/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_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:24:10,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:24:10,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:24:10,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:24:10,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:24:10,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:24:10,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:24:10,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:24:10,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:24:10,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:24:10,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:24:10,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:24:10,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:24:10,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:24:10,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:24:10,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:24:10,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:24:10,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:24:10,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:24:10,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:24:10,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:24:10,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:24:10,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:24:10,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:24:10,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:24:10,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:24:10,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:24:10,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:24:10,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:24:10,775 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:24:10,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:24:10,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:24:10,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:24:10,781 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:24:10,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:24:10,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:24:10,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:24:10,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:24:10,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:24:10,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:24:10,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:24:10,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:24:10,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:24:10,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:24:10,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:24:10,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:24:10,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:24:10,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:24:10,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:24:10,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:24:10,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:24:10,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:24:10,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:24:10,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:24:10,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:24:11,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:24:11,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:24:11,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:24:11,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:24:11,278 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:24:11,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2020-12-21 21:24:11,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a74280f9e/500023ab8b6e4d2f84be39192028ec80/FLAGc6719dd4e [2020-12-21 21:24:12,051 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:24:12,051 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2020-12-21 21:24:12,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a74280f9e/500023ab8b6e4d2f84be39192028ec80/FLAGc6719dd4e [2020-12-21 21:24:12,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a74280f9e/500023ab8b6e4d2f84be39192028ec80 [2020-12-21 21:24:12,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:24:12,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:24:12,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:24:12,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:24:12,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:24:12,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e9a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12, skipping insertion in model container [2020-12-21 21:24:12,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:24:12,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:24:12,597 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_copy3_ground-1.i[816,829] [2020-12-21 21:24:12,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:24:12,623 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:24:12,637 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_copy3_ground-1.i[816,829] [2020-12-21 21:24:12,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:24:12,663 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:24:12,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12 WrapperNode [2020-12-21 21:24:12,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:24:12,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:24:12,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:24:12,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:24:12,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:24:12,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:24:12,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:24:12,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:24:12,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (1/1) ... [2020-12-21 21:24:12,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:24:12,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:24:12,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:24:12,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:24:12,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (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 21:24:12,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:24:12,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:24:12,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:24:12,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:24:12,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:24:12,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:24:12,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:24:13,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:24:13,214 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-21 21:24:13,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:24:13 BoogieIcfgContainer [2020-12-21 21:24:13,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:24:13,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:24:13,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:24:13,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:24:13,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:24:12" (1/3) ... [2020-12-21 21:24:13,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b9809f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:24:13, skipping insertion in model container [2020-12-21 21:24:13,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:24:12" (2/3) ... [2020-12-21 21:24:13,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b9809f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:24:13, skipping insertion in model container [2020-12-21 21:24:13,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:24:13" (3/3) ... [2020-12-21 21:24:13,227 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2020-12-21 21:24:13,234 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:24:13,240 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:24:13,262 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:24:13,309 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:24:13,309 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:24:13,309 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:24:13,310 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:24:13,310 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:24:13,310 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:24:13,310 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:24:13,310 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:24:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-21 21:24:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:24:13,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:13,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:13,337 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:13,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2053894623, now seen corresponding path program 1 times [2020-12-21 21:24:13,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:13,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39262837] [2020-12-21 21:24:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:13,654 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 21:24:13,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39262837] [2020-12-21 21:24:13,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:24:13,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:24:13,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138631926] [2020-12-21 21:24:13,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:24:13,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:24:13,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:24:13,688 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-21 21:24:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:13,749 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2020-12-21 21:24:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:24:13,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-21 21:24:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:13,777 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:24:13,778 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 21:24:13,785 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 21:24:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 21:24:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-21 21:24:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 21:24:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-21 