/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:18:15,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:18:15,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:18:15,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:18:15,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:18:15,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:18:15,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:18:15,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:18:15,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:18:15,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:18:15,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:18:15,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:18:15,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:18:15,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:18:15,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:18:15,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:18:15,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:18:15,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:18:15,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:18:15,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:18:15,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:18:15,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:18:15,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:18:15,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:18:15,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 19:18:15,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 19:18:15,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 19:18:15,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 19:18:15,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 19:18:15,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 19:18:15,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:18:15,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:18:15,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:18:15,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:18:15,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:18:15,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:18:15,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:18:15,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:18:15,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:18:15,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:18:15,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:18:15,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:18:15,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:18:16,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:18:16,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:18:16,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:18:16,007 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:18:16,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:18:16,008 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:18:16,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:18:16,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:18:16,009 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:18:16,010 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:18:16,011 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:18:16,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:18:16,011 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:18:16,011 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:18:16,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:18:16,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:18:16,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:18:16,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:18:16,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:18:16,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:18:16,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:18:16,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:18:16,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:18:16,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:18:16,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:18:16,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:18:16,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:18:16,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:18:16,522 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:18:16,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2020-12-22 19:18:16,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be0fcbad7/0b0233c5c35349a484955d6909c9a36e/FLAG14a7fdc0e [2020-12-22 19:18:17,456 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:18:17,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2020-12-22 19:18:17,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be0fcbad7/0b0233c5c35349a484955d6909c9a36e/FLAG14a7fdc0e [2020-12-22 19:18:17,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be0fcbad7/0b0233c5c35349a484955d6909c9a36e [2020-12-22 19:18:17,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:18:17,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:18:17,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:18:17,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:18:17,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:18:17,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:18:17" (1/1) ... [2020-12-22 19:18:17,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5563bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:17, skipping insertion in model container [2020-12-22 19:18:17,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:18:17" (1/1) ... [2020-12-22 19:18:17,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:18:17,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:18:18,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:18:18,013 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:18:18,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:18:18,050 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:18:18,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18 WrapperNode [2020-12-22 19:18:18,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:18:18,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:18:18,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:18:18,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:18:18,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:18:18,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:18:18,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:18:18,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:18:18,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... [2020-12-22 19:18:18,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:18:18,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:18:18,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:18:18,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:18:18,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:18:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:18:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:18:18,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:18:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:18:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:18:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:18:18,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:18:18,712 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 19:18:18,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:18:18 BoogieIcfgContainer [2020-12-22 19:18:18,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:18:18,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:18:18,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:18:18,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:18:18,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:18:17" (1/3) ... [2020-12-22 19:18:18,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71566a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:18:18, skipping insertion in model container [2020-12-22 19:18:18,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:18:18" (2/3) ... [2020-12-22 19:18:18,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71566a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:18:18, skipping insertion in model container [2020-12-22 19:18:18,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:18:18" (3/3) ... [2020-12-22 19:18:18,730 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2020-12-22 19:18:18,757 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:18:18,763 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-22 19:18:18,792 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-22 19:18:18,824 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:18:18,824 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:18:18,824 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:18:18,824 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:18:18,825 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:18:18,825 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:18:18,825 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:18:18,825 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:18:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-22 19:18:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 19:18:18,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:18,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 19:18:18,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2020-12-22 19:18:18,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:18,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402073732] [2020-12-22 19:18:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:19,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402073732] [2020-12-22 19:18:19,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:18:19,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:18:19,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230099493] [2020-12-22 19:18:19,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:18:19,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:18:19,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:18:19,172 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-12-22 19:18:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:19,270 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-12-22 19:18:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:18:19,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-22 19:18:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:19,299 INFO L225 Difference]: With dead ends: 59 [2020-12-22 19:18:19,302 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 19:18:19,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:18:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 19:18:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2020-12-22 19:18:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 19:18:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-22 19:18:19,381 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2020-12-22 19:18:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:19,382 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-22 19:18:19,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:18:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-22 19:18:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:18:19,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:19,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:18:19,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:18:19,386 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:19,391 INFO L82 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2020-12-22 19:18:19,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:19,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508264326] [2020-12-22 19:18:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:19,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508264326] [2020-12-22 19:18:19,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:18:19,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:18:19,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147479487] [2020-12-22 19:18:19,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:18:19,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:19,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:18:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:18:19,471 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2020-12-22 19:18:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:19,557 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-12-22 19:18:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:18:19,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 19:18:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:19,560 INFO L225 Difference]: With dead ends: 58 [2020-12-22 19:18:19,560 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 19:18:19,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:18:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 19:18:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2020-12-22 19:18:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 19:18:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-22 19:18:19,569 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-12-22 19:18:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:19,569 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-22 19:18:19,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:18:19,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-22 19:18:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:18:19,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:19,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:18:19,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:18:19,571 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:19,572 INFO L82 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2020-12-22 19:18:19,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:19,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034396025] [2020-12-22 19:18:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:19,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034396025] [2020-12-22 19:18:19,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:18:19,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:18:19,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138423040] [2020-12-22 19:18:19,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:18:19,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:18:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:18:19,691 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-12-22 19:18:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:19,777 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-22 19:18:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:18:19,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 19:18:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:19,781 INFO L225 Difference]: With dead ends: 32 [2020-12-22 19:18:19,781 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 19:18:19,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:18:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 19:18:19,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 19:18:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 19:18:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-22 19:18:19,804 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2020-12-22 19:18:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:19,804 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-22 19:18:19,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:18:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-22 19:18:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:18:19,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:19,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:18:19,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:18:19,810 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2020-12-22 19:18:19,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:19,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449182829] [2020-12-22 19:18:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:19,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449182829] [2020-12-22 19:18:19,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:18:19,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:18:19,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344021154] [2020-12-22 19:18:19,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:18:19,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:19,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:18:19,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:18:19,933 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2020-12-22 19:18:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:20,076 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-12-22 19:18:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:18:20,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 19:18:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:20,082 INFO L225 Difference]: With dead ends: 55 [2020-12-22 19:18:20,082 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 19:18:20,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:18:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 19:18:20,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2020-12-22 19:18:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 19:18:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-22 19:18:20,094 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-12-22 19:18:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:20,094 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-22 19:18:20,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:18:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-22 19:18:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:18:20,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:20,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:20,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:18:20,097 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:20,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2020-12-22 19:18:20,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:20,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129016203] [2020-12-22 19:18:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:20,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129016203] [2020-12-22 19:18:20,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:18:20,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:18:20,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745261053] [2020-12-22 19:18:20,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:18:20,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:20,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:18:20,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:18:20,192 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-12-22 19:18:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:20,310 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-12-22 19:18:20,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:18:20,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:18:20,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:20,315 INFO L225 Difference]: With dead ends: 60 [2020-12-22 19:18:20,315 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 19:18:20,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:18:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 19:18:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2020-12-22 19:18:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 19:18:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-22 19:18:20,325 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2020-12-22 19:18:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:20,326 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-22 19:18:20,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:18:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-22 19:18:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 19:18:20,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:20,327 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:20,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:18:20,327 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2020-12-22 19:18:20,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:20,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703578815] [2020-12-22 19:18:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:20,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703578815] [2020-12-22 19:18:20,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842768125] [2020-12-22 19:18:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:20,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 