:28:58,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:28:58,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:28:58,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:28:58,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:28:58,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:28:58,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:28:58,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:28:58,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:28:58,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:28:58,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:28:58,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:28:58,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:28:58,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:28:58,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:28:58,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:28:58,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:28:58,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:28:58,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:28:58,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:28:58,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:28:58,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:28:58,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:28:58,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:28:58,771 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:28:58,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:28:58,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:28:58,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:28:58,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:28:58,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:28:58,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:28:58,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:28:58,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:28:58,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:28:58,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:28:58,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:28:58,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:28:58,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:28:58,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:28:58,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:28:58,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:28:58,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:28:58,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:28:58,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:28:58,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:28:58,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:28:59,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:28:59,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:28:59,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:28:59,194 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:28:59,195 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:28:59,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i [2020-12-21 21:28:59,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6512c5929/36a426556b6e445c91030d6666b0a3ed/FLAG8578ab0d8 [2020-12-21 21:28:59,844 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:28:59,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i [2020-12-21 21:28:59,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6512c5929/36a426556b6e445c91030d6666b0a3ed/FLAG8578ab0d8 [2020-12-21 21:29:00,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6512c5929/36a426556b6e445c91030d6666b0a3ed [2020-12-21 21:29:00,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:29:00,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:29:00,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:29:00,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:29:00,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:29:00,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fde2d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00, skipping insertion in model container [2020-12-21 21:29:00,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:29:00,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:29:00,442 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i[823,836] [2020-12-21 21:29:00,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:29:00,468 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:29:00,484 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i[823,836] [2020-12-21 21:29:00,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:29:00,508 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:29:00,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00 WrapperNode [2020-12-21 21:29:00,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:29:00,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:29:00,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:29:00,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:29:00,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:29:00,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:29:00,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:29:00,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:29:00,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... [2020-12-21 21:29:00,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:29:00,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:29:00,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:29:00,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:29:00,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:29:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:29:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:29:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:29:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:29:00,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:29:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:29:00,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:29:00,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:29:00,984 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 21:29:00,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:00 BoogieIcfgContainer [2020-12-21 21:29:00,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:29:00,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:29:00,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:29:00,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:29:00,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:29:00" (1/3) ... [2020-12-21 21:29:00,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae692a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:00, skipping insertion in model container [2020-12-21 21:29:00,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:00" (2/3) ... [2020-12-21 21:29:00,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae692a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:00, skipping insertion in model container [2020-12-21 21:29:00,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:00" (3/3) ... [2020-12-21 21:29:00,998 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2020-12-21 21:29:01,007 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:29:01,012 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:29:01,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:29:01,113 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:29:01,114 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:29:01,114 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:29:01,114 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:29:01,114 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:29:01,114 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:29:01,115 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:29:01,115 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:29:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-21 21:29:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:29:01,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:01,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:01,162 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash -952172836, now seen corresponding path program 1 times [2020-12-21 21:29:01,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:01,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654530868] [2020-12-21 21:29:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:01,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654530868] [2020-12-21 21:29:01,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:29:01,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:29:01,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428864184] [2020-12-21 21:29:01,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:29:01,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:01,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:29:01,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:29:01,396 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-12-21 21:29:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:01,475 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2020-12-21 21:29:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:29:01,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:29:01,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:01,487 INFO L225 Difference]: With dead ends: 42 [2020-12-21 21:29:01,488 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 21:29:01,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:29:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 21:29:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-12-21 21:29:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:29:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-21 21:29:01,529 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2020-12-21 21:29:01,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:01,529 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-21 21:29:01,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:29:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-21 21:29:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:29:01,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:01,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:01,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:29:01,531 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:01,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1567052653, now seen corresponding path program 1 times [2020-12-21 21:29:01,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:01,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955653860] [2020-12-21 21:29:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:29:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955653860] [2020-12-21 21:29:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638904406] [2020-12-21 21:29:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:29:01,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:29:01,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:01,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:29:01,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203640767] [2020-12-21 21:29:01,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:29:01,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:29:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:01,776 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2020-12-21 21:29:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:01,822 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-12-21 21:29:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:29:01,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 21:29:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:01,824 INFO L225 Difference]: With dead ends: 41 [2020-12-21 21:29:01,824 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:29:01,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:29:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-21 21:29:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:29:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-21 21:29:01,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-12-21 21:29:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:01,831 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-21 21:29:01,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:29:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-21 21:29:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:29:01,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:01,833 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:02,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:29:02,050 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:02,051 INFO L82 PathProgramCache]: Analyzing trace with hash 159288628, now seen corresponding path program 2 times [2020-12-21 21:29:02,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:02,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035097213] [2020-12-21 