21:24:13,831 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-12-21 21:24:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:13,831 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-21 21:24:13,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:24:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-21 21:24:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 21:24:13,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:13,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:13,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:24:13,835 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash -418223009, now seen corresponding path program 1 times [2020-12-21 21:24:13,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:13,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335740219] [2020-12-21 21:24:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:24:13,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335740219] [2020-12-21 21:24:13,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490957282] [2020-12-21 21:24:13,944 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 21:24:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:14,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:24:14,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:24:14,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:24:14,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:24:14,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161345714] [2020-12-21 21:24:14,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:24:14,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:14,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:24:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:14,101 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-12-21 21:24:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:14,153 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-12-21 21:24:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:24:14,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-12-21 21:24:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:14,155 INFO L225 Difference]: With dead ends: 40 [2020-12-21 21:24:14,155 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:24:14,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:24:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-21 21:24:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:24:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-21 21:24:14,162 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-12-21 21:24:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:14,162 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-21 21:24:14,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:24:14,162 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-21 21:24:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:24:14,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:14,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:14,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:24:14,378 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash 241580185, now seen corresponding path program 1 times [2020-12-21 21:24:14,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:14,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064988514] [2020-12-21 21:24:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:24:14,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064988514] [2020-12-21 21:24:14,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971026455] [2020-12-21 21:24:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:24:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:24:14,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:14,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:24:14,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482640074] [2020-12-21 21:24:14,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:24:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:24:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:14,617 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-12-21 21:24:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:14,647 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-21 21:24:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:24:14,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-21 21:24:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:14,649 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:24:14,649 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:24:14,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 21:24:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:24:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-21 21:24:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:24:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-12-21 21:24:14,655 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2020-12-21 21:24:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:14,656 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-12-21 21:24:14,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:24:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-12-21 21:24:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:24:14,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:14,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:14,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:14,872 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash 456751319, now seen corresponding path program 2 times [2020-12-21 21:24:14,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:14,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776662703] [2020-12-21 21:24:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:24:14,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776662703] [2020-12-21 21:24:14,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209541452] [2020-12-21 21:24:14,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:15,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:15,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:24:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:24:15,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:15,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:24:15,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455774045] [2020-12-21 21:24:15,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:24:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:24:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:24:15,087 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-12-21 21:24:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:15,172 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-12-21 21:24:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:24:15,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-21 21:24:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:15,175 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:24:15,175 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:24:15,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 21:24:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:24:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-21 21:24:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:24:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-21 21:24:15,182 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-12-21 21:24:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:15,183 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-21 21:24:15,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:24:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-21 21:24:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:24:15,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:15,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:15,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:15,400 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1993618671, now seen corresponding path program 3 times [2020-12-21 21:24:15,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:15,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974109313] [2020-12-21 21:24:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:24:15,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974109313] [2020-12-21 21:24:15,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503830454] [2020-12-21 21:24:15,550 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 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 21:24:15,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:24:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:15,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:24:15,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:24:15,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:15,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:24:15,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341533347] [2020-12-21 21:24:15,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:24:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:24:15,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:24:15,699 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-12-21 21:24:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:15,730 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-12-21 21:24:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:24:15,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-21 21:24:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:15,732 INFO L225 Difference]: With dead ends: 60 [2020-12-21 21:24:15,732 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:24:15,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 21:24:15,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:24:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 21:24:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:24:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-21 21:24:15,738 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2020-12-21 21:24:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:15,738 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-21 21:24:15,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:24:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-21 21:24:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:24:15,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:15,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:15,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:15,956 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash 391245135, now seen