19:18:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:20,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:20,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-22 19:18:20,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782953815] [2020-12-22 19:18:20,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:18:20,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:18:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:18:20,516 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-12-22 19:18:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:20,573 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-22 19:18:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:18:20,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 19:18:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:20,575 INFO L225 Difference]: With dead ends: 82 [2020-12-22 19:18:20,575 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 19:18:20,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:18:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 19:18:20,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 38. [2020-12-22 19:18:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 19:18:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-22 19:18:20,581 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 10 [2020-12-22 19:18:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:20,581 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-22 19:18:20,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:18:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-22 19:18:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:18:20,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:20,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:20,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 19:18:20,799 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2020-12-22 19:18:20,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:20,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375896841] [2020-12-22 19:18:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:20,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375896841] [2020-12-22 19:18:20,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117801655] [2020-12-22 19:18:20,934 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 [2020-12-22 19:18:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 19:18:20,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:21,058 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:21,059 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:18:21,066 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:21,086 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:18:21,095 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:18:21,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:18:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:21,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:21,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-12-22 19:18:21,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090960282] [2020-12-22 19:18:21,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:18:21,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:18:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:18:21,140 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 7 states. [2020-12-22 19:18:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:21,304 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2020-12-22 19:18:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:18:21,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 19:18:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:21,305 INFO L225 Difference]: With dead ends: 81 [2020-12-22 19:18:21,306 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 19:18:21,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:18:21,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 19:18:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 39. [2020-12-22 19:18:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 19:18:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-12-22 19:18:21,312 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 11 [2020-12-22 19:18:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:21,312 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-12-22 19:18:21,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:18:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-12-22 19:18:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:18:21,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:21,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:21,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:21,529 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:21,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2020-12-22 19:18:21,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:21,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126863330] [2020-12-22 19:18:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:21,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126863330] [2020-12-22 19:18:21,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097695772] [2020-12-22 19:18:21,634 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 [2020-12-22 19:18:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:18:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:21,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:21,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 19:18:21,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417951965] [2020-12-22 19:18:21,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:18:21,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:18:21,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:18:21,757 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-12-22 19:18:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:21,966 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-12-22 19:18:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:18:21,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-22 19:18:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:21,968 INFO L225 Difference]: With dead ends: 72 [2020-12-22 19:18:21,969 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 19:18:21,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:18:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 19:18:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2020-12-22 19:18:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 19:18:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-12-22 19:18:21,975 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 12 [2020-12-22 19:18:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:21,975 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-12-22 19:18:21,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:18:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-12-22 19:18:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 19:18:21,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:21,976 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-22 19:18:22,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:22,192 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2073745800, now seen corresponding path program 2 times [2020-12-22 19:18:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:22,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703464031] [2020-12-22 19:18:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:22,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703464031] [2020-12-22 19:18:22,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728043165] [2020-12-22 19:18:22,270 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 [2020-12-22 19:18:22,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:18:22,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:22,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:18:22,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:18:22,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:18:22,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-12-22 19:18:22,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551368832] [2020-12-22 19:18:22,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:18:22,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:22,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:18:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:18:22,457 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 6 states. [2020-12-22 19:18:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:22,608 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-12-22 19:18:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:18:22,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 19:18:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:22,609 INFO L225 Difference]: With dead ends: 85 [2020-12-22 19:18:22,609 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 19:18:22,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:18:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 19:18:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 49. [2020-12-22 19:18:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 19:18:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-22 19:18:22,614 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 15 [2020-12-22 19:18:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:22,615 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-22 19:18:22,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:18:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-22 19:18:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:18:22,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:22,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:22,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:22,831 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2020-12-22 19:18:22,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:22,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356006717] [2020-12-22 19:18:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:18:22,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356006717] [2020-12-22 19:18:22,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:18:22,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:18:22,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329611334] [2020-12-22 19:18:22,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:18:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:18:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:18:22,917 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 3 states. [2020-12-22 19:18:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:22,934 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-22 19:18:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:18:22,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-22 19:18:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:22,935 INFO L225 Difference]: With dead ends: 47 [2020-12-22 19:18:22,935 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:18:22,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:18:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:18:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 19:18:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 19:18:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-12-22 19:18:22,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 17 [2020-12-22 19:18:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:22,939 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-12-22 19:18:22,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:18:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-12-22 19:18:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:18:22,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:22,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:22,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 19:18:22,941 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:22,941 INFO L82 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2020-12-22 19:18:22,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:22,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544852981] [2020-12-22 19:18:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:18:22,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544852981] [2020-12-22 19:18:22,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:18:22,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:18:22,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307029052] [2020-12-22 19:18:22,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:18:23,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:18:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:18:23,001 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 4 states. [2020-12-22 19:18:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:23,034 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-22 19:18:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:18:23,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 19:18:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:23,036 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:18:23,036 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:18:23,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:18:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:18:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-12-22 19:18:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 19:18:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-22 19:18:23,039 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 17 [2020-12-22 19:18:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:23,040 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-22 19:18:23,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:18:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-22 19:18:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:18:23,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:23,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:23,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 19:18:23,041 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2020-12-22 19:18:23,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:23,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340408491] [2020-12-22 19:18:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:18:23,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340408491] [2020-12-22 19:18:23,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115034097] [2020-12-22 19:18:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 19:18:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:18:23,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:23,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 19:18:23,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059299963] [2020-12-22 19:18:23,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:18:23,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:23,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:18:23,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:18:23,206 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 5 states. [2020-12-22 19:18:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:23,258 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-12-22 19:18:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:18:23,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-22 19:18:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:23,260 INFO L225 Difference]: With dead ends: 89 [2020-12-22 19:18:23,260 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 19:18:23,260 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 [2020-12-22 19:18:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 19:18:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-12-22 19:18:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:18:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-12-22 19:18:23,264 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 23 [2020-12-22 19:18:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:23,265 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-12-22 19:18:23,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:18:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-12-22 19:18:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 19:18:23,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:23,266 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:23,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 19:18:23,480 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:23,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:23,481 INFO L82 PathProgramCache]: Analyzing trace with hash 31456339, now seen corresponding path program 1 times [2020-12-22 19:18:23,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:23,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395123736] [2020-12-22 19:18:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:18:23,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395123736] [2020-12-22 19:18:23,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824583866] [2020-12-22 19:18:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:18:23,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:18:23,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:23,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-22 19:18:23,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926104951] [2020-12-22 19:18:23,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:18:23,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:18:23,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:18:23,706 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 5 states. [2020-12-22 19:18:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:23,777 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-12-22 19:18:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:18:23,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-22 19:18:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:23,781 INFO L225 Difference]: With dead ends: 87 [2020-12-22 19:18:23,781 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 19:18:23,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:18:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 19:18:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2020-12-22 19:18:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 19:18:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-12-22 19:18:23,795 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 32 [2020-12-22 19:18:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:23,796 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-12-22 19:18:23,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:18:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-12-22 19:18:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:18:23,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:23,801 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:24,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:24,015 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:24,016 INFO L82 PathProgramCache]: Analyzing trace with hash 975146563, now seen corresponding path program 1 times [2020-12-22 19:18:24,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:24,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233047134] [2020-12-22 19:18:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:18:24,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233047134] [2020-12-22 19:18:24,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255843981] [2020-12-22 19:18:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 19:18:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:24,201 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:24,202 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:18:24,205 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:24,228 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:18:24,231 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:18:24,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:18:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:18:24,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:24,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-12-22 19:18:24,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977291447] [2020-12-22 19:18:24,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:18:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:18:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:18:24,329 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 9 states. [2020-12-22 19:18:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:24,505 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-12-22 