/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:50,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:50,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:50,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:19:50,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:19:50,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:19:50,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:19:50,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:19:50,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:19:50,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:19:50,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:19:50,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:19:50,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:19:50,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:19:50,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:19:50,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:19:50,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:19:50,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:19:50,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:19:50,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:19:50,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:19:50,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:19:50,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:19:50,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:19:50,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 21:19:50,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 21:19:50,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 21:19:50,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 21:19:50,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 21:19:50,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 21:19:50,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:19:50,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:19:50,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:19:50,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:19:50,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:19:50,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:19:50,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:19:50,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:19:50,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:50,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:50,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:50,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:50,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:50,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:50,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:50,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:50,924 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:50,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:50,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:50,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:50,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:50,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:50,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:50,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:50,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:50,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:50,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:50,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:50,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:50,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:50,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:50,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:50,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:50,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:51,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:51,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:51,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:51,409 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:51,410 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:51,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2020-12-21 21:19:51,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e28a9e5/039aa0a490c5466c84dcaae1f4725882/FLAG5f88b9db7 [2020-12-21 21:19:52,286 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:52,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2020-12-21 21:19:52,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e28a9e5/039aa0a490c5466c84dcaae1f4725882/FLAG5f88b9db7 [2020-12-21 21:19:52,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e28a9e5/039aa0a490c5466c84dcaae1f4725882 [2020-12-21 21:19:52,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:52,667 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:52,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:52,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:52,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b04d038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52, skipping insertion in model container [2020-12-21 21:19:52,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:52,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:52,866 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2020-12-21 21:19:52,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,899 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:52,914 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2020-12-21 21:19:52,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,948 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:52,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52 WrapperNode [2020-12-21 21:19:52,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:52,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:52,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:52,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:53,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:53,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:53,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:53,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:53,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:53,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:53,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:53,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:53,564 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-21 21:19:53,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53 BoogieIcfgContainer [2020-12-21 21:19:53,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:53,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:53,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:53,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:53,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:52" (1/3) ... [2020-12-21 21:19:53,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e5692a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (2/3) ... [2020-12-21 21:19:53,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e5692a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53" (3/3) ... [2020-12-21 21:19:53,595 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2020-12-21 21:19:53,602 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:53,608 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-21 21:19:53,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-21 21:19:53,652 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:53,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:53,653 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:53,653 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:53,653 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:53,653 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:53,653 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:53,654 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:53,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-21 21:19:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:53,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,678 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,684 INFO L82 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2020-12-21 21:19:53,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105652894] [2020-12-21 21:19:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:53,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105652894] [2020-12-21 21:19:53,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:53,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:19:53,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864322772] [2020-12-21 21:19:53,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:19:53,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:19:53,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:19:53,860 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-21 21:19:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:53,885 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2020-12-21 21:19:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:19:53,887 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-21 21:19:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:53,897 INFO L225 Difference]: With dead ends: 76 [2020-12-21 21:19:53,898 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:19:53,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:19:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:19:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-21 21:19:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:19:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 21:19:53,946 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2020-12-21 21:19:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:53,946 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 21:19:53,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:19:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 21:19:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:53,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:53,948 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2024314673, now seen corresponding path program 1 times [2020-12-21 21:19:53,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872360024] [2020-12-21 21:19:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872360024] [2020-12-21 21:19:54,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:54,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:54,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328959147] [2020-12-21 21:19:54,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:54,025 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-12-21 21:19:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,104 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2020-12-21 21:19:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:19:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,106 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:19:54,106 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 21:19:54,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 21:19:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2020-12-21 21:19:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:19:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-21 21:19:54,115 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2020-12-21 21:19:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,116 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-21 21:19:54,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-21 21:19:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:19:54,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:19:54,117 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2020-12-21 21:19:54,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099862025] [2020-12-21 21:19:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099862025] [2020-12-21 21:19:54,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092719830] [2020-12-21 21:19:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:54,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29535720] [2020-12-21 21:19:54,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,334 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 3 states. [2020-12-21 21:19:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,438 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2020-12-21 21:19:54,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-21 21:19:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,444 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:19:54,444 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:19:54,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:19:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-12-21 21:19:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:19:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-12-21 21:19:54,460 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 14 [2020-12-21 21:19:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,462 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-12-21 21:19:54,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-12-21 21:19:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:19:54,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:19:54,665 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2046810882, now seen corresponding path program 1 times [2020-12-21 21:19:54,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983638293] [2020-12-21 21:19:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983638293] [2020-12-21 21:19:54,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947076187] [2020-12-21 21:19:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:54,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:19:54,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434739683] [2020-12-21 21:19:54,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:19:54,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:19:54,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,881 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 5 states. [2020-12-21 21:19:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,006 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2020-12-21 21:19:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:55,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:19:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,008 INFO L225 Difference]: With dead ends: 133 [2020-12-21 21:19:55,008 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:19:55,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:19:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2020-12-21 21:19:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:19:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2020-12-21 21:19:55,020 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 14 [2020-12-21 21:19:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,021 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2020-12-21 21:19:55,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:19:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2020-12-21 