corresponding path program 4 times [2020-12-21 21:24:15,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:15,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898514625] [2020-12-21 21:24:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:24:16,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898514625] [2020-12-21 21:24:16,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782289368] [2020-12-21 21:24:16,083 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 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 21:24:16,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:24:16,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:24:16,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:16,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:24:16,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908935889] [2020-12-21 21:24:16,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:24:16,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:24:16,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:24:16,249 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-12-21 21:24:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:16,285 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-12-21 21:24:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:24:16,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-21 21:24:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:16,286 INFO L225 Difference]: With dead ends: 62 [2020-12-21 21:24:16,287 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:24:16,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 21:24:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:24:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-21 21:24:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:24:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-12-21 21:24:16,293 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2020-12-21 21:24:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:16,293 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-12-21 21:24:16,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:24:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-12-21 21:24:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:24:16,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:16,294 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:16,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:24:16,510 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173363, now seen corresponding path program 5 times [2020-12-21 21:24:16,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:16,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354052977] [2020-12-21 21:24:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:24:16,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354052977] [2020-12-21 21:24:16,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99059962] [2020-12-21 21:24:16,595 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 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 21:24:16,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-21 21:24:16,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:16,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:24:16,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:24:16,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:16,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-21 21:24:16,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109977515] [2020-12-21 21:24:16,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:24:16,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:24:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:24:16,927 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2020-12-21 21:24:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:17,071 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-12-21 21:24:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:24:17,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-21 21:24:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:17,075 INFO L225 Difference]: With dead ends: 73 [2020-12-21 21:24:17,075 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 21:24:17,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:24:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 21:24:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-12-21 21:24:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:24:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-21 21:24:17,088 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2020-12-21 21:24:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:17,089 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-21 21:24:17,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:24:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-21 21:24:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:24:17,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:17,090 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:17,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:17,307 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash -91572603, now seen corresponding path program 6 times [2020-12-21 21:24:17,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:17,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37387194] [2020-12-21 21:24:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 21:24:17,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37387194] [2020-12-21 21:24:17,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328023704] [2020-12-21 21:24:17,412 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 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 21:24:17,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-21 21:24:17,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:17,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:24:17,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-21 21:24:17,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:17,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:24:17,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302276480] [2020-12-21 21:24:17,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:24:17,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:24:17,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:17,645 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 12 states. [2020-12-21 21:24:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:17,773 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-12-21 21:24:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:24:17,774 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-21 21:24:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:17,774 INFO L225 Difference]: With dead ends: 87 [2020-12-21 21:24:17,775 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:24:17,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:24:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:24:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-12-21 21:24:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:24:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-12-21 21:24:17,782 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2020-12-21 21:24:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:17,782 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-12-21 21:24:17,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:24:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-12-21 21:24:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:24:17,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:17,784 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:17,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:17,999 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash -673424131, now seen corresponding path program 7 times [2020-12-21 21:24:18,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:18,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774553364] [2020-12-21 21:24:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:24:18,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774553364] [2020-12-21 21:24:18,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846743034] [2020-12-21 21:24:18,093 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 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 21:24:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:24:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:24:18,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:18,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:24:18,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739504943] [2020-12-21 21:24:18,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:24:18,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:24:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:24:18,264 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 10 states. [2020-12-21 21:24:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:18,298 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-12-21 21:24:18,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:24:18,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-12-21 21:24:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:18,299 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:24:18,299 INFO L226 Difference]: Without dead ends: 55 [2020-12-21 21:24:18,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 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 21:24:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-21 21:24:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-21 21:24:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:24:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-21 21:24:18,306 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 49 [2020-12-21 21:24:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:18,306 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-21 21:24:18,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:24:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-21 21:24:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:24:18,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:18,308 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:18,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:24:18,516 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash 883487803, now seen corresponding path program 8 times [2020-12-21 21:24:18,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:18,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305665727] [2020-12-21 