19:18:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:18:24,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-12-22 19:18:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:24,506 INFO L225 Difference]: With dead ends: 86 [2020-12-22 19:18:24,506 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 19:18:24,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:18:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 19:18:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2020-12-22 19:18:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:18:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-22 19:18:24,510 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 33 [2020-12-22 19:18:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:24,510 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-22 19:18:24,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:18:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-22 19:18:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 19:18:24,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:24,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:24,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 19:18:24,726 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:24,726 INFO L82 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2020-12-22 19:18:24,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:24,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608352954] [2020-12-22 19:18:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:18:24,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608352954] [2020-12-22 19:18:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754489151] [2020-12-22 19:18:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-12-22 19:18:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:24,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:18:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:18:25,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:25,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-22 19:18:25,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453111784] [2020-12-22 19:18:25,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:18:25,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:18:25,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:18:25,040 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-12-22 19:18:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:25,332 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-12-22 19:18:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:18:25,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-22 19:18:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:25,334 INFO L225 Difference]: With dead ends: 68 [2020-12-22 19:18:25,334 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 19:18:25,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:18:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 19:18:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2020-12-22 19:18:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:18:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-12-22 19:18:25,337 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 34 [2020-12-22 19:18:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:25,338 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-12-22 19:18:25,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:18:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-12-22 19:18:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:18:25,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:25,339 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:25,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:18:25,553 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash -414723452, now seen corresponding path program 2 times [2020-12-22 19:18:25,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:25,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996558623] [2020-12-22 19:18:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:18:25,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996558623] [2020-12-22 19:18:25,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061691123] [2020-12-22 19:18:25,640 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 [2020-12-22 19:18:25,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:18:25,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:18:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:18:25,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:25,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-22 19:18:25,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877775145] [2020-12-22 19:18:25,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:18:25,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:25,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:18:25,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:18:25,886 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 13 states. [2020-12-22 19:18:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:26,242 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2020-12-22 19:18:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:18:26,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-22 19:18:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:26,244 INFO L225 Difference]: With dead ends: 122 [2020-12-22 19:18:26,244 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 19:18:26,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:18:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 19:18:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 78. [2020-12-22 19:18:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 19:18:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-12-22 19:18:26,248 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 37 [2020-12-22 19:18:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:26,249 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-12-22 19:18:26,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:18:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-12-22 19:18:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 19:18:26,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:26,250 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:26,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:18:26,465 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:26,466 INFO L82 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2020-12-22 19:18:26,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:26,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500441242] [2020-12-22 19:18:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 19:18:26,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500441242] [2020-12-22 19:18:26,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119133609] [2020-12-22 19:18:26,646 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:26,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:18:26,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:18:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:26,728 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_20|]} [2020-12-22 19:18:26,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:18:26,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:18:26,736 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:26,747 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:18:26,755 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-22 19:18:26,757 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:26,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:26,766 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:18:26,767 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-22 19:18:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 19:18:26,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:18:26,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2020-12-22 19:18:26,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348349494] [2020-12-22 19:18:26,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:18:26,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:18:26,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:18:26,991 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 5 states. [2020-12-22 19:18:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:27,097 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-12-22 19:18:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:18:27,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-22 19:18:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:27,099 INFO L225 Difference]: With dead ends: 78 [2020-12-22 19:18:27,099 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 19:18:27,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:18:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 19:18:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-22 19:18:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 19:18:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-12-22 19:18:27,102 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 39 [2020-12-22 19:18:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:27,103 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-12-22 19:18:27,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:18:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-12-22 19:18:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:18:27,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:27,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:27,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 19:18:27,312 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash -900044039, now seen corresponding path program 2 times [2020-12-22 19:18:27,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:27,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449667793] [2020-12-22 19:18:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 19:18:27,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449667793] [2020-12-22 19:18:27,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709041057] [2020-12-22 19:18:27,454 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:27,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:18:27,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:18:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:27,513 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_21|]} [2020-12-22 19:18:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:18:27,523 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:18:27,525 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:27,536 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:27,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:18:27,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-22 19:18:27,546 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:27,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:27,555 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:18:27,555 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-22 19:18:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 19:18:27,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:18:27,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 19:18:27,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131812679] [2020-12-22 19:18:27,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:18:27,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:18:27,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:18:27,766 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 4 states. [2020-12-22 19:18:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:27,824 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-12-22 19:18:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:18:27,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-12-22 19:18:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:27,826 INFO L225 Difference]: With dead ends: 77 [2020-12-22 19:18:27,826 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 19:18:27,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:18:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 19:18:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-22 19:18:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 19:18:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-22 19:18:27,830 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 45 [2020-12-22 19:18:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:27,830 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-22 19:18:27,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:18:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-22 19:18:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 19:18:27,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:27,832 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:28,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:18:28,048 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash 268859179, now seen corresponding path program 1 times [2020-12-22 19:18:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:28,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235387716] [2020-12-22 19:18:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 19:18:28,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235387716] [2020-12-22 19:18:28,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902761661] [2020-12-22 19:18:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:28,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:18:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 19:18:28,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:28,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 19:18:28,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770920141] [2020-12-22 19:18:28,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:18:28,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:18:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:18:28,289 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 6 states. [2020-12-22 19:18:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:28,361 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-12-22 19:18:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:18:28,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-12-22 19:18:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:28,362 INFO L225 Difference]: With dead ends: 123 [2020-12-22 19:18:28,362 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 19:18:28,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:18:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 19:18:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 86. [2020-12-22 19:18:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 19:18:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-12-22 19:18:28,366 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 48 [2020-12-22 19:18:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:28,367 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-12-22 19:18:28,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:18:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-12-22 19:18:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 19:18:28,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:28,368 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-22 19:18:28,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:28,583 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash 524134016, now seen corresponding path program 3 times [2020-12-22 19:18:28,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:28,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891304231] [2020-12-22 19:18:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 19:18:28,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891304231] [2020-12-22 19:18:28,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974634913] [2020-12-22 19:18:28,736 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:28,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:18:28,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:28,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:18:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 102 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 19:18:28,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:28,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 19:18:28,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538534364] [2020-12-22 19:18:28,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:18:28,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:28,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:18:28,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:18:28,941 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 10 states. [2020-12-22 19:18:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:29,128 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2020-12-22 19:18:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:18:29,128 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-12-22 19:18:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:29,131 INFO L225 Difference]: With dead ends: 142 [2020-12-22 19:18:29,132 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 19:18:29,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:18:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 19:18:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-12-22 19:18:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 19:18:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-12-22 19:18:29,137 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 59 [2020-12-22 19:18:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:29,137 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-12-22 19:18:29,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:18:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-12-22 19:18:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 19:18:29,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:29,138 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-22 19:18:29,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-22 19:18:29,354 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash -931714634, now seen corresponding path program 2 times [2020-12-22 19:18:29,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:29,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179232539] [2020-12-22 19:18:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 19:18:29,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179232539] [2020-12-22 19:18:29,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917121131] [2020-12-22 19:18:29,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:29,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:18:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:18:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:29,642 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:29,643 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:18:29,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:29,676 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-22 19:18:29,679 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:18:29,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2020-12-22 19:18:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-22 19:18:29,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:29,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-22 19:18:29,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263284239] [2020-12-22 19:18:29,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:18:29,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:29,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:18:29,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:18:29,887 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 12 states. [2020-12-22 19:18:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:30,970 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2020-12-22 19:18:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 19:18:30,971 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-12-22 19:18:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:30,973 INFO L225 Difference]: With dead ends: 185 [2020-12-22 19:18:30,973 INFO L226 Difference]: Without dead ends: 185 [2020-12-22 19:18:30,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=381, Invalid=809, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:18:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-22 19:18:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 106. [2020-12-22 19:18:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 19:18:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2020-12-22 19:18:30,979 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 60 [2020-12-22 19:18:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:30,979 