21:19:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:19:55,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,236 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023364, now seen corresponding path program 2 times [2020-12-21 21:19:55,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841272583] [2020-12-21 21:19:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:19:55,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841272583] [2020-12-21 21:19:55,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:55,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:19:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444434015] [2020-12-21 21:19:55,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:19:55,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:19:55,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:55,305 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand 4 states. [2020-12-21 21:19:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,401 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2020-12-21 21:19:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:55,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-21 21:19:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,403 INFO L225 Difference]: With dead ends: 124 [2020-12-21 21:19:55,403 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 21:19:55,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 21:19:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-12-21 21:19:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 21:19:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-12-21 21:19:55,413 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 16 [2020-12-21 21:19:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,414 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-12-21 21:19:55,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:19:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-12-21 21:19:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:19:55,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,415 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 21:19:55,416 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash 851634768, now seen corresponding path program 1 times [2020-12-21 21:19:55,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536600717] [2020-12-21 21:19:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:19:55,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536600717] [2020-12-21 21:19:55,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840889487] [2020-12-21 21:19:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:55,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 21:19:55,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138819818] [2020-12-21 21:19:55,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:19:55,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:19:55,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:55,577 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 8 states. [2020-12-21 21:19:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,731 INFO L93 Difference]: Finished difference Result 198 states and 262 transitions. [2020-12-21 21:19:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:19:55,732 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-21 21:19:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,734 INFO L225 Difference]: With dead ends: 198 [2020-12-21 21:19:55,734 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 21:19:55,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 21:19:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2020-12-21 21:19:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 21:19:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 129 transitions. [2020-12-21 21:19:55,746 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 129 transitions. Word has length 19 [2020-12-21 21:19:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,746 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 129 transitions. [2020-12-21 21:19:55,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:19:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 129 transitions. [2020-12-21 21:19:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:19:55,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,748 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,963 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash -392705404, now seen corresponding path program 2 times [2020-12-21 21:19:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973059784] [2020-12-21 21:19:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:19:56,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973059784] [2020-12-21 21:19:56,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:56,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:19:56,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028092422] [2020-12-21 21:19:56,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:19:56,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:19:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:56,031 INFO L87 Difference]: Start difference. First operand 97 states and 129 transitions. Second operand 4 states. [2020-12-21 21:19:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,085 INFO L93 Difference]: Finished difference Result 165 states and 219 transitions. [2020-12-21 21:19:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:56,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-21 21:19:56,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,086 INFO L225 Difference]: With dead ends: 165 [2020-12-21 21:19:56,087 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 21:19:56,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 21:19:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-12-21 21:19:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:19:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2020-12-21 21:19:56,096 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 24 [2020-12-21 21:19:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,097 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2020-12-21 21:19:56,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:19:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2020-12-21 21:19:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:19:56,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-21 21:19:56,098 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,099 INFO L82 PathProgramCache]: Analyzing trace with hash 709808073, now seen corresponding path program 1 times [2020-12-21 21:19:56,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837549609] [2020-12-21 21:19:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:56,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837549609] [2020-12-21 21:19:56,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852129426] [2020-12-21 21:19:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:56,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:19:56,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770749525] [2020-12-21 21:19:56,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:56,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:56,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:56,255 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 7 states. [2020-12-21 21:19:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,369 INFO L93 Difference]: Finished difference Result 235 states and 307 transitions. [2020-12-21 21:19:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:19:56,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-21 21:19:56,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,371 INFO L225 Difference]: With dead ends: 235 [2020-12-21 21:19:56,371 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 21:19:56,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 21:19:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2020-12-21 21:19:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 21:19:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2020-12-21 21:19:56,406 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 25 [2020-12-21 21:19:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,406 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2020-12-21 21:19:56,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2020-12-21 21:19:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:19:56,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,407 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,621 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,622 INFO L82 PathProgramCache]: Analyzing trace with hash 518766855, now seen corresponding path program 2 times [2020-12-21 21:19:56,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473642001] [2020-12-21 21:19:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:56,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473642001] [2020-12-21 21:19:56,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999889253] [2020-12-21 21:19:56,696 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:56,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:56,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:19:56,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930473356] [2020-12-21 21:19:56,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:19:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:19:56,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,822 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand 8 states. [2020-12-21 21:19:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,969 INFO L93 Difference]: Finished difference Result 285 states and 375 transitions. [2020-12-21 21:19:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:56,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-21 21:19:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,971 INFO L225 Difference]: With dead ends: 285 [2020-12-21 21:19:56,971 INFO L226 Difference]: Without dead ends: 180 [2020-12-21 21:19:56,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-21 21:19:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 140. [2020-12-21 21:19:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-21 21:19:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 189 transitions. [2020-12-21 21:19:56,981 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 189 transitions. Word has length 27 [2020-12-21 21:19:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,982 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 189 transitions. [2020-12-21 21:19:56,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:19:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 189 transitions. [2020-12-21 21:19:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:19:56,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,983 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,198 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1611750085, now seen corresponding path program 3 times [2020-12-21 21:19:57,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953098236] [2020-12-21 21:19:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:57,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953098236] [2020-12-21 21:19:57,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123759274] [2020-12-21 21:19:57,280 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:19:57,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 21:19:57,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:57,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2020-12-21 21:19:57,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681090714] [2020-12-21 21:19:57,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:19:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:19:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=71, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:57,445 INFO L87 Difference]: Start difference. First operand 140 states and 189 transitions. Second operand 6 states. [2020-12-21 21:19:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,548 INFO L93 Difference]: Finished difference Result 270 states and 365 transitions. [2020-12-21 21:19:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:19:57,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-21 21:19:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,553 INFO L225 Difference]: With dead ends: 270 [2020-12-21 21:19:57,554 INFO L226 Difference]: Without dead ends: 159 [2020-12-21 21:19:57,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=85, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:19:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-21 21:19:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2020-12-21 21:19:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 21:19:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 192 transitions. [2020-12-21 21:19:57,571 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 192 transitions. Word has length 29 [2020-12-21 21:19:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,571 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 192 transitions. [2020-12-21 21:19:57,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:19:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 192 transitions. [2020-12-21 21:19:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:19:57,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,575 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,789 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,790 INFO L82 PathProgramCache]: Analyzing trace with hash -163257277, now seen corresponding path program 1 times [2020-12-21 21:19:57,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991528472] [2020-12-21 21:19:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:57,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991528472] [2020-12-21 21:19:57,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982848217] [2020-12-21 21:19:57,893 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 [2020-12-21 21:19:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:58,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:19:58,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194902416] [2020-12-21 21:19:58,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:19:58,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:19:58,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:58,024 INFO L87 Difference]: Start difference. First operand 142 states and 192 transitions. Second operand 9 states. [2020-12-21 21:19:58,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,183 INFO L93 Difference]: Finished difference Result 339 states and 449 transitions. [2020-12-21 21:19:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:19:58,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-21 21:19:58,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,185 INFO L225 Difference]: With dead ends: 339 [2020-12-21 21:19:58,185 INFO L226 Difference]: Without dead