21:24:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:24:18,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305665727] [2020-12-21 21:24:18,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495821533] [2020-12-21 21:24:18,630 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 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 21:24:18,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:24:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:24:18,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:18,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:24:18,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961909092] [2020-12-21 21:24:18,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:24:18,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:18,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:24:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:24:18,844 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2020-12-21 21:24:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:18,884 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-12-21 21:24:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:24:18,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-12-21 21:24:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:18,889 INFO L225 Difference]: With dead ends: 94 [2020-12-21 21:24:18,889 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:24:18,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 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 21:24:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:24:18,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-21 21:24:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:24:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-21 21:24:18,898 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 51 [2020-12-21 21:24:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:18,898 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-21 21:24:18,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:24:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-21 21:24:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:24:18,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:18,900 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:19,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:19,110 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:19,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:19,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1867729927, now seen corresponding path program 9 times [2020-12-21 21:24:19,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:19,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143388402] [2020-12-21 21:24:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:24:19,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143388402] [2020-12-21 21:24:19,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539964935] [2020-12-21 21:24:19,221 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 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 21:24:19,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:24:19,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:19,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:24:19,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-21 21:24:19,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:19,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-12-21 21:24:19,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657135594] [2020-12-21 21:24:19,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:24:19,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:24:19,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:24:19,502 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 16 states. [2020-12-21 21:24:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:19,640 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-12-21 21:24:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:24:19,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-12-21 21:24:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:19,641 INFO L225 Difference]: With dead ends: 105 [2020-12-21 21:24:19,642 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:24:19,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:24:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:24:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-12-21 21:24:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:24:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-21 21:24:19,667 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 53 [2020-12-21 21:24:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:19,668 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-21 21:24:19,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:24:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-21 21:24:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:24:19,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:19,671 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:19,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:19,888 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash -179501455, now seen corresponding path program 10 times [2020-12-21 21:24:19,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:19,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810883835] [2020-12-21 21:24:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 21:24:20,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810883835] [2020-12-21 21:24:20,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234583902] [2020-12-21 21:24:20,032 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 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 21:24:20,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:20,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:20,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:24:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 21:24:20,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:20,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:24:20,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944571806] [2020-12-21 21:24:20,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:24:20,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:24:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:24:20,206 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 13 states. [2020-12-21 21:24:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:20,255 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-21 21:24:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:24:20,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-12-21 21:24:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:20,256 INFO L225 Difference]: With dead ends: 110 [2020-12-21 21:24:20,256 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 21:24:20,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 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 21:24:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 21:24:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-12-21 21:24:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:24:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-12-21 21:24:20,277 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 61 [2020-12-21 21:24:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:20,277 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-12-21 21:24:20,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:24:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-12-21 21:24:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:24:20,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:20,282 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:20,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:24:20,498 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:20,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1934970705, now seen corresponding path program 11 times [2020-12-21 21:24:20,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:20,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824849374] [2020-12-21 21:24:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 21:24:20,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824849374] [2020-12-21 21:24:20,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546563805] [2020-12-21 21:24:20,673 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 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 21:24:28,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:24:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:24:28,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-21 21:24:28,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:28,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-12-21 21:24:28,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441368355] [2020-12-21 21:24:28,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:24:28,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:24:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:24:28,360 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 19 states. [2020-12-21 21:24:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:28,524 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-12-21 21:24:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:24:28,525 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-12-21 21:24:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:28,526 INFO L225 Difference]: With dead ends: 121 [2020-12-21 21:24:28,526 INFO L226 Difference]: Without dead ends: 78 [2020-12-21 21:24:28,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:24:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-21 21:24:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-12-21 21:24:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:24:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-21 21:24:28,537 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2020-12-21 21:24:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:28,539 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-21 21:24:28,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:24:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-21 21:24:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:24:28,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:28,542 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:28,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:24:28,757 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:28,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1964985639, now seen