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2020-12-22 19:18:30,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:18:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2020-12-22 19:18:30,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 19:18:30,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:30,981 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:18:31,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:31,197 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:31,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1155691089, now seen corresponding path program 2 times [2020-12-22 19:18:31,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:31,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958584881] [2020-12-22 19:18:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-22 19:18:31,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958584881] [2020-12-22 19:18:31,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267901598] [2020-12-22 19:18:31,277 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 [2020-12-22 19:18:31,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:18:31,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:31,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:18:31,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-22 19:18:31,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:18:31,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2020-12-22 19:18:31,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647937055] [2020-12-22 19:18:31,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:18:31,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:18:31,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:18:31,498 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand 4 states. [2020-12-22 19:18:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:31,534 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2020-12-22 19:18:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:18:31,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 19:18:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:31,536 INFO L225 Difference]: With dead ends: 105 [2020-12-22 19:18:31,536 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 19:18:31,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:18:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 19:18:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 19:18:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 19:18:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-12-22 19:18:31,539 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 70 [2020-12-22 19:18:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:31,540 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-12-22 19:18:31,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:18:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-12-22 19:18:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 19:18:31,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:31,541 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2020-12-22 19:18:31,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:18:31,755 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash -7252837, now seen corresponding path program 3 times [2020-12-22 19:18:31,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:31,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464988263] [2020-12-22 19:18:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-22 19:18:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464988263] [2020-12-22 19:18:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790973136] [2020-12-22 19:18:31,955 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 [2020-12-22 19:18:32,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 19:18:32,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:32,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 19:18:32,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:32,084 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:32,089 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:18:32,092 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:32,116 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:18:32,118 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:18:32,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:18:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-22 19:18:32,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:32,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 19:18:32,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748863240] [2020-12-22 19:18:32,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:18:32,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:32,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:18:32,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:18:32,318 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 10 states. [2020-12-22 19:18:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:32,570 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2020-12-22 19:18:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:18:32,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-12-22 19:18:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:32,572 INFO L225 Difference]: With dead ends: 121 [2020-12-22 19:18:32,572 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 19:18:32,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:18:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 19:18:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93. [2020-12-22 19:18:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 19:18:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-12-22 19:18:32,576 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 87 [2020-12-22 19:18:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:32,576 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-12-22 19:18:32,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:18:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-12-22 19:18:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 19:18:32,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:32,578 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2020-12-22 19:18:32,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:32,794 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:32,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1888939738, now seen corresponding path program 4 times [2020-12-22 19:18:32,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:32,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846052020] [2020-12-22 19:18:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 256 proven. 149 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 19:18:32,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846052020] [2020-12-22 19:18:32,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082522484] [2020-12-22 19:18:32,920 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 [2020-12-22 19:18:33,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:18:33,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:33,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:18:33,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 299 proven. 106 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 19:18:33,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:33,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-22 19:18:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678867807] [2020-12-22 19:18:33,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:18:33,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:33,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:18:33,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:18:33,307 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 14 states. [2020-12-22 19:18:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:33,649 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-12-22 19:18:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:18:33,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-12-22 19:18:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:33,652 INFO L225 Difference]: With dead ends: 102 [2020-12-22 19:18:33,652 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 19:18:33,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:18:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 19:18:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-12-22 19:18:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 19:18:33,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-12-22 19:18:33,656 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 92 [2020-12-22 19:18:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:33,656 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-12-22 19:18:33,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:18:33,656 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-12-22 19:18:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 19:18:33,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:33,658 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2020-12-22 19:18:33,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:18:33,872 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash -453315645, now seen corresponding path program 5 times [2020-12-22 19:18:33,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:33,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181266525] [2020-12-22 19:18:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 62 proven. 445 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 19:18:34,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181266525] [2020-12-22 19:18:34,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735813803] [2020-12-22 19:18:34,040 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 [2020-12-22 19:18:34,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 19:18:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 19:18:34,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 83 proven. 424 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 19:18:34,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:34,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2020-12-22 19:18:34,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287598322] [2020-12-22 19:18:34,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:18:34,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:18:34,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:18:34,454 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 20 states. [2020-12-22 19:18:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:35,232 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2020-12-22 19:18:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:18:35,232 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-12-22 19:18:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:35,233 INFO L225 Difference]: With dead ends: 142 [2020-12-22 19:18:35,234 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 19:18:35,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:18:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 19:18:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2020-12-22 19:18:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 19:18:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2020-12-22 19:18:35,240 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 97 [2020-12-22 19:18:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:35,241 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2020-12-22 19:18:35,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:18:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2020-12-22 19:18:35,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 19:18:35,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:35,243 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2020-12-22 19:18:35,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 19:18:35,457 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:35,458 INFO L82 PathProgramCache]: Analyzing trace with hash 368932662, now seen corresponding path program 6 times [2020-12-22 19:18:35,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:35,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818267328] [2020-12-22 19:18:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 453 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2020-12-22 19:18:35,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818267328] [2020-12-22 19:18:35,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714043026] [2020-12-22 19:18:35,719 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 [2020-12-22 19:18:35,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 19:18:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:35,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 19:18:35,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:35,919 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:35,920 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:18:35,922 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:35,951 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:18:35,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:18:35,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:18:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 453 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2020-12-22 19:18:36,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:36,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 19:18:36,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489940936] [2020-12-22 19:18:36,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:18:36,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:18:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:18:36,217 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 11 states. [2020-12-22 19:18:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:36,517 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2020-12-22 19:18:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:18:36,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2020-12-22 19:18:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:36,519 INFO L225 Difference]: With dead ends: 149 [2020-12-22 19:18:36,520 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 19:18:36,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:18:36,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 19:18:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2020-12-22 19:18:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 19:18:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-12-22 19:18:36,524 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 124 [2020-12-22 19:18:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:36,524 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-12-22 19:18:36,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:18:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-12-22 19:18:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 19:18:36,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:36,526 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2020-12-22 19:18:36,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:18:36,740 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1964034785, now seen corresponding path program 7 times [2020-12-22 19:18:36,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:36,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694039640] [2020-12-22 19:18:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 552 proven. 334 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-12-22 19:18:36,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694039640] [2020-12-22 19:18:36,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752673823] [2020-12-22 19:18:36,957 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 [2020-12-22 19:18:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:18:37,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 648 proven. 238 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-12-22 19:18:37,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:37,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-12-22 19:18:37,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725142237] [2020-12-22 19:18:37,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:18:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:18:37,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:18:37,468 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 17 states. [2020-12-22 19:18:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:38,064 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-12-22 19:18:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:18:38,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2020-12-22 19:18:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:38,067 INFO L225 Difference]: With dead ends: 135 [2020-12-22 19:18:38,068 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 19:18:38,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=727, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:18:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 19:18:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-12-22 19:18:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 19:18:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2020-12-22 19:18:38,076 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 129 [2020-12-22 19:18:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:38,077 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2020-12-22 19:18:38,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:18:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2020-12-22 19:18:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 19:18:38,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:38,078 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2020-12-22 19:18:38,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 19:18:38,294 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1163440626, now seen corresponding path program 8 times [2020-12-22 19:18:38,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:38,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030818081] [2020-12-22 19:18:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 95 proven. 931 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-22 19:18:38,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030818081] [2020-12-22 19:18:38,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890080270] [2020-12-22 19:18:38,581 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 [2020-12-22 19:18:38,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:18:38,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:18:38,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 65 proven. 961 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-22 19:18:39,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:39,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2020-12-22 19:18:39,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472773279] [2020-12-22 19:18:39,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:18:39,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:18:39,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:18:39,309 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 28 states. [2020-12-22 19:18:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:40,994 INFO L93 Difference]: Finished difference Result 184 states and 187 transitions. [2020-12-22 19:18:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 19:18:40,995 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 134 [2020-12-22 19:18:40,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:40,997 INFO L225 Difference]: With dead ends: 184 [2020-12-22 19:18:40,997 INFO L226 Difference]: Without dead ends: 184 [2020-12-22 19:18:41,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=782, Invalid=2878, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 19:18:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-22 19:18:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 172. [2020-12-22 19:18:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 19:18:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2020-12-22 19:18:41,006 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 134 [2020-12-22 19:18:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:41,006 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2020-12-22 19:18:41,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:18:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2020-12-22 19:18:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 19:18:41,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:41,008 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1] [2020-12-22 19:18:41,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:18:41,222 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:41,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1726456682, now seen corresponding path program 9 times [2020-12-22 19:18:41,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:41,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451802928] [2020-12-22 19:18:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 0 proven. 