ends: 210 [2020-12-21 21:19:58,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-21 21:19:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-12-21 21:19:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-21 21:19:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 226 transitions. [2020-12-21 21:19:58,193 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 226 transitions. Word has length 29 [2020-12-21 21:19:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,194 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 226 transitions. [2020-12-21 21:19:58,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:19:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 226 transitions. [2020-12-21 21:19:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:19:58,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,195 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,410 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2073360767, now seen corresponding path program 2 times [2020-12-21 21:19:58,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018464878] [2020-12-21 21:19:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:58,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018464878] [2020-12-21 21:19:58,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019604624] [2020-12-21 21:19:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:58,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:58,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:58,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:19:58,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845829772] [2020-12-21 21:19:58,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:19:58,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:19:58,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:58,644 INFO L87 Difference]: Start difference. First operand 166 states and 226 transitions. Second operand 10 states. [2020-12-21 21:19:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,849 INFO L93 Difference]: Finished difference Result 389 states and 517 transitions. [2020-12-21 21:19:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:19:58,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-21 21:19:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,853 INFO L225 Difference]: With dead ends: 389 [2020-12-21 21:19:58,853 INFO L226 Difference]: Without dead ends: 238 [2020-12-21 21:19:58,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-21 21:19:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 190. [2020-12-21 21:19:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-21 21:19:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 260 transitions. [2020-12-21 21:19:58,862 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 260 transitions. Word has length 31 [2020-12-21 21:19:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,862 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 260 transitions. [2020-12-21 21:19:58,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:19:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 260 transitions. [2020-12-21 21:19:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:19:58,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,864 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:19:59,078 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,079 INFO L82 PathProgramCache]: Analyzing trace with hash 563188031, now seen corresponding path program 3 times [2020-12-21 21:19:59,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23007967] [2020-12-21 21:19:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:59,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23007967] [2020-12-21 21:19:59,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291391435] [2020-12-21 21:19:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:19:59,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-21 21:19:59,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-21 21:19:59,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460105186] [2020-12-21 21:19:59,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:19:59,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:19:59,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:59,346 INFO L87 Difference]: Start difference. First operand 190 states and 260 transitions. Second operand 14 states. [2020-12-21 21:19:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,666 INFO L93 Difference]: Finished difference Result 465 states and 625 transitions. [2020-12-21 21:19:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:19:59,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-12-21 21:19:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,668 INFO L225 Difference]: With dead ends: 465 [2020-12-21 21:19:59,669 INFO L226 Difference]: Without dead ends: 292 [2020-12-21 21:19:59,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=233, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:19:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-21 21:19:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 226. [2020-12-21 21:19:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-21 21:19:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 309 transitions. [2020-12-21 21:19:59,679 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 309 transitions. Word has length 33 [2020-12-21 21:19:59,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,679 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 309 transitions. [2020-12-21 21:19:59,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:19:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 309 transitions. [2020-12-21 21:19:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:19:59,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,680 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,893 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash -195397689, now seen corresponding path program 4 times [2020-12-21 21:19:59,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869791834] [2020-12-21 21:19:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:20:00,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869791834] [2020-12-21 21:20:00,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706542644] [2020-12-21 21:20:00,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:00,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:20:00,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:20:00,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19676929] [2020-12-21 21:20:00,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:20:00,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:20:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:20:00,178 INFO L87 Difference]: Start difference. First operand 226 states and 309 transitions. Second operand 12 states. [2020-12-21 21:20:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,424 INFO L93 Difference]: Finished difference Result 513 states and 683 transitions. [2020-12-21 21:20:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:20:00,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-12-21 21:20:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,430 INFO L225 Difference]: With dead ends: 513 [2020-12-21 21:20:00,430 INFO L226 Difference]: Without dead ends: 306 [2020-12-21 21:20:00,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:20:00,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-21 21:20:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 250. [2020-12-21 21:20:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-21 21:20:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 343 transitions. [2020-12-21 21:20:00,448 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 343 transitions. Word has length 38 [2020-12-21 21:20:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,448 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 343 transitions. [2020-12-21 21:20:00,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:20:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 343 transitions. [2020-12-21 21:20:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:20:00,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,453 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,669 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,671 INFO L82 PathProgramCache]: Analyzing trace with hash -607913143, now seen corresponding path program 5 times [2020-12-21 21:20:00,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286204146] [2020-12-21 21:20:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:20:00,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286204146] [2020-12-21 21:20:00,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102114440] [2020-12-21 21:20:00,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-21 21:20:00,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:20:01,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:20:01,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485504843] [2020-12-21 21:20:01,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:20:01,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:20:01,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:01,008 INFO L87 Difference]: Start difference. First operand 250 states and 343 transitions. Second operand 13 states. [2020-12-21 21:20:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,266 INFO L93 Difference]: Finished difference Result 563 states and 751 transitions. [2020-12-21 21:20:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:20:01,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-12-21 21:20:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,268 INFO L225 Difference]: With dead ends: 563 [2020-12-21 21:20:01,268 INFO L226 Difference]: Without dead ends: 334 [2020-12-21 21:20:01,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-21 21:20:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 274. [2020-12-21 21:20:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-21 21:20:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 377 transitions. [2020-12-21 21:20:01,280 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 377 transitions. Word has length 40 [2020-12-21 21:20:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,280 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 377 transitions. [2020-12-21 21:20:01,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:20:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 377 transitions. [2020-12-21 21:20:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 21:20:01,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,281 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:20:01,497 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1898273205, now seen corresponding path program 6 times [2020-12-21 21:20:01,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965178971] [2020-12-21 21:20:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:20:01,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965178971] [2020-12-21 21:20:01,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831147250] [2020-12-21 21:20:01,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:20:01,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:20:01,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-21 21:20:01,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56735277] [2020-12-21 21:20:01,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:01,865 INFO L87 Difference]: Start difference. First operand 274 states and 377 transitions. Second operand 18 states. [2020-12-21 21:20:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,296 INFO L93 Difference]: Finished difference Result 649 states and 875 transitions. [2020-12-21 21:20:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:20:02,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-12-21 21:20:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,299 INFO L225 Difference]: With dead ends: 649 [2020-12-21 21:20:02,299 INFO L226 Difference]: Without dead ends: 398 [2020-12-21 21:20:02,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:20:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-21 21:20:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 316. [2020-12-21 21:20:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-12-21 21:20:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 434 transitions. [2020-12-21 21:20:02,315 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 434 transitions. Word has length 42 [2020-12-21 21:20:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,315 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 434 transitions. [2020-12-21 21:20:02,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 434 transitions. [2020-12-21 21:20:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:20:02,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,316 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:02,532 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash -818929289, now seen corresponding path program 7 times [2020-12-21 21:20:02,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107849614] [2020-12-21 21:20:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:20:02,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107849614] [2020-12-21 21:20:02,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75496922] [2020-12-21 21:20:02,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:20:02,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:20:02,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888653999] [2020-12-21 21:20:02,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:20:02,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:20:02,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:20:02,831 INFO L87 Difference]: Start difference. First operand 316 states and 434 transitions. Second operand 15 states. [2020-12-21 21:20:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,122 INFO L93 Difference]: Finished difference Result 699 states and 933 transitions. [2020-12-21 21:20:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:20:03,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-12-21 21:20:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,124 INFO L225 Difference]: With dead ends: 699 [2020-12-21 21:20:03,125 INFO L226 Difference]: Without dead ends: 408 [2020-12-21 21:20:03,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:20:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-12-21 21:20:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 340. [2020-12-21 21:20:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-12-21 21:20:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 468 transitions. [2020-12-21 21:20:03,138 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 468 transitions. Word has length 47 [2020-12-21 21:20:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,139 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 468 transitions. [2020-12-21 