21:29:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:29:02,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035097213] [2020-12-21 21:29:02,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225254492] [2020-12-21 21:29:02,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:02,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:02,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:29:02,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:29:02,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:02,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:29:02,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921915266] [2020-12-21 21:29:02,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:29:02,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:02,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:29:02,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:29:02,229 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-12-21 21:29:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:02,284 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-12-21 21:29:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:29:02,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 21:29:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:02,285 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:29:02,286 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 21:29:02,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:29:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 21:29:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-21 21:29:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:29:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-12-21 21:29:02,293 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-12-21 21:29:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:02,293 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-12-21 21:29:02,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:29:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-12-21 21:29:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:29:02,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:02,295 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:02,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:02,511 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:02,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:02,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2098372907, now seen corresponding path program 3 times [2020-12-21 21:29:02,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:02,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545647179] [2020-12-21 21:29:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:29:02,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545647179] [2020-12-21 21:29:02,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704828655] [2020-12-21 21:29:02,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:02,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:29:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:02,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:29:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:29:02,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:02,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:29:02,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782774882] [2020-12-21 21:29:02,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:29:02,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:29:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:02,732 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-12-21 21:29:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:02,816 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-12-21 21:29:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:29:02,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-21 21:29:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:02,818 INFO L225 Difference]: With dead ends: 59 [2020-12-21 21:29:02,818 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:29:02,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:29:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-12-21 21:29:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:29:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-12-21 21:29:02,826 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2020-12-21 21:29:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:02,826 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-12-21 21:29:02,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:29:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-12-21 21:29:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:29:02,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:02,828 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:03,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:03,042 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:03,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1609282676, now seen corresponding path program 4 times [2020-12-21 21:29:03,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:03,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52772223] [2020-12-21 21:29:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 21:29:03,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52772223] [2020-12-21 21:29:03,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168791361] [2020-12-21 21:29:03,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:03,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:03,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:03,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:29:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-21 21:29:03,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:03,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:29:03,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930855702] [2020-12-21 21:29:03,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:29:03,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:03,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:29:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:03,240 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-12-21 21:29:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:03,309 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-12-21 21:29:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:29:03,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-21 21:29:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:03,310 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:29:03,311 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 21:29:03,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 21:29:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-12-21 21:29:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:29:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-21 21:29:03,318 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2020-12-21 21:29:03,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:03,318 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-21 21:29:03,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:29:03,318 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-21 21:29:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:29:03,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:03,320 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:03,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:03,536 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:03,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1784739267, now seen corresponding path program 5 times [2020-12-21 21:29:03,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:03,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210963237] [2020-12-21 21:29:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:29:03,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210963237] [2020-12-21 21:29:03,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387357702] [2020-12-21 21:29:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:03,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:29:03,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:29:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 21:29:04,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:04,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:29:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735019553] [2020-12-21 21:29:04,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:29:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:04,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:29:04,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:29:04,054 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2020-12-21 21:29:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:04,132 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-12-21 21:29:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:29:04,132 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-12-21 21:29:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:04,136 INFO L225 Difference]: With dead ends: 77 [2020-12-21 21:29:04,136 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 21:29:04,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:29:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 21:29:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-12-21 21:29:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:29:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-21 21:29:04,156 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2020-12-21 21:29:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:04,156 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-21 21:29:04,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:29:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-21 21:29:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:29:04,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:04,160 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:04,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:29:04,374 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:04,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2008431076, now seen corresponding path program 6 times [2020-12-21 21:29:04,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:04,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298849659] [2020-12-21 21:29:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:29:04,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298849659] [2020-12-21 21:29:04,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978045728] [2020-12-21 21:29:04,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:04,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:29:04,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:29:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-21 21:29:04,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:04,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:29:04,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478905132] [2020-12-21 21:29:04,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:29:04,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:29:04,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:29:04,937 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 10 states. [2020-12-21 21:29:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:05,020 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-12-21 21:29:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:29:05,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-12-21 21:29:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:05,022 INFO L225 Difference]: With dead ends: 86 [2020-12-21 21:29:05,022 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:29:05,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:29:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:29:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-12-21 21:29:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:29:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-21 21:29:05,028 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2020-12-21 21:29:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:05,029 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-21 21:29:05,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:29:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-21 21:29:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:29:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:05,030 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:05,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:05,244 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash -700601765, now seen corresponding path program 7 times [2020-12-21 21:29:05,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:05,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149386299] [2020-12-21 21:29:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 