755 refuted. 0 times theorem prover too weak. 1025 trivial. 0 not checked. [2020-12-22 19:18:41,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451802928] [2020-12-22 19:18:41,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924988991] [2020-12-22 19:18:41,620 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 [2020-12-22 19:18:41,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 19:18:41,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:18:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:41,764 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:41,765 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:18:41,767 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:41,787 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:18:41,790 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:18:41,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:18:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 0 proven. 755 refuted. 0 times theorem prover too weak. 1025 trivial. 0 not checked. [2020-12-22 19:18:42,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:42,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 19:18:42,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101554427] [2020-12-22 19:18:42,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:18:42,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:18:42,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:18:42,154 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand 12 states. [2020-12-22 19:18:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:42,552 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2020-12-22 19:18:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:18:42,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2020-12-22 19:18:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:42,555 INFO L225 Difference]: With dead ends: 191 [2020-12-22 19:18:42,555 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 19:18:42,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:18:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 19:18:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 177. [2020-12-22 19:18:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 19:18:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2020-12-22 19:18:42,563 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 166 [2020-12-22 19:18:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:42,563 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2020-12-22 19:18:42,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:18:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2020-12-22 19:18:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 19:18:42,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:42,565 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1] [2020-12-22 19:18:42,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:42,779 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:42,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1438873237, now seen corresponding path program 10 times [2020-12-22 19:18:42,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:42,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616064451] [2020-12-22 19:18:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1913 backedges. 1070 proven. 603 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-12-22 19:18:43,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616064451] [2020-12-22 19:18:43,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671634152] [2020-12-22 19:18:43,044 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 [2020-12-22 19:18:43,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:18:43,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:43,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:18:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1913 backedges. 164 proven. 1580 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-22 19:18:43,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:43,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2020-12-22 19:18:43,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934838841] [2020-12-22 19:18:43,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:18:43,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:18:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:18:43,824 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 27 states. [2020-12-22 19:18:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:46,120 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2020-12-22 19:18:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 19:18:46,122 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 171 [2020-12-22 19:18:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:46,124 INFO L225 Difference]: With dead ends: 231 [2020-12-22 19:18:46,124 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 19:18:46,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=803, Invalid=4453, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 19:18:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 19:18:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 219. [2020-12-22 19:18:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 19:18:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2020-12-22 19:18:46,133 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 171 [2020-12-22 19:18:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:46,134 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2020-12-22 19:18:46,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:18:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2020-12-22 19:18:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-12-22 19:18:46,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:46,136 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1] [2020-12-22 19:18:46,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:46,351 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:46,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1001623513, now seen corresponding path program 11 times [2020-12-22 19:18:46,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:46,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286110214] [2020-12-22 19:18:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3054 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-12-22 19:18:46,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286110214] [2020-12-22 19:18:46,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583789100] [2020-12-22 19:18:46,895 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 [2020-12-22 19:18:47,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 19:18:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:47,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:18:47,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3054 backedges. 1898 proven. 852 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2020-12-22 19:18:47,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:47,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 28 [2020-12-22 19:18:47,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353174711] [2020-12-22 19:18:47,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:18:47,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:47,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:18:47,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:18:47,923 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand 28 states. [2020-12-22 19:18:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:51,072 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-12-22 19:18:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 19:18:51,073 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 213 [2020-12-22 19:18:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:51,075 INFO L225 Difference]: With dead ends: 232 [2020-12-22 19:18:51,075 INFO L226 Difference]: Without dead ends: 232 [2020-12-22 19:18:51,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=811, Invalid=2849, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 19:18:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-22 19:18:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-12-22 19:18:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-22 19:18:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-12-22 19:18:51,087 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 213 [2020-12-22 19:18:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:51,088 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-12-22 19:18:51,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:18:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-12-22 19:18:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-22 19:18:51,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:51,098 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1] [2020-12-22 19:18:51,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:51,300 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:51,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1709664191, now seen corresponding path program 12 times [2020-12-22 19:18:51,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:51,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474357075] [2020-12-22 19:18:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3407 backedges. 182 proven. 2918 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2020-12-22 19:18:51,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474357075] [2020-12-22 19:18:51,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528311549] [2020-12-22 19:18:51,727 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:52,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 19:18:52,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:18:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 19:18:52,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:52,053 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:18:52,054 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:18:52,058 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:18:52,090 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-22 19:18:52,093 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:18:52,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2020-12-22 19:18:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3407 backedges. 0 proven. 2952 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-12-22 19:18:52,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:52,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 28 [2020-12-22 19:18:52,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402811192] [2020-12-22 19:18:52,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:18:52,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:18:52,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:18:52,859 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 28 states. [2020-12-22 19:18:57,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:18:57,926 INFO L93 Difference]: Finished difference Result 277 states and 280 transitions. [2020-12-22 19:18:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-22 19:18:57,927 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 223 [2020-12-22 19:18:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:18:57,930 INFO L225 Difference]: With dead ends: 277 [2020-12-22 19:18:57,930 INFO L226 Difference]: Without dead ends: 277 [2020-12-22 19:18:57,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4849 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3121, Invalid=9761, Unknown=0, NotChecked=0, Total=12882 [2020-12-22 19:18:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-22 19:18:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 271. [2020-12-22 19:18:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 19:18:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2020-12-22 19:18:57,953 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 223 [2020-12-22 19:18:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:18:57,954 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2020-12-22 19:18:57,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:18:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2020-12-22 19:18:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-12-22 19:18:57,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:18:57,956 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1] [2020-12-22 19:18:58,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 19:18:58,172 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:18:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:18:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1493870715, now seen corresponding path program 13 times [2020-12-22 19:18:58,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:18:58,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553497106] [2020-12-22 19:18:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:18:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4886 backedges. 0 proven. 1689 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2020-12-22 19:18:58,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553497106] [2020-12-22 19:18:58,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698316396] [2020-12-22 19:18:58,698 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:18:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:18:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 19:18:58,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:18:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4886 backedges. 3283 proven. 1132 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2020-12-22 19:18:59,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:18:59,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 28 [2020-12-22 19:18:59,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922269896] [2020-12-22 19:18:59,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:18:59,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:18:59,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:18:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:18:59,647 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand 28 states. [2020-12-22 19:19:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:19:03,136 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2020-12-22 19:19:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 19:19:03,138 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 265 [2020-12-22 19:19:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:19:03,141 INFO L225 Difference]: With dead ends: 284 [2020-12-22 19:19:03,141 INFO L226 Difference]: Without dead ends: 284 [2020-12-22 19:19:03,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1310, Invalid=3946, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 19:19:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-12-22 19:19:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 276. [2020-12-22 19:19:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-22 19:19:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2020-12-22 19:19:03,150 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 265 [2020-12-22 19:19:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:19:03,151 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2020-12-22 19:19:03,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:19:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2020-12-22 19:19:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-12-22 19:19:03,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:19:03,154 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1] [2020-12-22 19:19:03,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:03,369 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:19:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:19:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash -886621277, now seen corresponding path program 14 times [2020-12-22 19:19:03,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:19:03,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187086592] [2020-12-22 19:19:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:19:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:19:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5331 backedges. 236 proven. 4640 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-12-22 19:19:04,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187086592] [2020-12-22 19:19:04,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629173368] [2020-12-22 19:19:04,039 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:04,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:19:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:19:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:19:04,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:19:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5331 backedges. 164 proven. 4712 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-12-22 19:19:05,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:19:05,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 40 [2020-12-22 19:19:05,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987034619] [2020-12-22 19:19:05,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 19:19:05,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:19:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 19:19:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1283, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:19:05,498 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand 40 states. [2020-12-22 19:19:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:19:09,711 INFO L93 Difference]: Finished difference Result 340 states and 343 transitions. [2020-12-22 19:19:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 19:19:09,712 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 275 [2020-12-22 19:19:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:19:09,715 INFO L225 Difference]: With dead ends: 340 [2020-12-22 19:19:09,715 INFO L226 Difference]: Without dead ends: 340 [2020-12-22 19:19:09,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2162, Invalid=8344, Unknown=0, NotChecked=0, Total=10506 [2020-12-22 19:19:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-12-22 19:19:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2020-12-22 19:19:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 19:19:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 331 transitions. [2020-12-22 19:19:09,726 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 331 transitions. Word has length 275 [2020-12-22 19:19:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:19:09,727 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 331 transitions. [2020-12-22 19:19:09,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 19:19:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 331 transitions. [2020-12-22 19:19:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-12-22 19:19:09,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:19:09,730 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2020-12-22 19:19:09,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 19:19:09,931 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:19:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:19:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2013593962, now seen corresponding path program 15 times [2020-12-22 19:19:09,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:19:09,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082053293] [2020-12-22 19:19:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:19:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:19:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7414 backedges. 0 proven. 2351 refuted. 0 times theorem prover too weak. 5063 trivial. 0 not checked. [2020-12-22 19:19:10,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082053293] [2020-12-22 19:19:10,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284923604] [2020-12-22 19:19:10,985 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:11,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 19:19:11,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:19:11,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 19:19:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:19:11,227 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:19:11,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:19:11,231 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:19:11,260 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:19:11,263 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:19:11,264 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:19:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7414 backedges. 