corresponding path program 12 times [2020-12-21 21:24:28,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:28,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258668562] [2020-12-21 21:24:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:24:28,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258668562] [2020-12-21 21:24:28,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781384732] [2020-12-21 21:24:28,971 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 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 21:24:30,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-21 21:24:30,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:30,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:24:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:24:30,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:30,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:24:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263684136] [2020-12-21 21:24:30,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:24:30,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:24:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:24:30,416 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 15 states. [2020-12-21 21:24:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:30,467 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-12-21 21:24:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:24:30,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-12-21 21:24:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:30,469 INFO L225 Difference]: With dead ends: 126 [2020-12-21 21:24:30,469 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:24:30,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:24:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:24:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-21 21:24:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 21:24:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-21 21:24:30,474 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2020-12-21 21:24:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:30,474 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-21 21:24:30,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:24:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-21 21:24:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:24:30,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:30,476 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:30,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:24:30,690 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:30,691 INFO L82 PathProgramCache]: Analyzing trace with hash 710132197, now seen corresponding path program 13 times [2020-12-21 21:24:30,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:30,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935602799] [2020-12-21 21:24:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:24:30,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935602799] [2020-12-21 21:24:30,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511456343] [2020-12-21 21:24:30,913 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 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 21:24:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:24:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:24:31,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:31,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:24:31,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504602170] [2020-12-21 21:24:31,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:24:31,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:31,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:24:31,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:24:31,087 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2020-12-21 21:24:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:31,140 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-12-21 21:24:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:24:31,140 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-12-21 21:24:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:31,141 INFO L225 Difference]: With dead ends: 128 [2020-12-21 21:24:31,141 INFO L226 Difference]: Without dead ends: 79 [2020-12-21 21:24:31,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 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 21:24:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-21 21:24:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-21 21:24:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-21 21:24:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-21 21:24:31,146 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 73 [2020-12-21 21:24:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:31,146 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-21 21:24:31,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:24:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-21 21:24:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:24:31,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:31,147 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:31,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:31,363 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1681784611, now seen corresponding path program 14 times [2020-12-21 21:24:31,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:31,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641516636] [2020-12-21 21:24:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:24:31,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641516636] [2020-12-21 21:24:31,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337928305] [2020-12-21 21:24:31,537 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 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 21:24:31,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:31,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:31,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:24:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:24:31,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:31,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:24:31,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184457447] [2020-12-21 21:24:31,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:24:31,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:24:31,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:24:31,721 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-12-21 21:24:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:31,772 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-12-21 21:24:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:24:31,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-12-21 21:24:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:31,774 INFO L225 Difference]: With dead ends: 130 [2020-12-21 21:24:31,774 INFO L226 Difference]: Without dead ends: 81 [2020-12-21 21:24:31,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 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 21:24:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-21 21:24:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-21 21:24:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:24:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-21 21:24:31,781 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 75 [2020-12-21 21:24:31,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:31,781 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-21 21:24:31,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:24:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-21 21:24:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:24:31,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:31,782 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:31,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:24:31,989 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash -863116063, now seen corresponding path program 15 times [2020-12-21 21:24:31,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:31,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243915990] [2020-12-21 21:24:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:24:32,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243915990] [2020-12-21 21:24:32,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356058461] [2020-12-21 21:24:32,205 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 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 21:24:32,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:24:32,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:32,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:24:32,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-12-21 21:24:32,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:32,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-12-21 21:24:32,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974284505] [2020-12-21 21:24:32,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:24:32,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:24:32,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:24:32,925 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 24 states. [2020-12-21 21:24:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:33,120 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2020-12-21 21:24:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:24:33,121 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-12-21 21:24:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:33,122 INFO L225 Difference]: With dead ends: 141 [2020-12-21 21:24:33,122 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 21:24:33,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:24:33,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 21:24:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-12-21 21:24:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 21:24:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-12-21 21:24:33,127 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 77 [2020-12-21 21:24:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:33,127 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-12-21 21:24:33,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:24:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-12-21 21:24:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:24:33,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:33,128 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:33,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:24:33,340 