21:20:03,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:20:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 468 transitions. [2020-12-21 21:20:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:20:03,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,140 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:03,353 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash -803901387, now seen corresponding path program 8 times [2020-12-21 21:20:03,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611019269] [2020-12-21 21:20:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:20:03,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611019269] [2020-12-21 21:20:03,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28068323] [2020-12-21 21:20:03,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:03,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:20:03,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:20:03,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801222257] [2020-12-21 21:20:03,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:20:03,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:20:03,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:03,658 INFO L87 Difference]: Start difference. First operand 340 states and 468 transitions. Second operand 16 states. [2020-12-21 21:20:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,981 INFO L93 Difference]: Finished difference Result 749 states and 1001 transitions. [2020-12-21 21:20:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:20:03,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-12-21 21:20:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,985 INFO L225 Difference]: With dead ends: 749 [2020-12-21 21:20:03,985 INFO L226 Difference]: Without dead ends: 436 [2020-12-21 21:20:03,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-12-21 21:20:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 364. [2020-12-21 21:20:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-12-21 21:20:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 502 transitions. [2020-12-21 21:20:04,001 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 502 transitions. Word has length 49 [2020-12-21 21:20:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,001 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 502 transitions. [2020-12-21 21:20:04,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:20:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 502 transitions. [2020-12-21 21:20:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:20:04,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,002 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,216 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash 753010547, now seen corresponding path program 9 times [2020-12-21 21:20:04,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905762370] [2020-12-21 21:20:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:20:04,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905762370] [2020-12-21 21:20:04,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251020852] [2020-12-21 21:20:04,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:20:04,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-21 21:20:04,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2020-12-21 21:20:04,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87579928] [2020-12-21 21:20:04,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:20:04,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:20:04,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:04,646 INFO L87 Difference]: Start difference. First operand 364 states and 502 transitions. Second operand 22 states. [2020-12-21 21:20:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:05,332 INFO L93 Difference]: Finished difference Result 845 states and 1141 transitions. [2020-12-21 21:20:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:05,332 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-12-21 21:20:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:05,335 INFO L225 Difference]: With dead ends: 845 [2020-12-21 21:20:05,335 INFO L226 Difference]: Without dead ends: 510 [2020-12-21 21:20:05,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=506, Invalid=826, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-21 21:20:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 412. [2020-12-21 21:20:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-12-21 21:20:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 567 transitions. [2020-12-21 21:20:05,354 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 567 transitions. Word has length 51 [2020-12-21 21:20:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:05,355 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 567 transitions. [2020-12-21 21:20:05,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:20:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 567 transitions. [2020-12-21 21:20:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:20:05,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:05,356 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,568 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash 158574739, now seen corresponding path program 10 times [2020-12-21 21:20:05,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276930085] [2020-12-21 21:20:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:05,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276930085] [2020-12-21 21:20:05,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888464202] [2020-12-21 21:20:05,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:05,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:05,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:20:05,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518151945] [2020-12-21 21:20:05,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:05,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:05,924 INFO L87 Difference]: Start difference. First operand 412 states and 567 transitions. Second operand 18 states. [2020-12-21 21:20:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,330 INFO L93 Difference]: Finished difference Result 897 states and 1199 transitions. [2020-12-21 21:20:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:20:06,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-12-21 21:20:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,334 INFO L225 Difference]: With dead ends: 897 [2020-12-21 21:20:06,334 INFO L226 Difference]: Without dead ends: 516 [2020-12-21 21:20:06,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-12-21 21:20:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2020-12-21 21:20:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-12-21 21:20:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 601 transitions. [2020-12-21 21:20:06,352 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 601 transitions. Word has length 56 [2020-12-21 21:20:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,352 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 601 transitions. [2020-12-21 21:20:06,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 601 transitions. [2020-12-21 21:20:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:20:06,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,353 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,565 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,566 INFO L82 PathProgramCache]: Analyzing trace with hash -383250539, now seen corresponding path program 11 times [2020-12-21 21:20:06,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568321740] [2020-12-21 21:20:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:06,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568321740] [2020-12-21 21:20:06,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352253758] [2020-12-21 21:20:06,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:07,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-21 21:20:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:07,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:07,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:20:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642892156] [2020-12-21 21:20:07,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:20:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:20:07,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:07,194 INFO L87 Difference]: Start difference. First operand 436 states and 601 transitions. Second operand 19 states. [2020-12-21 21:20:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,603 INFO L93 Difference]: Finished difference Result 947 states and 1267 transitions. [2020-12-21 21:20:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:07,603 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-12-21 21:20:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,607 INFO L225 Difference]: With dead ends: 947 [2020-12-21 21:20:07,607 INFO L226 Difference]: Without dead ends: 544 [2020-12-21 21:20:07,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-12-21 21:20:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 460. [2020-12-21 21:20:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-12-21 21:20:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 635 transitions. [2020-12-21 21:20:07,633 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 635 transitions. Word has length 58 [2020-12-21 21:20:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,633 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 635 transitions. [2020-12-21 21:20:07,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:20:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 635 transitions. [2020-12-21 21:20:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:20:07,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,634 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:20:07,848 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1386299881, now seen corresponding path program 12 times [2020-12-21 21:20:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275749902] [2020-12-21 21:20:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:08,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275749902] [2020-12-21 21:20:08,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339359974] [2020-12-21 21:20:08,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-21 21:20:08,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:08,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-21 21:20:08,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2020-12-21 21:20:08,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086206457] [2020-12-21 21:20:08,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:08,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:08,478 INFO L87 Difference]: Start difference. First operand 460 states and 635 transitions. Second operand 26 states. [2020-12-21 21:20:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:09,338 INFO L93 Difference]: Finished difference Result 1053 states and 1423 transitions. [2020-12-21 21:20:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:20:09,339 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-12-21 21:20:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:09,342 INFO L225 Difference]: With dead ends: 1053 [2020-12-21 21:20:09,342 INFO L226 Difference]: Without dead ends: 628 [2020-12-21 21:20:09,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=818, Invalid=1344, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:20:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-12-21 21:20:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 514. [2020-12-21 21:20:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-12-21 21:20:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 708 transitions. [2020-12-21 21:20:09,364 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 708 transitions. Word has length 60 [2020-12-21 21:20:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:09,364 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 708 transitions. [2020-12-21 21:20:09,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 708 transitions. [2020-12-21 21:20:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:20:09,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:09,365 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:09,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:20:09,566 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1730964821, now seen corresponding path program 13 times [2020-12-21 21:20:09,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:09,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037002426] [2020-12-21 21:20:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:09,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037002426] [2020-12-21 21:20:09,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421049184] [2020-12-21 21:20:09,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:20:09,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:10,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:10,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:20:10,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44550849] [2020-12-21 21:20:10,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:10,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:10,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:10,059 INFO L87 Difference]: Start difference. First operand 514 states and 708 transitions. Second operand 21 states. [2020-12-21 21:20:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:10,555 INFO L93 Difference]: Finished difference Result 1107 states and 1481 transitions. [2020-12-21 21:20:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:20:10,556 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-12-21 21:20:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:10,562 INFO L225 Difference]: With dead ends: 1107 [2020-12-21 21:20:10,563 INFO L226 Difference]: Without dead ends: 630 [2020-12-21 21:20:10,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-12-21 21:20:10,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 538. [2020-12-21 21:20:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-12-21 21:20:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 742 transitions. [2020-12-21 21:20:10,587 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 742 transitions. Word has length 65 [2020-12-21 21:20:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:10,587 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 742 transitions. [2020-12-21 21:20:10,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:10,587 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 742 transitions. [2020-12-21 21:20:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:20:10,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:10,588 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:10,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:20:10,803 