/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-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:10:19,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:10:19,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:10:19,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:10:19,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:10:19,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:10:19,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:10:19,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:10:19,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:10:19,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:10:19,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:10:19,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:10:19,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:10:19,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:10:19,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:10:19,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:10:19,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:10:19,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:10:19,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:10:19,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:10:19,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:10:19,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:10:19,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:10:19,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:10:19,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:10:19,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:10:19,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:10:19,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:10:19,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:10:19,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:10:19,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:10:19,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:10:20,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:10:20,001 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:10:20,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:10:20,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:10:20,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:10:20,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:10:20,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:10:20,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:10:20,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:10:20,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:10:20,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:10:20,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:10:20,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:10:20,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:10:20,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:20,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:10:20,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:10:20,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:10:20,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:10:20,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:10:20,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:10:20,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:10:20,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:10:20,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:10:20,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:10:20,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:10:20,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:10:20,527 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:10:20,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome2-1.i [2020-12-21 22:10:20,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34594fcb6/42d465bb2e5a4aa5929c5fcec069c4fc/FLAGc1ec60890 [2020-12-21 22:10:21,403 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:10:21,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome2-1.i [2020-12-21 22:10:21,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34594fcb6/42d465bb2e5a4aa5929c5fcec069c4fc/FLAGc1ec60890 [2020-12-21 22:10:21,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34594fcb6/42d465bb2e5a4aa5929c5fcec069c4fc [2020-12-21 22:10:21,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:10:21,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:10:21,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:21,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:10:21,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:10:21,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:21,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a6c6c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21, skipping insertion in model container [2020-12-21 22:10:21,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:21,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:10:21,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:10:21,916 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-programs/copysome2-1.i[804,817] [2020-12-21 22:10:21,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:21,945 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:10:21,961 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-programs/copysome2-1.i[804,817] [2020-12-21 22:10:21,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:21,991 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:10:21,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21 WrapperNode [2020-12-21 22:10:21,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:21,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:21,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:10:21,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:10:22,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:22,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:10:22,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:10:22,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:10:22,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (1/1) ... [2020-12-21 22:10:22,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:10:22,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:10:22,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:10:22,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:10:22,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (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 22:10:22,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:10:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:10:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:10:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:10:22,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:10:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:10:22,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:10:22,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:10:22,479 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:10:22,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:22 BoogieIcfgContainer [2020-12-21 22:10:22,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:10:22,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:10:22,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:10:22,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:10:22,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:21" (1/3) ... [2020-12-21 22:10:22,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50604542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:22, skipping insertion in model container [2020-12-21 22:10:22,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:21" (2/3) ... [2020-12-21 22:10:22,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50604542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:22, skipping insertion in model container [2020-12-21 22:10:22,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:22" (3/3) ... [2020-12-21 22:10:22,491 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2020-12-21 22:10:22,499 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:10:22,511 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:10:22,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:10:22,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:10:22,743 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:10:22,743 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:10:22,743 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:10:22,743 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:10:22,743 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:10:22,744 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:10:22,744 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:10:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-21 22:10:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:10:22,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:22,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:22,792 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2020-12-21 22:10:22,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:22,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625304781] [2020-12-21 22:10:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:23,121 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 22:10:23,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625304781] [2020-12-21 22:10:23,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:23,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:10:23,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796046929] [2020-12-21 22:10:23,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:10:23,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:23,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:10:23,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:23,160 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-21 22:10:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:23,195 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-21 22:10:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:10:23,197 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:10:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:23,226 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:10:23,227 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 22:10:23,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 22:10:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-21 22:10:23,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:10:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-21 22:10:23,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2020-12-21 22:10:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:23,285 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-21 22:10:23,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:10:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-21 22:10:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:10:23,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:23,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:23,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:10:23,290 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -631716997, now seen corresponding path program 1 times [2020-12-21 22:10:23,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:23,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947493118] [2020-12-21 22:10:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:23,433 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 22:10:23,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947493118] [2020-12-21 22:10:23,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:23,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:10:23,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622270386] [2020-12-21 22:10:23,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:10:23,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:23,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:10:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:10:23,440 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-21 22:10:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:23,556 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-12-21 22:10:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:10:23,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 22:10:23,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:23,560 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:10:23,560 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:10:23,563 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 22:10:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:10:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-21 22:10:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 22:10:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-21 22:10:23,577 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2020-12-21 22:10:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:23,577 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-21 22:10:23,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:10:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-21 22:10:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:10:23,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:23,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:23,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:10:23,580 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2020-12-21 22:10:23,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:23,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620490874] [2020-12-21 22:10:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 22:10:23,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620490874] [2020-12-21 22:10:23,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577879821] [2020-12-21 22:10:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:10:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 22:10:23,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:23,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 22:10:23,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583280491] [2020-12-21 22:10:23,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:10:23,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:23,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:10:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:10:23,916 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2020-12-21 22:10:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:24,072 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-12-21 22:10:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:24,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-21 22:10:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:24,080 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:10:24,081 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:10:24,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 22:10:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:10:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-12-21 22:10:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:10:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-21 22:10:24,101 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2020-12-21 22:10:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:24,101 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-21 22:10:24,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:10:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-21 22:10:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:10:24,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:24,104 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:24,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:10:24,319 