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:33,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1641705639, now seen corresponding path program 16 times [2020-12-21 21:24:33,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:33,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25355919] [2020-12-21 21:24:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:24:33,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25355919] [2020-12-21 21:24:33,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333742001] [2020-12-21 21:24:33,573 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:33,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:33,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:24:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:24:33,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:33,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:24:33,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842516439] [2020-12-21 21:24:33,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:24:33,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:24:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:24:33,828 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2020-12-21 21:24:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:33,895 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-12-21 21:24:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:24:33,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-12-21 21:24:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:33,896 INFO L225 Difference]: With dead ends: 146 [2020-12-21 21:24:33,896 INFO L226 Difference]: Without dead ends: 91 [2020-12-21 21:24:33,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 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 21:24:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-21 21:24:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-21 21:24:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:24:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-21 21:24:33,901 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 85 [2020-12-21 21:24:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:33,901 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-21 21:24:33,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:24:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-21 21:24:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-21 21:24:33,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:33,902 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:34,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:24:34,116 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1163386775, now seen corresponding path program 17 times [2020-12-21 21:24:34,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:34,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309072317] [2020-12-21 21:24:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:24:34,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309072317] [2020-12-21 21:24:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226482483] [2020-12-21 21:24:34,349 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:26:48,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-21 21:26:48,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:26:48,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:26:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:26:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-12-21 21:26:48,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:26:48,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2020-12-21 21:26:48,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187594857] [2020-12-21 21:26:48,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:26:48,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:26:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:26:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:26:48,595 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 27 states. [2020-12-21 21:26:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:26:48,844 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2020-12-21 21:26:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:26:48,844 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 87 [2020-12-21 21:26:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:26:48,845 INFO L225 Difference]: With dead ends: 157 [2020-12-21 21:26:48,846 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 21:26:48,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:26:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 21:26:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-12-21 21:26:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:26:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-12-21 21:26:48,851 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 87 [2020-12-21 21:26:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:26:48,851 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-12-21 21:26:48,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:26:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-12-21 21:26:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 21:26:48,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:26:48,852 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:26:49,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:26:49,054 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:26:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:26:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1568287729, now seen corresponding path program 18 times [2020-12-21 21:26:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:26:49,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103159460] [2020-12-21 21:26:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:26:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:26:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-12-21 21:26:49,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103159460] [2020-12-21 21:26:49,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104559206] [2020-12-21 21:26:49,359 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:26:55,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 21:26:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:26:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:26:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:26:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-12-21 21:26:56,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:26:56,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2020-12-21 21:26:56,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253957304] [2020-12-21 21:26:56,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:26:56,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:26:56,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:26:56,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:26:56,078 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 29 states. [2020-12-21 21:26:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:26:56,337 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2020-12-21 21:26:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:26:56,337 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-12-21 21:26:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:26:56,340 INFO L225 Difference]: With dead ends: 171 [2020-12-21 21:26:56,340 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:26:56,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:26:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:26:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-12-21 21:26:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 21:26:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-12-21 21:26:56,345 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 95 [2020-12-21 21:26:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:26:56,346 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-12-21 21:26:56,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:26:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-12-21 21:26:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-21 21:26:56,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:26:56,347 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:26:56,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:26:56,548 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:26:56,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:26:56,549 INFO L82 PathProgramCache]: Analyzing trace with hash -580046713, now seen corresponding path program 19 times [2020-12-21 21:26:56,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:26:56,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74902509] [2020-12-21 21:26:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:26:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:26:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:26:56,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74902509] [2020-12-21 21:26:56,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684387637] [2020-12-21 21:26:56,856 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:26:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:26:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:26:56,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:26:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:26:57,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:26:57,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:26:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678553407] [2020-12-21 21:26:57,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:26:57,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:26:57,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:26:57,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:26:57,067 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 22 states. [2020-12-21 21:26:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:26:57,142 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2020-12-21 21:26:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:26:57,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-12-21 21:26:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:26:57,146 INFO L225 Difference]: With dead ends: 176 [2020-12-21 21:26:57,146 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 21:26:57,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:26:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 