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:10,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1732907543, now seen corresponding path program 14 times [2020-12-21 21:20:10,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:10,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349208766] [2020-12-21 21:20:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:11,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349208766] [2020-12-21 21:20:11,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974012857] [2020-12-21 21:20:11,117 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:11,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:11,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:20:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:11,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:11,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:20:11,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42611898] [2020-12-21 21:20:11,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:20:11,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:11,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:20:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:11,303 INFO L87 Difference]: Start difference. First operand 538 states and 742 transitions. Second operand 22 states. [2020-12-21 21:20:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:11,796 INFO L93 Difference]: Finished difference Result 1157 states and 1549 transitions. [2020-12-21 21:20:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:11,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-21 21:20:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:11,799 INFO L225 Difference]: With dead ends: 1157 [2020-12-21 21:20:11,799 INFO L226 Difference]: Without dead ends: 658 [2020-12-21 21:20:11,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-12-21 21:20:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 562. [2020-12-21 21:20:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-12-21 21:20:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 776 transitions. [2020-12-21 21:20:11,823 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 776 transitions. Word has length 67 [2020-12-21 21:20:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:11,823 INFO L481 AbstractCegarLoop]: Abstraction has 562 states and 776 transitions. [2020-12-21 21:20:11,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:20:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 776 transitions. [2020-12-21 21:20:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:20:11,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:11,824 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:12,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:20:12,038 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash 695103911, now seen corresponding path program 15 times [2020-12-21 21:20:12,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:12,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508453539] [2020-12-21 21:20:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:12,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508453539] [2020-12-21 21:20:12,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941108631] [2020-12-21 21:20:12,367 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:12,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:20:12,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:12,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:20:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:20:12,705 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:20:12,706 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 10 [2020-12-21 21:20:12,708 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:20:12,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:20:12,713 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:20:12,713 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:7 [2020-12-21 21:20:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2020-12-21 21:20:12,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:12,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2020-12-21 21:20:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094147589] [2020-12-21 21:20:12,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:12,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=438, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:12,749 INFO L87 Difference]: Start difference. First operand 562 states and 776 transitions. Second operand 29 states. [2020-12-21 21:20:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:13,859 INFO L93 Difference]: Finished difference Result 1208 states and 1618 transitions. [2020-12-21 21:20:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:20:13,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2020-12-21 21:20:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:13,862 INFO L225 Difference]: With dead ends: 1208 [2020-12-21 21:20:13,862 INFO L226 Difference]: Without dead ends: 687 [2020-12-21 21:20:13,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=977, Invalid=1473, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:20:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-12-21 21:20:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 586. [2020-12-21 21:20:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-12-21 21:20:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 809 transitions. [2020-12-21 21:20:13,888 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 809 transitions. Word has length 69 [2020-12-21 21:20:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:13,888 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 809 transitions. [2020-12-21 21:20:13,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 809 transitions. [2020-12-21 21:20:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:20:13,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:13,889 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:14,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:20:14,099 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2065724195, now seen corresponding path program 1 times [2020-12-21 21:20:14,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:14,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133227946] [2020-12-21 21:20:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:14,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133227946] [2020-12-21 21:20:14,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178855035] [2020-12-21 21:20:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:20:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:14,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:14,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:20:14,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39549824] [2020-12-21 21:20:14,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:20:14,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:14,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:20:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:14,665 INFO L87 Difference]: Start difference. First operand 586 states and 809 transitions. Second operand 24 states. [2020-12-21 21:20:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:15,237 INFO L93 Difference]: Finished difference Result 1257 states and 1683 transitions. [2020-12-21 21:20:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:20:15,238 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-12-21 21:20:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:15,241 INFO L225 Difference]: With dead ends: 1257 [2020-12-21 21:20:15,241 INFO L226 Difference]: Without dead ends: 714 [2020-12-21 21:20:15,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-12-21 21:20:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 610. [2020-12-21 21:20:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-12-21 21:20:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 843 transitions. [2020-12-21 21:20:15,266 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 843 transitions. Word has length 71 [2020-12-21 21:20:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:15,266 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 843 transitions. [2020-12-21 21:20:15,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:20:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 843 transitions. [2020-12-21 21:20:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:20:15,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:15,267 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:15,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:15,482 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash 810870753, now seen corresponding path program 2 times [2020-12-21 21:20:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:15,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533243758] [2020-12-21 21:20:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:15,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533243758] [2020-12-21 21:20:15,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337856287] [2020-12-21 21:20:15,863 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:15,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:15,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:15,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:20:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:16,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:16,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:20:16,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714307964] [2020-12-21 21:20:16,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:20:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:20:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:20:16,064 INFO L87 Difference]: Start difference. First operand 610 states and 843 transitions. Second operand 25 states. [2020-12-21 21:20:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:16,630 INFO L93 Difference]: Finished difference Result 1307 states and 1751 transitions. [2020-12-21 21:20:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:20:16,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-12-21 21:20:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:16,636 INFO L225 Difference]: With dead ends: 1307 [2020-12-21 21:20:16,636 INFO L226 Difference]: Without dead ends: 742 [2020-12-21 21:20:16,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:20:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2020-12-21 21:20:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 634. [2020-12-21 21:20:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2020-12-21 21:20:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 877 transitions. [2020-12-21 21:20:16,662 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 877 transitions. Word has length 73 [2020-12-21 21:20:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:16,663 INFO L481 AbstractCegarLoop]: Abstraction has 634 states and 877 transitions. [2020-12-21 21:20:16,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:20:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 877 transitions. [2020-12-21 21:20:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:20:16,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:16,663 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:16,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:20:16,877 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1782523167, now seen corresponding path program 3 times [2020-12-21 21:20:16,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:16,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098468385] [2020-12-21 21:20:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:17,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098468385] [2020-12-21 21:20:17,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350017090] [2020-12-21 21:20:17,281 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 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 [2020-12-21 21:20:17,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:20:17,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-21 21:20:17,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:17,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2020-12-21 21:20:17,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64890759] [2020-12-21 21:20:17,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:20:17,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:17,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:20:17,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:17,701 INFO L87 Difference]: Start difference. First operand 634 states and 877 transitions. Second operand 33 states. [2020-12-21 21:20:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:18,999 INFO L93 Difference]: Finished difference Result 1423 states and 1923 transitions. [2020-12-21 21:20:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 21:20:19,000 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-12-21 21:20:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:19,003 INFO L225 Difference]: With dead ends: 1423 [2020-12-21 21:20:19,004 INFO L226 Difference]: Without dead ends: 836 [2020-12-21 21:20:19,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1403, Invalid=2257, Unknown=0, NotChecked=0, Total=3660 [2020-12-21 21:20:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-12-21 21:20:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 694. [2020-12-21 21:20:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-12-21 21:20:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 958 transitions. [2020-12-21 21:20:19,046 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 958 transitions. Word has length 75 [2020-12-21 21:20:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:19,046 INFO L481 AbstractCegarLoop]: Abstraction has 694 states and 958 transitions. [2020-12-21 21:20:19,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:20:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 958 transitions. [2020-12-21 21:20:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 21:20:19,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:19,047 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:19,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:19,260 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:19,261 INFO L82 PathProgramCache]: Analyzing trace with hash 300791143, now seen corresponding path program 4 times [2020-12-21 21:20:19,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:19,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079670968] [2020-12-21 21:20:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:19,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079670968] [2020-12-21 21:20:19,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718257964] [2020-12-21 21:20:19,717 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 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 [2020-12-21 