0 proven. 2351 refuted. 0 times theorem prover too weak. 5063 trivial. 0 not checked. [2020-12-22 19:19:12,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:19:12,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 19:19:12,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818026701] [2020-12-22 19:19:12,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:19:12,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:19:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:19:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:19:12,199 INFO L87 Difference]: Start difference. First operand 328 states and 331 transitions. Second operand 15 states. [2020-12-22 19:19:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:19:12,854 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2020-12-22 19:19:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:19:12,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 322 [2020-12-22 19:19:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:19:12,857 INFO L225 Difference]: With dead ends: 347 [2020-12-22 19:19:12,858 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 19:19:12,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:19:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 19:19:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 333. [2020-12-22 19:19:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-12-22 19:19:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 337 transitions. [2020-12-22 19:19:12,867 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 337 transitions. Word has length 322 [2020-12-22 19:19:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:19:12,868 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 337 transitions. [2020-12-22 19:19:12,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:19:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 337 transitions. [2020-12-22 19:19:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-12-22 19:19:12,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:19:12,872 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2020-12-22 19:19:13,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:13,080 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:19:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:19:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash -786478657, now seen corresponding path program 16 times [2020-12-22 19:19:13,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:19:13,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596490795] [2020-12-22 19:19:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:19:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:19:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7685 backedges. 4911 proven. 2064 refuted. 0 times theorem prover too weak. 710 trivial. 0 not checked. [2020-12-22 19:19:13,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596490795] [2020-12-22 19:19:13,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39287735] [2020-12-22 19:19:13,623 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:14,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:19:14,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:19:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 19:19:14,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:19:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7685 backedges. 341 proven. 6741 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2020-12-22 19:19:15,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:19:15,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2020-12-22 19:19:15,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165235869] [2020-12-22 19:19:15,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 19:19:15,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:19:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 19:19:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:19:15,414 INFO L87 Difference]: Start difference. First operand 333 states and 337 transitions. Second operand 39 states. [2020-12-22 19:19:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:19:21,288 INFO L93 Difference]: Finished difference Result 402 states and 405 transitions. [2020-12-22 19:19:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-22 19:19:21,289 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 327 [2020-12-22 19:19:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:19:21,293 INFO L225 Difference]: With dead ends: 402 [2020-12-22 19:19:21,293 INFO L226 Difference]: Without dead ends: 402 [2020-12-22 19:19:21,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4319 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1873, Invalid=12647, Unknown=0, NotChecked=0, Total=14520 [2020-12-22 19:19:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-22 19:19:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2020-12-22 19:19:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-12-22 19:19:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 393 transitions. [2020-12-22 19:19:21,309 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 393 transitions. Word has length 327 [2020-12-22 19:19:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:19:21,310 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 393 transitions. [2020-12-22 19:19:21,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 19:19:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 393 transitions. [2020-12-22 19:19:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-12-22 19:19:21,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:19:21,314 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2020-12-22 19:19:21,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 19:19:21,528 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:19:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:19:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1649762294, now seen corresponding path program 17 times [2020-12-22 19:19:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:19:21,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019219437] [2020-12-22 19:19:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:19:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:19:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2020-12-22 19:19:22,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019219437] [2020-12-22 19:19:22,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095483909] [2020-12-22 19:19:22,630 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:23,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 19:19:23,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:19:23,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:19:23,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:19:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 7243 proven. 2639 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2020-12-22 19:19:24,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:19:24,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 36 [2020-12-22 19:19:24,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042941781] [2020-12-22 19:19:24,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:19:24,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:19:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:19:24,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:19:24,932 INFO L87 Difference]: Start difference. First operand 390 states and 393 transitions. Second operand 36 states. [2020-12-22 19:19:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:19:31,399 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2020-12-22 19:19:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 19:19:31,400 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 384 [2020-12-22 19:19:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:19:31,404 INFO L225 Difference]: With dead ends: 403 [2020-12-22 19:19:31,404 INFO L226 Difference]: Without dead ends: 403 [2020-12-22 19:19:31,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1736, Invalid=7194, Unknown=0, NotChecked=0, Total=8930 [2020-12-22 19:19:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-22 19:19:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 395. [2020-12-22 19:19:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 19:19:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 397 transitions. [2020-12-22 19:19:31,413 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 397 transitions. Word has length 384 [2020-12-22 19:19:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:19:31,414 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 397 transitions. [2020-12-22 19:19:31,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:19:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 397 transitions. [2020-12-22 19:19:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-12-22 19:19:31,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:19:31,417 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 65, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2020-12-22 19:19:31,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:31,632 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:19:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:19:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash -554421646, now seen corresponding path program 18 times [2020-12-22 19:19:31,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:19:31,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507043469] [2020-12-22 19:19:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:19:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:19:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11450 backedges. 365 proven. 10206 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2020-12-22 19:19:32,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507043469] [2020-12-22 19:19:32,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540858461] [2020-12-22 19:19:32,256 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:32,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-22 19:19:32,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:19:32,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:19:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:19:32,830 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:19:32,831 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:19:32,832 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:19:32,852 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:19:32,854 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:19:32,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:19:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11450 backedges. 0 proven. 3548 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2020-12-22 19:19:34,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:19:34,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 38 [2020-12-22 19:19:34,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914590255] [2020-12-22 19:19:34,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:19:34,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:19:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:19:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:19:34,301 INFO L87 Difference]: Start difference. First operand 395 states and 397 transitions. Second operand 38 states. [2020-12-22 19:19:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:19:43,822 INFO L93 Difference]: Finished difference Result 486 states and 490 transitions. [2020-12-22 19:19:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-12-22 19:19:43,824 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 394 [2020-12-22 19:19:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:19:43,826 INFO L225 Difference]: With dead ends: 486 [2020-12-22 19:19:43,827 INFO L226 Difference]: Without dead ends: 486 [2020-12-22 19:19:43,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5684 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=4626, Invalid=14280, Unknown=0, NotChecked=0, Total=18906 [2020-12-22 19:19:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-12-22 19:19:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 462. [2020-12-22 19:19:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-12-22 19:19:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 466 transitions. [2020-12-22 19:19:43,839 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 466 transitions. Word has length 394 [2020-12-22 19:19:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:19:43,840 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 466 transitions. [2020-12-22 19:19:43,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:19:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 466 transitions. [2020-12-22 19:19:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-12-22 19:19:43,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:19:43,843 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2020-12-22 19:19:44,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:19:44,058 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:19:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:19:44,059 INFO L82 PathProgramCache]: Analyzing trace with hash -168156498, now seen corresponding path program 19 times [2020-12-22 19:19:44,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:19:44,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890428675] [2020-12-22 19:19:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:19:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:19:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15573 backedges. 10595 proven. 3733 refuted. 0 times theorem prover too weak. 1245 trivial. 0 not checked. [2020-12-22 19:19:44,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890428675] [2020-12-22 19:19:44,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267500345] [2020-12-22 19:19:44,779 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:19:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:19:45,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:19:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15573 backedges. 11240 proven. 3088 refuted. 0 times theorem prover too weak. 1245 trivial. 0 not checked. [2020-12-22 19:19:46,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:19:46,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2020-12-22 19:19:46,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631804790] [2020-12-22 19:19:46,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:19:46,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:19:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:19:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:19:46,206 INFO L87 Difference]: Start difference. First operand 462 states and 466 transitions. Second operand 35 states. [2020-12-22 19:19:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:19:49,595 INFO L93 Difference]: Finished difference Result 462 states and 464 transitions. [2020-12-22 19:19:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 19:19:49,596 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 456 [2020-12-22 19:19:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:19:49,599 INFO L225 Difference]: With dead ends: 462 [2020-12-22 19:19:49,599 INFO L226 Difference]: Without dead ends: 462 [2020-12-22 19:19:49,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2722, Invalid=7378, Unknown=0, NotChecked=0, Total=10100 [2020-12-22 19:19:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-22 19:19:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 462. [2020-12-22 19:19:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-12-22 19:19:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 464 transitions. [2020-12-22 19:19:49,611 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 464 transitions. Word has length 456 [2020-12-22 19:19:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:19:49,612 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 464 transitions. [2020-12-22 19:19:49,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:19:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 464 transitions. [2020-12-22 19:19:49,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-12-22 19:19:49,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:19:49,616 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 77, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2020-12-22 19:19:49,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:19:49,830 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:19:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:19:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2145087521, now seen corresponding path program 20 times [2020-12-22 19:19:49,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:19:49,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131250567] [2020-12-22 19:19:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:19:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:19:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15966 backedges. 440 proven. 14361 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2020-12-22 19:19:50,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131250567] [2020-12-22 19:19:50,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041269693] [2020-12-22 19:19:50,775 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:19:51,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:19:51,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:19:51,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:19:51,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:19:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15966 backedges. 308 proven. 14493 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2020-12-22 19:19:53,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:19:53,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 52 [2020-12-22 19:19:53,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174343911] [2020-12-22 19:19:53,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 19:19:53,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:19:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 19:19:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2177, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:19:53,203 INFO L87 Difference]: Start difference. First operand 462 states and 464 transitions. Second operand 52 states. [2020-12-22 19:19:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:19:59,839 INFO L93 Difference]: Finished difference Result 541 states and 544 transitions. [2020-12-22 19:19:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 19:19:59,843 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 461 [2020-12-22 19:19:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:19:59,846 INFO L225 Difference]: With dead ends: 541 [2020-12-22 19:19:59,846 INFO L226 Difference]: Without dead ends: 541 [2020-12-22 19:19:59,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8296 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4718, Invalid=18844, Unknown=0, NotChecked=0, Total=23562 [2020-12-22 19:19:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-12-22 19:19:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 529. [2020-12-22 19:19:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-12-22 19:19:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 532 transitions. [2020-12-22 19:19:59,860 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 532 transitions. Word has length 461 [2020-12-22 19:19:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:19:59,860 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 532 transitions. [2020-12-22 19:19:59,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 19:19:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 532 transitions. [2020-12-22 19:19:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-12-22 19:19:59,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:19:59,865 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 88, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1] [2020-12-22 19:20:00,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:20:00,078 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:20:00,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:00,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2052132699, now seen corresponding path program 21 times [2020-12-22 19:20:00,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:00,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19141072] [2020-12-22 19:20:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20779 backedges. 