21:26:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-12-21 21:26:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 21:26:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-21 21:26:57,151 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2020-12-21 21:26:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:26:57,151 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-21 21:26:57,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:26:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-21 21:26:57,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 21:26:57,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:26:57,153 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:26:57,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:26:57,368 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:26:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:26:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash -370201275, now seen corresponding path program 20 times [2020-12-21 21:26:57,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:26:57,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250360896] [2020-12-21 21:26:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:26:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:26:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:26:57,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250360896] [2020-12-21 21:26:57,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971831892] [2020-12-21 21:26:57,690 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:26:57,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:26:57,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:26:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:26:57,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:26:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:26:57,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:26:57,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:26:57,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488877689] [2020-12-21 21:26:57,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:26:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:26:57,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:26:57,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:26:57,902 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 23 states. [2020-12-21 21:26:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:26:57,980 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2020-12-21 21:26:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:26:57,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-12-21 21:26:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:26:57,981 INFO L225 Difference]: With dead ends: 178 [2020-12-21 21:26:57,981 INFO L226 Difference]: Without dead ends: 111 [2020-12-21 21:26:57,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:26:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-21 21:26:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-12-21 21:26:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-21 21:26:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-12-21 21:26:57,986 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 105 [2020-12-21 21:26:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:26:57,986 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-12-21 21:26:57,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:26:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-12-21 21:26:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-21 21:26:57,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:26:57,988 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:26:58,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:26:58,201 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:26:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:26:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash -572198269, now seen corresponding path program 21 times [2020-12-21 21:26:58,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:26:58,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360787733] [2020-12-21 21:26:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:26:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:26:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:26:58,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360787733] [2020-12-21 21:26:58,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456178388] [2020-12-21 21:26:58,522 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:27:00,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:27:00,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:27:00,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:27:00,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:27:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2020-12-21 21:27:01,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:27:01,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-21 21:27:01,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137720153] [2020-12-21 21:27:01,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:27:01,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:27:01,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:27:01,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:27:01,090 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 33 states. [2020-12-21 21:27:01,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:27:01,406 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-12-21 21:27:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:27:01,407 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 107 [2020-12-21 21:27:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:27:01,408 INFO L225 Difference]: With dead ends: 189 [2020-12-21 21:27:01,408 INFO L226 Difference]: Without dead ends: 122 [2020-12-21 21:27:01,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:27:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-21 21:27:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2020-12-21 21:27:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-21 21:27:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-12-21 21:27:01,413 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 107 [2020-12-21 21:27:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:27:01,413 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-12-21 21:27:01,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:27:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-12-21 21:27:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-21 21:27:01,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:27:01,414 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:27:01,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:27:01,618 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:27:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:27:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1980105989, now seen corresponding path program 22 times [2020-12-21 21:27:01,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:27:01,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89004773] [2020-12-21 21:27:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:27:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:27:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-21 21:27:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89004773] [2020-12-21 21:27:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036514883] [2020-12-21 21:27:01,989 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:27:02,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:27:02,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:27:02,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:27:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:27:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-21 21:27:02,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:27:02,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:27:02,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103425139] [2020-12-21 21:27:02,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:27:02,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:27:02,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:27:02,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:27:02,210 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 25 states. [2020-12-21 21:27:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:27:02,280 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2020-12-21 21:27:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:27:02,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-12-21 21:27:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:27:02,282 INFO L225 Difference]: With dead ends: 194 [2020-12-21 21:27:02,282 INFO L226 Difference]: Without dead ends: 121 [2020-12-21 21:27:02,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:27:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-21 21:27:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-21 21:27:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-21 21:27:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-12-21 21:27:02,287 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 115 [2020-12-21 21:27:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:27:02,288 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-12-21 21:27:02,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:27:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-12-21 21:27:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-21 21:27:02,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:27:02,289 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:27:02,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:27:02,503 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:27:02,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:27:02,504 INFO L82 PathProgramCache]: Analyzing trace with hash -593442119, now seen corresponding path program 23 times [2020-12-21 21:27:02,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:27:02,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232057842] [2020-12-21 21:27:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:27:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:27:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-21 21:27:02,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232057842] [2020-12-21 21:27:02,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204168669] [2020-12-21 21:27:02,892 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true