21:20:19,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:19,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:20:19,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:19,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:19,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:20:19,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574869859] [2020-12-21 21:20:19,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:20:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:20:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:19,968 INFO L87 Difference]: Start difference. First operand 694 states and 958 transitions. Second operand 27 states. [2020-12-21 21:20:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:20,643 INFO L93 Difference]: Finished difference Result 1479 states and 1981 transitions. [2020-12-21 21:20:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:20,644 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 80 [2020-12-21 21:20:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:20,647 INFO L225 Difference]: With dead ends: 1479 [2020-12-21 21:20:20,647 INFO L226 Difference]: Without dead ends: 834 [2020-12-21 21:20:20,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2020-12-21 21:20:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 718. [2020-12-21 21:20:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-12-21 21:20:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 992 transitions. [2020-12-21 21:20:20,673 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 992 transitions. Word has length 80 [2020-12-21 21:20:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:20,673 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 992 transitions. [2020-12-21 21:20:20,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:20:20,673 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 992 transitions. [2020-12-21 21:20:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:20:20,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:20,674 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:20,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:20:20,888 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1929529751, now seen corresponding path program 5 times [2020-12-21 21:20:20,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:20,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272027691] [2020-12-21 21:20:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:21,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272027691] [2020-12-21 21:20:21,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789829188] [2020-12-21 21:20:21,328 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 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 [2020-12-21 21:20:22,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-21 21:20:22,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:20:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:22,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:22,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:20:22,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448292744] [2020-12-21 21:20:22,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:20:22,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:22,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:20:22,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:20:22,285 INFO L87 Difference]: Start difference. First operand 718 states and 992 transitions. Second operand 28 states. [2020-12-21 21:20:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:23,022 INFO L93 Difference]: Finished difference Result 1529 states and 2049 transitions. [2020-12-21 21:20:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:20:23,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2020-12-21 21:20:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:23,027 INFO L225 Difference]: With dead ends: 1529 [2020-12-21 21:20:23,028 INFO L226 Difference]: Without dead ends: 862 [2020-12-21 21:20:23,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:20:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2020-12-21 21:20:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 742. [2020-12-21 21:20:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-12-21 21:20:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1026 transitions. [2020-12-21 21:20:23,061 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1026 transitions. Word has length 82 [2020-12-21 21:20:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:23,061 INFO L481 AbstractCegarLoop]: Abstraction has 742 states and 1026 transitions. [2020-12-21 21:20:23,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:20:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1026 transitions. [2020-12-21 21:20:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:20:23,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:23,062 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:23,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:23,275 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:23,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:23,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2079228181, now seen corresponding path program 6 times [2020-12-21 21:20:23,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:23,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015402222] [2020-12-21 21:20:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:23,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015402222] [2020-12-21 21:20:23,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178600538] [2020-12-21 21:20:23,776 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 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 [2020-12-21 21:20:24,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-21 21:20:24,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:24,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:20:24,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-12-21 21:20:24,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:24,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2020-12-21 21:20:24,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069545459] [2020-12-21 21:20:24,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:20:24,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:24,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:20:24,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:24,357 INFO L87 Difference]: Start difference. First operand 742 states and 1026 transitions. Second operand 37 states. [2020-12-21 21:20:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:26,066 INFO L93 Difference]: Finished difference Result 1655 states and 2237 transitions. [2020-12-21 21:20:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-21 21:20:26,066 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-12-21 21:20:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:26,070 INFO L225 Difference]: With dead ends: 1655 [2020-12-21 21:20:26,070 INFO L226 Difference]: Without dead ends: 966 [2020-12-21 21:20:26,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2006, Invalid=3250, Unknown=0, NotChecked=0, Total=5256 [2020-12-21 21:20:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2020-12-21 21:20:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 808. [2020-12-21 21:20:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2020-12-21 21:20:26,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1115 transitions. [2020-12-21 21:20:26,103 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1115 transitions. Word has length 84 [2020-12-21 21:20:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:26,103 INFO L481 AbstractCegarLoop]: Abstraction has 808 states and 1115 transitions. [2020-12-21 21:20:26,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:20:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1115 transitions. [2020-12-21 21:20:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:20:26,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:26,105 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:26,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:20:26,320 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:26,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1312008361, now seen corresponding path program 7 times [2020-12-21 21:20:26,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:26,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598356096] [2020-12-21 21:20:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:20:26,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598356096] [2020-12-21 21:20:26,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664391515] [2020-12-21 21:20:26,881 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 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 [2020-12-21 21:20:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:26,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:20:26,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:20:27,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:27,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:20:27,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284641659] [2020-12-21 21:20:27,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:20:27,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:27,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:20:27,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:27,099 INFO L87 Difference]: Start difference. First operand 808 states and 1115 transitions. Second operand 30 states. [2020-12-21 21:20:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:27,819 INFO L93 Difference]: Finished difference Result 1713 states and 2295 transitions. [2020-12-21 21:20:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:20:27,819 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 89 [2020-12-21 21:20:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:27,824 INFO L225 Difference]: With dead ends: 1713 [2020-12-21 21:20:27,824 INFO L226 Difference]: Without dead ends: 960 [2020-12-21 21:20:27,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2020-12-21 21:20:27,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 832. [2020-12-21 21:20:27,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2020-12-21 21:20:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1149 transitions. [2020-12-21 21:20:27,854 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1149 transitions. Word has length 89 [2020-12-21 21:20:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:27,855 INFO L481 AbstractCegarLoop]: Abstraction has 832 states and 1149 transitions. [2020-12-21 21:20:27,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:20:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1149 transitions. [2020-12-21 21:20:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:20:27,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:27,856 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:28,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:28,070 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash -624928619, now seen corresponding path program 8 times [2020-12-21 21:20:28,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:28,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870519474] [2020-12-21 21:20:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:20:28,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870519474] [2020-12-21 21:20:28,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367160794] [2020-12-21 21:20:28,668 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 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 [2020-12-21 21:20:28,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:28,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:28,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 21:20:28,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:20:28,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:28,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-21 21:20:28,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845030317] [2020-12-21 21:20:28,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:20:28,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:28,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:20:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:28,872 INFO L87 Difference]: Start difference. First operand 832 states and 1149 transitions. Second operand 31 states. [2020-12-21 21:20:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:29,661 INFO L93 Difference]: Finished difference Result 1763 states and 2363 transitions. [2020-12-21 21:20:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:20:29,661 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-12-21 21:20:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:29,664 INFO L225 Difference]: With dead ends: 1763 [2020-12-21 21:20:29,664 INFO L226 Difference]: Without dead ends: 988 [2020-12-21 21:20:29,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2020-12-21 21:20:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 856. [2020-12-21 21:20:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2020-12-21 21:20:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1183 transitions. [2020-12-21 21:20:29,696 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1183 transitions. Word has length 91 [2020-12-21 21:20:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:29,696 INFO L481 AbstractCegarLoop]: Abstraction has 856 states and 1183 transitions. [2020-12-21 21:20:29,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:20:29,696 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1183 transitions. [2020-12-21 21:20:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 21:20:29,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:29,697 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:29,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:20:29,912 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1766260141, now seen corresponding path program 9 times [2020-12-21 21:20:29,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:29,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284100553] [2020-12-21 21:20:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:20:30,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284100553] [2020-12-21 21:20:30,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3919827] [2020-12-21 21:20:30,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:20:30,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:20:30,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:30,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-12-21 21:20:30,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:31,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2020-12-21 21:20:31,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130494582] [2020-12-21 21:20:31,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:20:31,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:31,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:20:31,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:20:31,002 