0 proven. 5297 refuted. 0 times theorem prover too weak. 15482 trivial. 0 not checked. [2020-12-22 19:20:01,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19141072] [2020-12-22 19:20:01,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919494184] [2020-12-22 19:20:01,378 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:01,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-22 19:20:01,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:20:01,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:20:01,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:01,630 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:20:01,630 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:20:01,632 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:20:01,658 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:20:01,661 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:20:01,661 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:20:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20779 backedges. 0 proven. 5297 refuted. 0 times theorem prover too weak. 15482 trivial. 0 not checked. [2020-12-22 19:20:03,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:03,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 19:20:03,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364725633] [2020-12-22 19:20:03,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 19:20:03,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:03,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 19:20:03,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:20:03,095 INFO L87 Difference]: Start difference. First operand 529 states and 532 transitions. Second operand 18 states. [2020-12-22 19:20:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:03,961 INFO L93 Difference]: Finished difference Result 548 states and 552 transitions. [2020-12-22 19:20:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:20:03,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 523 [2020-12-22 19:20:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:03,968 INFO L225 Difference]: With dead ends: 548 [2020-12-22 19:20:03,968 INFO L226 Difference]: Without dead ends: 548 [2020-12-22 19:20:03,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:20:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-12-22 19:20:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 534. [2020-12-22 19:20:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-12-22 19:20:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 538 transitions. [2020-12-22 19:20:03,978 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 538 transitions. Word has length 523 [2020-12-22 19:20:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:03,979 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 538 transitions. [2020-12-22 19:20:03,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 19:20:03,979 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 538 transitions. [2020-12-22 19:20:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2020-12-22 19:20:03,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:03,984 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 89, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1] [2020-12-22 19:20:04,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 19:20:04,198 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:20:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2109871078, now seen corresponding path program 22 times [2020-12-22 19:20:04,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:04,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102192411] [2020-12-22 19:20:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21233 backedges. 14818 proven. 4821 refuted. 0 times theorem prover too weak. 1594 trivial. 0 not checked. [2020-12-22 19:20:05,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102192411] [2020-12-22 19:20:05,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600220125] [2020-12-22 19:20:05,105 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:05,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:20:05,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:20:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:20:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21233 backedges. 15593 proven. 4046 refuted. 0 times theorem prover too weak. 1594 trivial. 0 not checked. [2020-12-22 19:20:07,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:07,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2020-12-22 19:20:07,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756020511] [2020-12-22 19:20:07,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:20:07,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:07,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:20:07,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:20:07,096 INFO L87 Difference]: Start difference. First operand 534 states and 538 transitions. Second operand 38 states. [2020-12-22 19:20:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:11,325 INFO L93 Difference]: Finished difference Result 534 states and 536 transitions. [2020-12-22 19:20:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-22 19:20:11,326 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 528 [2020-12-22 19:20:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:11,333 INFO L225 Difference]: With dead ends: 534 [2020-12-22 19:20:11,333 INFO L226 Difference]: Without dead ends: 534 [2020-12-22 19:20:11,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3625, Invalid=9715, Unknown=0, NotChecked=0, Total=13340 [2020-12-22 19:20:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-12-22 19:20:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2020-12-22 19:20:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-12-22 19:20:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 536 transitions. [2020-12-22 19:20:11,349 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 536 transitions. Word has length 528 [2020-12-22 19:20:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:11,350 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 536 transitions. [2020-12-22 19:20:11,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:20:11,350 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 536 transitions. [2020-12-22 19:20:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2020-12-22 19:20:11,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:11,354 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 90, 90, 90, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1] [2020-12-22 19:20:11,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:11,570 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:20:11,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:11,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2047268483, now seen corresponding path program 23 times [2020-12-22 19:20:11,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:11,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275917215] [2020-12-22 19:20:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21692 backedges. 522 proven. 19663 refuted. 0 times theorem prover too weak. 1507 trivial. 0 not checked. [2020-12-22 19:20:12,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275917215] [2020-12-22 19:20:12,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550546260] [2020-12-22 19:20:12,757 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:14,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-22 19:20:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:20:14,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:20:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21692 backedges. 3065 proven. 17110 refuted. 0 times theorem prover too weak. 1517 trivial. 0 not checked. [2020-12-22 19:20:15,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:15,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 48 [2020-12-22 19:20:15,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926150439] [2020-12-22 19:20:16,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 19:20:16,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:16,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 19:20:16,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:20:16,001 INFO L87 Difference]: Start difference. First operand 534 states and 536 transitions. Second operand 48 states. [2020-12-22 19:20:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:23,073 INFO L93 Difference]: Finished difference Result 618 states and 621 transitions. [2020-12-22 19:20:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-12-22 19:20:23,074 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 533 [2020-12-22 19:20:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:23,079 INFO L225 Difference]: With dead ends: 618 [2020-12-22 19:20:23,080 INFO L226 Difference]: Without dead ends: 618 [2020-12-22 19:20:23,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 513 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8379 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4140, Invalid=21942, Unknown=0, NotChecked=0, Total=26082 [2020-12-22 19:20:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-12-22 19:20:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 606. [2020-12-22 19:20:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-12-22 19:20:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 609 transitions. [2020-12-22 19:20:23,093 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 609 transitions. Word has length 533 [2020-12-22 19:20:23,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:23,093 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 609 transitions. [2020-12-22 19:20:23,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 19:20:23,094 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 609 transitions. [2020-12-22 19:20:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2020-12-22 19:20:23,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:23,099 INFO L422 BasicCegarLoop]: trace histogram [103, 103, 102, 102, 102, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1] [2020-12-22 19:20:23,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 19:20:23,314 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:20:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:23,315 INFO L82 PathProgramCache]: Analyzing trace with hash -23883018, now seen corresponding path program 24 times [2020-12-22 19:20:23,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:23,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998455251] [2020-12-22 19:20:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 27771 backedges. 0 proven. 6649 refuted. 0 times theorem prover too weak. 21122 trivial. 0 not checked. [2020-12-22 19:20:25,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998455251] [2020-12-22 19:20:25,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190012652] [2020-12-22 19:20:25,270 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:25,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2020-12-22 19:20:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:20:25,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 19:20:25,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:25,765 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:20:25,766 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:20:25,767 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:20:25,789 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:20:25,790 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:20:25,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:20:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 27771 backedges. 0 proven. 6649 refuted. 0 times theorem prover too weak. 21122 trivial. 0 not checked. [2020-12-22 19:20:27,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:27,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 19:20:27,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056479764] [2020-12-22 19:20:27,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:20:27,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:27,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:20:27,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:20:27,569 INFO L87 Difference]: Start difference. First operand 606 states and 609 transitions. Second operand 19 states. [2020-12-22 19:20:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:28,559 INFO L93 Difference]: Finished difference Result 625 states and 629 transitions. [2020-12-22 19:20:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:20:28,560 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 600 [2020-12-22 19:20:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:28,564 INFO L225 Difference]: With dead ends: 625 [2020-12-22 19:20:28,564 INFO L226 Difference]: Without dead ends: 625 [2020-12-22 19:20:28,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:20:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-12-22 19:20:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 611. [2020-12-22 19:20:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-22 19:20:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 615 transitions. [2020-12-22 19:20:28,575 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 615 transitions. Word has length 600 [2020-12-22 19:20:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:28,575 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 615 transitions. [2020-12-22 19:20:28,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:20:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 615 transitions. [2020-12-22 19:20:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2020-12-22 19:20:28,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:28,581 INFO L422 BasicCegarLoop]: trace histogram [104, 104, 103, 103, 103, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1] [2020-12-22 19:20:28,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 19:20:28,795 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:20:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:28,796 INFO L82 PathProgramCache]: Analyzing trace with hash -359370401, now seen corresponding path program 25 times [2020-12-22 19:20:28,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:28,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536317714] [2020-12-22 19:20:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 28296 backedges. 20194 proven. 6098 refuted. 0 times theorem prover too weak. 2004 trivial. 0 not checked. [2020-12-22 19:20:29,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536317714] [2020-12-22 19:20:29,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773131784] [2020-12-22 19:20:29,876 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:30,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:20:30,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 28296 backedges. 21110 proven. 5182 refuted. 0 times theorem prover too weak. 2004 trivial. 0 not checked. [2020-12-22 19:20:31,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:31,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2020-12-22 19:20:31,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066030064] [2020-12-22 19:20:31,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 19:20:31,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:31,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 19:20:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:20:31,687 INFO L87 Difference]: Start difference. First operand 611 states and 615 transitions. Second operand 41 states. [2020-12-22 19:20:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:36,945 INFO L93 Difference]: Finished difference Result 611 states and 613 transitions. [2020-12-22 19:20:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 19:20:36,946 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 605 [2020-12-22 19:20:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:36,950 INFO L225 Difference]: With dead ends: 611 [2020-12-22 19:20:36,951 INFO L226 Difference]: Without dead ends: 611 [2020-12-22 19:20:36,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5138 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4737, Invalid=12555, Unknown=0, NotChecked=0, Total=17292 [2020-12-22 19:20:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-12-22 19:20:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2020-12-22 19:20:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-22 19:20:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 613 transitions. [2020-12-22 19:20:36,963 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 613 transitions. Word has length 605 [2020-12-22 19:20:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:36,964 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 613 transitions. [2020-12-22 19:20:36,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 19:20:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 613 transitions. [2020-12-22 19:20:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2020-12-22 19:20:36,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:36,970 INFO L422 BasicCegarLoop]: trace histogram [105, 105, 104, 104, 104, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1] [2020-12-22 19:20:37,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:37,184 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:20:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:37,184 INFO L82 PathProgramCache]: Analyzing trace with hash -86629938, now seen corresponding path program 26 times [2020-12-22 19:20:37,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:37,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976075696] [2020-12-22 19:20:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 28826 backedges. 611 proven. 26305 refuted. 0 times theorem prover too weak. 1910 trivial. 0 not checked. [2020-12-22 19:20:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976075696] [2020-12-22 19:20:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867176460] [2020-12-22 19:20:38,350 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:38,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:20:38,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:20:38,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:20:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28826 backedges. 429 proven. 26487 refuted. 0 times theorem prover too weak. 1910 trivial. 0 not checked. [2020-12-22 19:20:41,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:41,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 60 [2020-12-22 19:20:41,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769509786] [2020-12-22 19:20:41,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 19:20:41,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:41,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 19:20:41,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=2903, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 19:20:41,820 INFO L87 Difference]: Start difference. First operand 611 states and 613 transitions. Second operand 60 states. [2020-12-22 19:20:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:51,308 INFO L93 Difference]: Finished difference Result 700 states and 703 transitions. [2020-12-22 19:20:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-12-22 19:20:51,309 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 610 [2020-12-22 19:20:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:51,312 INFO L225 Difference]: With dead ends: 700 [2020-12-22 19:20:51,312 INFO L226 Difference]: Without dead ends: 700 [2020-12-22 19:20:51,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13732 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=7312, Invalid=29744, Unknown=0, NotChecked=0, Total=37056 [2020-12-22 19:20:51,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-12-22 19:20:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 688. [2020-12-22 19:20:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2020-12-22 19:20:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 691 transitions. [2020-12-22 19:20:51,324 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 691 transitions. Word has length 610 [2020-12-22 19:20:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:51,325 INFO L481 AbstractCegarLoop]: Abstraction has 688 states and 691 transitions. [2020-12-22 19:20:51,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 19:20:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 691 transitions. [2020-12-22 19:20:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2020-12-22 19:20:51,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:51,330 INFO L422 BasicCegarLoop]: trace histogram [118, 118, 117, 117, 117, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1] [2020-12-22 19:20:51,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 19:20:51,544 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:20:51,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash 26044842, now seen corresponding path program 27 times [2020-12-22 19:20:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:51,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785363151] [2020-12-22 19:20:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 36374 backedges. 