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:24,320 INFO L82 PathProgramCache]: Analyzing trace with hash -890123177, now seen corresponding path program 2 times [2020-12-21 22:10:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:24,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285316600] [2020-12-21 22:10:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 22:10:24,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285316600] [2020-12-21 22:10:24,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:24,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:10:24,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8169656] [2020-12-21 22:10:24,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:10:24,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:24,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:10:24,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:24,472 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-12-21 22:10:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:24,527 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-12-21 22:10:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:24,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-21 22:10:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:24,529 INFO L225 Difference]: With dead ends: 50 [2020-12-21 22:10:24,529 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 22:10:24,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 22:10:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-21 22:10:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:10:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-21 22:10:24,536 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 27 [2020-12-21 22:10:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:24,537 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-21 22:10:24,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:10:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-21 22:10:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:10:24,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:24,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:24,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 22:10:24,539 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash -497096167, now seen corresponding path program 1 times [2020-12-21 22:10:24,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:24,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246918793] [2020-12-21 22:10:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:10:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246918793] [2020-12-21 22:10:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262984146] [2020-12-21 22:10:24,683 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 22:10:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 22:10:24,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:24,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:10:24,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037592961] [2020-12-21 22:10:24,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:10:24,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:24,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:10:24,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:10:24,900 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2020-12-21 22:10:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:25,073 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-12-21 22:10:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:10:25,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-21 22:10:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:25,075 INFO L225 Difference]: With dead ends: 66 [2020-12-21 22:10:25,075 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 22:10:25,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 22:10:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-12-21 22:10:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:10:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-21 22:10:25,084 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 27 [2020-12-21 22:10:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:25,085 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-21 22:10:25,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:10:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-21 22:10:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:10:25,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:25,087 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:25,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:25,302 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1104364036, now seen corresponding path program 1 times [2020-12-21 22:10:25,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:25,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997556890] [2020-12-21 22:10:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 22:10:25,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997556890] [2020-12-21 22:10:25,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577307806] [2020-12-21 22:10:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:10:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:10:25,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 22:10:25,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:25,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 22:10:25,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537974981] [2020-12-21 22:10:25,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:10:25,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:25,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:10:25,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:25,537 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-12-21 22:10:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:25,663 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-12-21 22:10:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:10:25,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 22:10:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:25,665 INFO L225 Difference]: With dead ends: 82 [2020-12-21 22:10:25,665 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 22:10:25,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 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 22:10:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 22:10:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-12-21 22:10:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:10:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-21 22:10:25,673 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 35 [2020-12-21 22:10:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:25,673 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-21 22:10:25,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:10:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-21 22:10:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 22:10:25,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:25,675 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:25,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:25,889 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 989483061, now seen corresponding path program 2 times [2020-12-21 22:10:25,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:25,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880674040] [2020-12-21 22:10:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 22:10:25,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880674040] [2020-12-21 22:10:25,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974171374] [2020-12-21 22:10:25,982 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 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 22:10:26,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:26,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-21 22:10:26,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:26,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-12-21 22:10:26,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911861910] [2020-12-21 22:10:26,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:10:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:26,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:10:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:26,190 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-12-21 22:10:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:26,443 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2020-12-21 22:10:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:10:26,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-12-21 22:10:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:26,450 INFO L225 Difference]: With dead ends: 110 [2020-12-21 22:10:26,450 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:10:26,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:10:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-21 22:10:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 22:10:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-12-21 22:10:26,480 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 43 [2020-12-21 22:10:26,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:26,480 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-12-21 22:10:26,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:10:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-12-21 22:10:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 22:10:26,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:26,484 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:26,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:26,703 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash -699697486, now seen corresponding path program 3 times [2020-12-21 22:10:26,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:26,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100685753] [2020-12-21 22:10:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 22:10:26,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100685753] [2020-12-21 22:10:26,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723922013] [2020-12-21 22:10:26,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:26,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:10:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:10:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 22:10:27,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:27,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-12-21 22:10:27,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442927853] [2020-12-21 22:10:27,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:10:27,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:27,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:10:27,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:10:27,184 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 16 states. [2020-12-21 22:10:27,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:27,738 INFO L93 Difference]: Finished difference Result 175 states and 221 transitions. [2020-12-21 22:10:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:10:27,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-12-21 22:10:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:27,740 INFO L225 Difference]: With dead ends: 175 [2020-12-21 22:10:27,740 INFO L226 Difference]: Without dead ends: 122 [2020-12-21 22:10:27,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:10:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-21 22:10:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2020-12-21 22:10:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-21 22:10:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2020-12-21 22:10:27,751 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 67 [2020-12-21 22:10:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:27,752 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2020-12-21 22:10:27,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:10:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2020-12-21 22:10:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-21 22:10:27,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:27,754 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:27,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:27,968 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash -144131101, now seen corresponding path program 4 times [2020-12-21 22:10:27,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:27,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82773078] [2020-12-21 22:10:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-21 22:10:28,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82773078] [2020-12-21 22:10:28,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178547973] [2020-12-21 22:10:28,208 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 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 22:10:28,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:28,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:10:28,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-12-21 22:10:28,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:28,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2020-12-21 22:10:28,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332685219] [2020-12-21 22:10:28,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:10:28,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:10:28,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:28,427 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand 4 states. [2020-12-21 22:10:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:28,492 INFO L93 Difference]: Finished difference Result 248 states and 305 transitions. [2020-12-21 22:10:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:28,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-12-21 22:10:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:28,498 INFO L225 Difference]: With dead ends: 248 [2020-12-21 22:10:28,498 INFO L226 Difference]: Without dead ends: 180 [2020-12-21 22:10:28,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-21 22:10:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2020-12-21 22:10:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-21 22:10:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-12-21 22:10:28,515 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 107 [2020-12-21 22:10:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:28,516 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-12-21 22:10:28,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:10:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-12-21 22:10:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-21 22:10:28,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:28,518 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:28,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:28,724 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:28,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1579016539, now seen corresponding path program 5 times [2020-12-21 22:10:28,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:28,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303093141] [2020-12-21 22:10:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-21 22:10:29,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303093141] [2020-12-21 22:10:29,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163634632] [2020-12-21 22:10:29,009 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 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