INFO L87 Difference]: Start difference. First operand 856 states and 1183 transitions. Second operand 41 states. [2020-12-21 21:20:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:33,279 INFO L93 Difference]: Finished difference Result 1899 states and 2567 transitions. [2020-12-21 21:20:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-21 21:20:33,280 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 93 [2020-12-21 21:20:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:33,283 INFO L225 Difference]: With dead ends: 1899 [2020-12-21 21:20:33,284 INFO L226 Difference]: Without dead ends: 1102 [2020-12-21 21:20:33,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2779, Invalid=4531, Unknown=0, NotChecked=0, Total=7310 [2020-12-21 21:20:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2020-12-21 21:20:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 928. [2020-12-21 21:20:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 928 states. [2020-12-21 21:20:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1280 transitions. [2020-12-21 21:20:33,321 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1280 transitions. Word has length 93 [2020-12-21 21:20:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:33,322 INFO L481 AbstractCegarLoop]: Abstraction has 928 states and 1280 transitions. [2020-12-21 21:20:33,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:20:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1280 transitions. [2020-12-21 21:20:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-21 21:20:33,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:33,323 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:33,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:33,538 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2015117517, now seen corresponding path program 10 times [2020-12-21 21:20:33,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:33,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215023553] [2020-12-21 21:20:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:20:34,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215023553] [2020-12-21 21:20:34,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66346842] [2020-12-21 21:20:34,212 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 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 [2020-12-21 21:20:34,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 21:20:34,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:20:34,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:34,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-21 21:20:34,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980789377] [2020-12-21 21:20:34,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:20:34,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:34,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:20:34,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:34,445 INFO L87 Difference]: Start difference. First operand 928 states and 1280 transitions. Second operand 33 states. [2020-12-21 21:20:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:35,358 INFO L93 Difference]: Finished difference Result 1959 states and 2625 transitions. [2020-12-21 21:20:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:20:35,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 98 [2020-12-21 21:20:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:35,362 INFO L225 Difference]: With dead ends: 1959 [2020-12-21 21:20:35,362 INFO L226 Difference]: Without dead ends: 1092 [2020-12-21 21:20:35,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2020-12-21 21:20:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 952. [2020-12-21 21:20:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2020-12-21 21:20:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1314 transitions. [2020-12-21 21:20:35,399 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1314 transitions. Word has length 98 [2020-12-21 21:20:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:35,399 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1314 transitions. [2020-12-21 21:20:35,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:20:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1314 transitions. [2020-12-21 21:20:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-21 21:20:35,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:35,400 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:35,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:20:35,614 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1532345419, now seen corresponding path program 11 times [2020-12-21 21:20:35,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:35,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811827511] [2020-12-21 21:20:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:20:36,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811827511] [2020-12-21 21:20:36,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356868269] [2020-12-21 21:20:36,345 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 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 [2020-12-21 21:20:37,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-21 21:20:37,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 21:20:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:20:37,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:37,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-21 21:20:37,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306252338] [2020-12-21 21:20:37,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:20:37,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:20:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:20:37,802 INFO L87 Difference]: Start difference. First operand 952 states and 1314 transitions. Second operand 34 states. [2020-12-21 21:20:38,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:38,739 INFO L93 Difference]: Finished difference Result 2009 states and 2693 transitions. [2020-12-21 21:20:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:20:38,740 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2020-12-21 21:20:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:38,743 INFO L225 Difference]: With dead ends: 2009 [2020-12-21 21:20:38,743 INFO L226 Difference]: Without dead ends: 1120 [2020-12-21 21:20:38,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:20:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2020-12-21 21:20:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 976. [2020-12-21 21:20:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-12-21 21:20:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1348 transitions. [2020-12-21 21:20:38,779 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1348 transitions. Word has length 100 [2020-12-21 21:20:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:38,780 INFO L481 AbstractCegarLoop]: Abstraction has 976 states and 1348 transitions. [2020-12-21 21:20:38,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:20:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1348 transitions. [2020-12-21 21:20:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-21 21:20:38,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:38,781 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:38,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:20:38,996 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1444827209, now seen corresponding path program 12 times [2020-12-21 21:20:38,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:38,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120553841] [2020-12-21 21:20:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:20:39,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120553841] [2020-12-21 21:20:39,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773714674] [2020-12-21 21:20:39,751 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 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 [2020-12-21 21:20:40,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:20:40,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:40,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-21 21:20:40,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:40,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 15] total 47 [2020-12-21 21:20:40,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632604382] [2020-12-21 21:20:40,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:20:40,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:40,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:20:40,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:20:40,979 INFO L87 Difference]: Start difference. First operand 976 states and 1348 transitions. Second operand 47 states. [2020-12-21 21:20:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:43,885 INFO L93 Difference]: Finished difference Result 2157 states and 2917 transitions. [2020-12-21 21:20:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-21 21:20:43,886 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-12-21 21:20:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:43,890 INFO L225 Difference]: With dead ends: 2157 [2020-12-21 21:20:43,890 INFO L226 Difference]: Without dead ends: 1246 [2020-12-21 21:20:43,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3931, Invalid=6371, Unknown=0, NotChecked=0, Total=10302 [2020-12-21 21:20:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2020-12-21 21:20:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1078. [2020-12-21 21:20:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1078 states. [2020-12-21 21:20:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1487 transitions. [2020-12-21 21:20:43,954 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1487 transitions. Word has length 102 [2020-12-21 21:20:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:43,955 INFO L481 AbstractCegarLoop]: Abstraction has 1078 states and 1487 transitions. [2020-12-21 21:20:43,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:20:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1487 transitions. [2020-12-21 21:20:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-21 21:20:43,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:43,956 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:44,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:20:44,171 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash 769318217, now seen corresponding path program 13 times [2020-12-21 21:20:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:44,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978243531] [2020-12-21 21:20:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:20:44,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978243531] [2020-12-21 21:20:44,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968880152] [2020-12-21 21:20:44,961 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 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 [2020-12-21 21:20:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:20:45,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:20:45,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:45,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-21 21:20:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9328653] [2020-12-21 21:20:45,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:20:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:45,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:20:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:45,193 INFO L87 Difference]: Start difference. First operand 1078 states and 1487 transitions. Second operand 37 states. [2020-12-21 21:20:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:46,220 INFO L93 Difference]: Finished difference Result 2267 states and 3039 transitions. [2020-12-21 21:20:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:20:46,220 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-12-21 21:20:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:46,224 INFO L225 Difference]: With dead ends: 2267 [2020-12-21 21:20:46,224 INFO L226 Difference]: Without dead ends: 1258 [2020-12-21 21:20:46,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-12-21 21:20:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1102. [2020-12-21 21:20:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-12-21 21:20:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1521 transitions. [2020-12-21 21:20:46,264 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1521 transitions. Word has length 109 [2020-12-21 21:20:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:46,264 INFO L481 AbstractCegarLoop]: Abstraction has 1102 states and 1521 transitions. [2020-12-21 21:20:46,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:20:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1521 transitions. [2020-12-21 21:20:46,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 21:20:46,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:46,266 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:46,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:20:46,480 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash -87043193, now seen corresponding path program 14 times [2020-12-21 21:20:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:46,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396171747] [2020-12-21 21:20:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:20:47,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396171747] [2020-12-21 21:20:47,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782203123] [2020-12-21 21:20:47,360 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 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 [2020-12-21 21:20:47,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:47,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:47,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:20:47,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:20:47,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:47,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:20:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279703992] [2020-12-21 21:20:47,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:47,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:47,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:47,611 INFO L87 Difference]: Start difference. First operand 1102 states and 1521 transitions. Second operand 38 states. [2020-12-21 21:20:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:48,705 INFO L93 Difference]: Finished difference Result 2317 states and 3107 transitions. [2020-12-21 21:20:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:20:48,706 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 111 [2020-12-21 21:20:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:48,710 INFO L225 Difference]: With dead ends: 2317 [2020-12-21 21:20:48,710 INFO L226 Difference]: Without