21:29:05,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149386299] [2020-12-21 21:29:05,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058869954] [2020-12-21 21:29:05,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:05,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:29:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 21:29:05,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:05,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:29:05,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667347897] [2020-12-21 21:29:05,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:29:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:05,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:29:05,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:29:05,510 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 11 states. [2020-12-21 21:29:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:05,666 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-12-21 21:29:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:29:05,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-21 21:29:05,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:05,672 INFO L225 Difference]: With dead ends: 95 [2020-12-21 21:29:05,672 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:29:05,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:29:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:29:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-12-21 21:29:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:29:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-12-21 21:29:05,685 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2020-12-21 21:29:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:05,686 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-12-21 21:29:05,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:29:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-12-21 21:29:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:29:05,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:05,687 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:05,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:05,890 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1469732924, now seen corresponding path program 8 times [2020-12-21 21:29:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:05,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088967524] [2020-12-21 21:29:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 21:29:06,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088967524] [2020-12-21 21:29:06,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974171374] [2020-12-21 21:29:06,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:06,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:06,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:29:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 21:29:06,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:06,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:29:06,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583666921] [2020-12-21 21:29:06,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:29:06,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:29:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:29:06,248 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 12 states. [2020-12-21 21:29:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:06,353 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-12-21 21:29:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:29:06,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-12-21 21:29:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:06,355 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:29:06,355 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:29:06,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:29:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:29:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-12-21 21:29:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:29:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-21 21:29:06,362 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2020-12-21 21:29:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:06,362 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-21 21:29:06,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:29:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-21 21:29:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:29:06,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:06,363 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:06,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:29:06,578 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash 300072691, now seen corresponding path program 9 times [2020-12-21 21:29:06,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:06,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976803671] [2020-12-21 21:29:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 21:29:06,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976803671] [2020-12-21 21:29:06,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170585685] [2020-12-21 21:29:06,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:07,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:29:07,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:29:07,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 21:29:07,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:07,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:29:07,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961552522] [2020-12-21 21:29:07,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:29:07,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:07,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:29:07,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:29:07,303 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 13 states. [2020-12-21 21:29:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:07,413 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2020-12-21 21:29:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:29:07,413 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-12-21 21:29:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:07,414 INFO L225 Difference]: With dead ends: 113 [2020-12-21 21:29:07,414 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 21:29:07,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:29:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 21:29:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-12-21 21:29:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:29:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-12-21 21:29:07,421 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2020-12-21 21:29:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:07,422 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-12-21 21:29:07,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:29:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-12-21 21:29:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:29:07,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:07,423 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:07,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:07,638 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1049188716, now seen corresponding path program 10 times [2020-12-21 21:29:07,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:07,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943726277] [2020-12-21 21:29:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-21 21:29:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943726277] [2020-12-21 21:29:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538857070] [2020-12-21 21:29:07,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:07,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:07,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:07,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:29:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-21 21:29:07,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:07,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:29:07,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583451389] [2020-12-21 21:29:07,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:29:07,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:29:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:29:07,981 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2020-12-21 21:29:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:08,103 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-12-21 21:29:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:29:08,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-12-21 21:29:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:08,105 INFO L225 Difference]: With dead ends: 122 [2020-12-21 21:29:08,105 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:29:08,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:29:08,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:29:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-12-21 21:29:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 21:29:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-12-21 21:29:08,117 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2020-12-21 21:29:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:08,117 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-12-21 21:29:08,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:29:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-12-21 21:29:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 21:29:08,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:08,119 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:08,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:08,333 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:08,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1946825611, now seen corresponding path program 11 times [2020-12-21 21:29:08,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:08,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521974055] [2020-12-21 21:29:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-21 21:29:08,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521974055] [2020-12-21 21:29:08,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793931616] [2020-12-21 21:29:08,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:22,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:29:22,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:22,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:29:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-21 21:29:22,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:22,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:29:22,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132752773] [2020-12-21 21:29:22,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:29:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:29:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:29:22,671 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 15 states. [2020-12-21 21:29:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:22,795 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2020-12-21 21:29:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:29:22,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-21 21:29:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:22,796 INFO L225 Difference]: With dead ends: 131 [2020-12-21 21:29:22,797 INFO L226 Difference]: Without dead ends: 76 [2020-12-21 21:29:22,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:29:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-21 21:29:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-12-21 21:29:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:29:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-12-21 21:29:22,804 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 66 [2020-12-21 21:29:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:22,804 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-12-21 21:29:22,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:29:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-12-21 21:29:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:29:22,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:22,806 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:23,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:29:23,007 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:23,008 INFO L82 PathProgramCache]: Analyzing trace with hash -780065556, now seen corresponding path program 12 times [2020-12-21 21:29:23,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:23,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821092071] [2020-12-21 21:29:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:29:23,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821092071] [2020-12-21 21:29:23,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016769755] [2020-12-21 