0 proven. 8211 refuted. 0 times theorem prover too weak. 28163 trivial. 0 not checked. [2020-12-22 19:20:53,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785363151] [2020-12-22 19:20:53,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175488434] [2020-12-22 19:20:53,627 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:53,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 19:20:53,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:20:53,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:20:53,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:53,917 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:20:53,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:20:53,920 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:20:53,941 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:20:53,943 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:20:53,943 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:20:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 36374 backedges. 0 proven. 8211 refuted. 0 times theorem prover too weak. 28163 trivial. 0 not checked. [2020-12-22 19:20:56,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:56,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 19:20:56,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198295129] [2020-12-22 19:20:56,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:20:56,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:20:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:20:56,175 INFO L87 Difference]: Start difference. First operand 688 states and 691 transitions. Second operand 20 states. [2020-12-22 19:20:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:57,246 INFO L93 Difference]: Finished difference Result 707 states and 711 transitions. [2020-12-22 19:20:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:20:57,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 682 [2020-12-22 19:20:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:57,251 INFO L225 Difference]: With dead ends: 707 [2020-12-22 19:20:57,251 INFO L226 Difference]: Without dead ends: 707 [2020-12-22 19:20:57,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:20:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-12-22 19:20:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 693. [2020-12-22 19:20:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-12-22 19:20:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 697 transitions. [2020-12-22 19:20:57,261 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 697 transitions. Word has length 682 [2020-12-22 19:20:57,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:57,262 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 697 transitions. [2020-12-22 19:20:57,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:20:57,262 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 697 transitions. [2020-12-22 19:20:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2020-12-22 19:20:57,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:57,269 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 118, 118, 118, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1] [2020-12-22 19:20:57,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:57,484 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:20:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:57,485 INFO L82 PathProgramCache]: Analyzing trace with hash 997763883, now seen corresponding path program 28 times [2020-12-22 19:20:57,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:57,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671652157] [2020-12-22 19:20:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36975 backedges. 26916 proven. 7579 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-12-22 19:20:58,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671652157] [2020-12-22 19:20:58,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589635115] [2020-12-22 19:20:58,943 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:21:00,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:21:00,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:21:00,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:21:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:21:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36975 backedges. 27984 proven. 6511 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-12-22 19:21:01,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:21:01,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2020-12-22 19:21:01,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130511900] [2020-12-22 19:21:01,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 19:21:01,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:21:01,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 19:21:01,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:21:01,875 INFO L87 Difference]: Start difference. First operand 693 states and 697 transitions. Second operand 44 states. [2020-12-22 19:21:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:21:08,623 INFO L93 Difference]: Finished difference Result 693 states and 695 transitions. [2020-12-22 19:21:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-12-22 19:21:08,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 687 [2020-12-22 19:21:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:21:08,627 INFO L225 Difference]: With dead ends: 693 [2020-12-22 19:21:08,627 INFO L226 Difference]: Without dead ends: 693 [2020-12-22 19:21:08,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6710 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6088, Invalid=15964, Unknown=0, NotChecked=0, Total=22052 [2020-12-22 19:21:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-12-22 19:21:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2020-12-22 19:21:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-12-22 19:21:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 695 transitions. [2020-12-22 19:21:08,641 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 695 transitions. Word has length 687 [2020-12-22 19:21:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:21:08,641 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 695 transitions. [2020-12-22 19:21:08,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 19:21:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 695 transitions. [2020-12-22 19:21:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2020-12-22 19:21:08,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:21:08,649 INFO L422 BasicCegarLoop]: trace histogram [120, 120, 119, 119, 119, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1] [2020-12-22 19:21:08,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 19:21:08,864 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:21:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:21:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -176898030, now seen corresponding path program 29 times [2020-12-22 19:21:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:21:08,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397282681] [2020-12-22 19:21:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:21:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:21:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 37581 backedges. 707 proven. 34495 refuted. 0 times theorem prover too weak. 2379 trivial. 0 not checked. [2020-12-22 19:21:10,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397282681] [2020-12-22 19:21:10,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332583476] [2020-12-22 19:21:10,278 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:21:12,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 19:21:12,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:21:12,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:21:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:21:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 37581 backedges. 4083 proven. 31109 refuted. 0 times theorem prover too weak. 2389 trivial. 0 not checked. [2020-12-22 19:21:15,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:21:15,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 36] total 54 [2020-12-22 19:21:15,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437642069] [2020-12-22 19:21:15,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 19:21:15,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:21:15,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 19:21:15,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2293, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 19:21:15,292 INFO L87 Difference]: Start difference. First operand 693 states and 695 transitions. Second operand 54 states. [2020-12-22 19:21:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:21:26,032 INFO L93 Difference]: Finished difference Result 787 states and 790 transitions. [2020-12-22 19:21:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-12-22 19:21:26,033 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 692 [2020-12-22 19:21:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:21:26,037 INFO L225 Difference]: With dead ends: 787 [2020-12-22 19:21:26,038 INFO L226 Difference]: Without dead ends: 787 [2020-12-22 19:21:26,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 670 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13678 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=6163, Invalid=34037, Unknown=0, NotChecked=0, Total=40200 [2020-12-22 19:21:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-12-22 19:21:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 775. [2020-12-22 19:21:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-12-22 19:21:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 778 transitions. [2020-12-22 19:21:26,050 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 778 transitions. Word has length 692 [2020-12-22 19:21:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:21:26,051 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 778 transitions. [2020-12-22 19:21:26,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 19:21:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 778 transitions. [2020-12-22 19:21:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2020-12-22 19:21:26,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:21:26,057 INFO L422 BasicCegarLoop]: trace histogram [134, 134, 133, 133, 133, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1] [2020-12-22 19:21:26,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 19:21:26,273 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:21:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:21:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1448377191, now seen corresponding path program 30 times [2020-12-22 19:21:26,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:21:26,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68684896] [2020-12-22 19:21:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:21:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:21:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 46816 backedges. 0 proven. 9998 refuted. 0 times theorem prover too weak. 36818 trivial. 0 not checked. [2020-12-22 19:21:29,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68684896] [2020-12-22 19:21:29,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41968155] [2020-12-22 19:21:29,062 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:21:30,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 19:21:30,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:21:30,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:21:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:21:30,074 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:21:30,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:21:30,076 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:21:30,107 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:21:30,111 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:21:30,111 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-12-22 19:21:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 46816 backedges. 0 proven. 9998 refuted. 0 times theorem prover too weak. 36818 trivial. 0 not checked. [2020-12-22 19:21:32,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:21:32,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 19:21:32,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463972201] [2020-12-22 19:21:32,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:21:32,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:21:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:21:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:21:32,772 INFO L87 Difference]: Start difference. First operand 775 states and 778 transitions. Second operand 21 states. [2020-12-22 19:21:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:21:34,128 INFO L93 Difference]: Finished difference Result 794 states and 798 transitions. [2020-12-22 19:21:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:21:34,130 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 769 [2020-12-22 19:21:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:21:34,133 INFO L225 Difference]: With dead ends: 794 [2020-12-22 19:21:34,133 INFO L226 Difference]: Without dead ends: 794 [2020-12-22 19:21:34,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:21:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-12-22 19:21:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 780. [2020-12-22 19:21:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-12-22 19:21:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 784 transitions. [2020-12-22 19:21:34,144 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 784 transitions. Word has length 769 [2020-12-22 19:21:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:21:34,145 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 784 transitions. [2020-12-22 19:21:34,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:21:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 784 transitions. [2020-12-22 19:21:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2020-12-22 19:21:34,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:21:34,153 INFO L422 BasicCegarLoop]: trace histogram [135, 135, 134, 134, 134, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1] [2020-12-22 19:21:34,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 19:21:34,366 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:21:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:21:34,367 INFO L82 PathProgramCache]: Analyzing trace with hash 267921294, now seen corresponding path program 31 times [2020-12-22 19:21:34,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:21:34,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13477394] [2020-12-22 19:21:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:21:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:21:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 47498 backedges. 35192 proven. 9279 refuted. 0 times theorem prover too weak. 3027 trivial. 0 not checked. [2020-12-22 19:21:36,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13477394] [2020-12-22 19:21:36,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516120545] [2020-12-22 19:21:36,117 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:21:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:21:36,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:21:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:21:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 47498 backedges. 36423 proven. 8048 refuted. 0 times theorem prover too weak. 3027 trivial. 0 not checked. [2020-12-22 19:21:38,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:21:38,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 47 [2020-12-22 19:21:38,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267984472] [2020-12-22 19:21:38,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 19:21:38,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:21:38,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 19:21:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:21:38,778 INFO L87 Difference]: Start difference. First operand 780 states and 784 transitions. Second operand 47 states. [2020-12-22 19:21:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:21:47,020 INFO L93 Difference]: Finished difference Result 780 states and 782 transitions. [2020-12-22 19:21:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-12-22 19:21:47,022 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 774 [2020-12-22 19:21:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:21:47,026 INFO L225 Difference]: With dead ends: 780 [2020-12-22 19:21:47,026 INFO L226 Difference]: Without dead ends: 780 [2020-12-22 19:21:47,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8620 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7710, Invalid=20012, Unknown=0, NotChecked=0, Total=27722 [2020-12-22 19:21:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-12-22 19:21:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2020-12-22 19:21:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-12-22 19:21:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 782 transitions. [2020-12-22 19:21:47,037 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 782 transitions. Word has length 774 [2020-12-22 19:21:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:21:47,037 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 782 transitions. [2020-12-22 19:21:47,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 19:21:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 782 transitions. [2020-12-22 19:21:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-12-22 19:21:47,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:21:47,045 INFO L422 BasicCegarLoop]: trace histogram [136, 136, 135, 135, 135, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1] [2020-12-22 19:21:47,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 19:21:47,258 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:21:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:21:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1310771967, now seen corresponding path program 32 times [2020-12-22 19:21:47,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:21:47,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65237526] [2020-12-22 19:21:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:21:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:21:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 48185 backedges. 810 proven. 44456 refuted. 0 times theorem prover too weak. 2919 trivial. 0 not checked. [2020-12-22 19:21:49,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65237526] [2020-12-22 19:21:49,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144263103] [2020-12-22 19:21:49,018 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:21:49,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:21:49,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:21:49,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 19:21:49,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:21:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 48185 backedges. 570 proven. 44696 refuted. 0 times theorem prover too weak. 2919 trivial. 0 not checked. [2020-12-22 19:21:53,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:21:53,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 68 [2020-12-22 19:21:53,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494380662] [2020-12-22 19:21:53,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 19:21:53,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:21:53,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 19:21:53,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=3733, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 19:21:53,921 INFO L87 Difference]: Start difference. First operand 780 states and 782 transitions. Second operand 68 states.