21:29:23,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:31,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:29:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 21:29:31,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-21 21:29:31,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:31,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:29:31,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442880373] [2020-12-21 21:29:31,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:29:31,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:31,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:29:31,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:29:31,907 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 16 states. [2020-12-21 21:29:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:32,043 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-12-21 21:29:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:29:32,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-12-21 21:29:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:32,044 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:29:32,044 INFO L226 Difference]: Without dead ends: 81 [2020-12-21 21:29:32,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:29:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-21 21:29:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-12-21 21:29:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:29:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-12-21 21:29:32,053 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2020-12-21 21:29:32,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:32,053 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-12-21 21:29:32,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:29:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-12-21 21:29:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 21:29:32,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:32,055 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:32,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:29:32,270 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:32,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2028865571, now seen corresponding path program 13 times [2020-12-21 21:29:32,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:32,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124818759] [2020-12-21 21:29:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-12-21 21:29:32,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124818759] [2020-12-21 21:29:32,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10032351] [2020-12-21 21:29:32,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:29:32,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-12-21 21:29:32,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:32,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:29:32,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63266009] [2020-12-21 21:29:32,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:29:32,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:29:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:29:32,613 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 17 states. [2020-12-21 21:29:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:32,770 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2020-12-21 21:29:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:29:32,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-21 21:29:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:32,771 INFO L225 Difference]: With dead ends: 149 [2020-12-21 21:29:32,771 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:29:32,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:29:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:29:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-12-21 21:29:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-21 21:29:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-12-21 21:29:32,778 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2020-12-21 21:29:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:32,778 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-12-21 21:29:32,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:29:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-12-21 21:29:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 21:29:32,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:32,779 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:32,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:29:32,994 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:32,995 INFO L82 PathProgramCache]: Analyzing trace with hash 510645060, now seen corresponding path program 14 times [2020-12-21 21:29:32,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:32,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602429815] [2020-12-21 21:29:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-21 21:29:33,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602429815] [2020-12-21 21:29:33,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620362207] [2020-12-21 21:29:33,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:33,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:33,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:29:33,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-21 21:29:33,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:33,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:29:33,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108956423] [2020-12-21 21:29:33,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:29:33,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:29:33,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:29:33,452 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 18 states. [2020-12-21 21:29:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:33,606 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2020-12-21 21:29:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:29:33,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-21 21:29:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:33,607 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:29:33,607 INFO L226 Difference]: Without dead ends: 91 [2020-12-21 21:29:33,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:29:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-21 21:29:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-12-21 21:29:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:29:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-12-21 21:29:33,613 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 81 [2020-12-21 21:29:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:33,614 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-12-21 21:29:33,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:29:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-12-21 21:29:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:29:33,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:33,615 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:33,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:33,829 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:33,830 INFO L82 PathProgramCache]: Analyzing trace with hash -498582341, now seen corresponding path program 15 times [2020-12-21 21:29:33,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:33,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158974701] [2020-12-21 21:29:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-12-21 21:29:34,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158974701] [2020-12-21 21:29:34,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457960059] [2020-12-21 21:29:34,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:37,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:29:37,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:29:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-12-21 21:29:37,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:37,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:29:37,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975117659] [2020-12-21 21:29:37,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:29:37,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:29:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:29:37,609 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 19 states. [2020-12-21 21:29:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:37,791 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2020-12-21 21:29:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:29:37,791 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-12-21 21:29:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:37,792 INFO L225 Difference]: With dead ends: 167 [2020-12-21 21:29:37,792 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:29:37,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:29:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:29:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-12-21 21:29:37,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 21:29:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-12-21 21:29:37,798 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2020-12-21 21:29:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:37,798 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-12-21 21:29:37,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:29:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-12-21 21:29:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:29:37,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:37,799 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:38,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:29:38,015 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1720143460, now seen corresponding path program 16 times [2020-12-21 21:29:38,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:38,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501753235] [2020-12-21 21:29:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-12-21 21:29:38,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501753235] [2020-12-21 21:29:38,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684380238] [2020-12-21 21:29:38,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:38,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:38,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:29:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-21 21:29:38,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:38,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:29:38,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221725939] [2020-12-21 21:29:38,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:29:38,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:38,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:29:38,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:29:38,466 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 20 states. [2020-12-21 21:29:38,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:38,618 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2020-12-21 21:29:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:29:38,619 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-12-21 21:29:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:38,619 INFO L225 Difference]: With dead ends: 176 [2020-12-21 21:29:38,620 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 21:29:38,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:29:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 21:29:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-12-21 21:29:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 21:29:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-12-21 21:29:38,625 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2020-12-21 21:29:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:38,626 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-12-21 21:29:38,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:29:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-12-21 21:29:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:29:38,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:38,627 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:38,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:29:38,843 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash -682438317, now seen corresponding path program 17 times [2020-12-21 21:29:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:38,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444437410] [2020-12-21 21:29:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-12-21 21:29:39,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444437410] [2020-12-21 21:29:39,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310709895] [2020-12-21 21:29:39,137 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