dead ends: 1286 [2020-12-21 21:20:48,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-12-21 21:20:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1126. [2020-12-21 21:20:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1126 states. [2020-12-21 21:20:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1555 transitions. [2020-12-21 21:20:48,752 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1555 transitions. Word has length 111 [2020-12-21 21:20:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:48,752 INFO L481 AbstractCegarLoop]: Abstraction has 1126 states and 1555 transitions. [2020-12-21 21:20:48,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1555 transitions. [2020-12-21 21:20:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-21 21:20:48,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:48,753 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:48,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:20:48,968 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1583362629, now seen corresponding path program 15 times [2020-12-21 21:20:48,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:48,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080293259] [2020-12-21 21:20:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:20:49,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080293259] [2020-12-21 21:20:49,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801250048] [2020-12-21 21:20:49,904 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 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 [2020-12-21 21:20:50,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-21 21:20:50,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-21 21:20:50,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:50,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2020-12-21 21:20:50,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705632306] [2020-12-21 21:20:50,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 21:20:50,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:50,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 21:20:50,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:20:50,541 INFO L87 Difference]: Start difference. First operand 1126 states and 1555 transitions. Second operand 50 states. [2020-12-21 21:20:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:54,355 INFO L93 Difference]: Finished difference Result 2473 states and 3343 transitions. [2020-12-21 21:20:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-12-21 21:20:54,356 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 113 [2020-12-21 21:20:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:54,360 INFO L225 Difference]: With dead ends: 2473 [2020-12-21 21:20:54,360 INFO L226 Difference]: Without dead ends: 1420 [2020-12-21 21:20:54,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2665 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5053, Invalid=8287, Unknown=0, NotChecked=0, Total=13340 [2020-12-21 21:20:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2020-12-21 21:20:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1210. [2020-12-21 21:20:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-21 21:20:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1668 transitions. [2020-12-21 21:20:54,392 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1668 transitions. Word has length 113 [2020-12-21 21:20:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:54,392 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1668 transitions. [2020-12-21 21:20:54,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 21:20:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1668 transitions. [2020-12-21 21:20:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-21 21:20:54,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:54,394 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:54,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:20:54,610 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:54,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1130783487, now seen corresponding path program 16 times [2020-12-21 21:20:54,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:54,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378434412] [2020-12-21 21:20:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:20:55,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378434412] [2020-12-21 21:20:55,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131385599] [2020-12-21 21:20:55,540 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 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 [2020-12-21 21:20:55,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:55,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:20:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:20:55,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:55,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:20:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665249757] [2020-12-21 21:20:55,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:20:55,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:20:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:55,795 INFO L87 Difference]: Start difference. First operand 1210 states and 1668 transitions. Second operand 40 states. [2020-12-21 21:20:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:57,006 INFO L93 Difference]: Finished difference Result 2537 states and 3401 transitions. [2020-12-21 21:20:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:20:57,006 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 118 [2020-12-21 21:20:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:57,011 INFO L225 Difference]: With dead ends: 2537 [2020-12-21 21:20:57,011 INFO L226 Difference]: Without dead ends: 1402 [2020-12-21 21:20:57,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2020-12-21 21:20:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1234. [2020-12-21 21:20:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-12-21 21:20:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1702 transitions. [2020-12-21 21:20:57,044 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1702 transitions. Word has length 118 [2020-12-21 21:20:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:57,044 INFO L481 AbstractCegarLoop]: Abstraction has 1234 states and 1702 transitions. [2020-12-21 21:20:57,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:20:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1702 transitions. [2020-12-21 21:20:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-21 21:20:57,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:57,045 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:57,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-21 21:20:57,260 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash -22885245, now seen corresponding path program 17 times [2020-12-21 21:20:57,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:57,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353195625] [2020-12-21 21:20:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:20:58,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353195625] [2020-12-21 21:20:58,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105271956] [2020-12-21 21:20:58,297 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 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 [2020-12-21 21:21:19,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2020-12-21 21:21:19,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 21:21:19,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:21:19,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:19,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-21 21:21:19,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095036085] [2020-12-21 21:21:19,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:21:19,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:19,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:21:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:21:19,469 INFO L87 Difference]: Start difference. First operand 1234 states and 1702 transitions. Second operand 41 states. [2020-12-21 21:21:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:20,685 INFO L93 Difference]: Finished difference Result 2587 states and 3469 transitions. [2020-12-21 21:21:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:21:20,686 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 120 [2020-12-21 21:21:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:20,692 INFO L225 Difference]: With dead ends: 2587 [2020-12-21 21:21:20,692 INFO L226 Difference]: Without dead ends: 1430 [2020-12-21 21:21:20,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:21:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2020-12-21 21:21:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1258. [2020-12-21 21:21:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-12-21 21:21:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1736 transitions. [2020-12-21 21:21:20,729 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1736 transitions. Word has length 120 [2020-12-21 21:21:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:20,729 INFO L481 AbstractCegarLoop]: Abstraction has 1258 states and 1736 transitions. [2020-12-21 21:21:20,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:21:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1736 transitions. [2020-12-21 21:21:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-21 21:21:20,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:20,731 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:20,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:20,931 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash -484564091, now seen corresponding path program 18 times [2020-12-21 21:21:20,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:20,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848629637] [2020-12-21 21:21:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:21:22,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848629637] [2020-12-21 21:21:22,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752636678] [2020-12-21 21:21:22,101 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 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 [2020-12-21 21:21:23,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-21 21:21:23,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:23,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:21:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-12-21 21:21:23,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:23,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 15] total 54 [2020-12-21 21:21:23,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737915310] [2020-12-21 21:21:23,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 21:21:23,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 21:21:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:21:23,913 INFO L87 Difference]: Start difference. First operand 1258 states and 1736 transitions. Second operand 54 states. [2020-12-21 21:21:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:28,878 INFO L93 Difference]: Finished difference Result 2753 states and 3721 transitions. [2020-12-21 21:21:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-21 21:21:28,880 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 122 [2020-12-21 21:21:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:28,887 INFO L225 Difference]: With dead ends: 2753 [2020-12-21 21:21:28,887 INFO L226 Difference]: Without dead ends: 1574 [2020-12-21 21:21:28,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6527, Invalid=10765, Unknown=0, NotChecked=0, Total=17292 [2020-12-21 21:21:28,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2020-12-21 21:21:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1348. [2020-12-21 21:21:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2020-12-21 21:21:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1857 transitions. [2020-12-21 21:21:28,933 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1857 transitions. Word has length 122 [2020-12-21 21:21:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:28,934 INFO L481 AbstractCegarLoop]: Abstraction has 1348 states and 1857 transitions. [2020-12-21 21:21:28,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 21:21:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1857 transitions. [2020-12-21 21:21:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-21 21:21:28,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:28,935 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:29,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:29,147 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash 933279229, now seen corresponding path program 19 times [2020-12-21 21:21:29,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:29,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529247672] [2020-12-21 21:21:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:21:30,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529247672] [2020-12-21 21:21:30,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733317950] [2020-12-21 21:21:30,300 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 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 [2020-12-21 21:21:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:30,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:21:30,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:21:30,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:30,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:21:30,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376984794] [2020-12-21 21:21:30,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:21:30,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:21:30,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:21:30,605 INFO L87 Difference]: Start difference. First operand 1348 states and 1857 transitions. Second operand 43 states. [2020-12-21 21:21:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:32,108 INFO L93 Difference]: Finished difference Result 2819 states and 3779 transitions. [2020-12-21 21:21:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:21:32,109 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-12-21 21:21:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:32,115 INFO L225 Difference]: With dead ends: 2819 [2020-12-21 21:21:32,115 INFO L226 Difference]: Without dead ends: 1552 [2020-12-21 21:21:32,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:21:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-12-21 21:21:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1372. [2020-12-21 21:21:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2020-12-21 21:21:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1891 transitions. [2020-12-21 21:21:32,155 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1891 transitions. Word has length 127 [2020-12-21 21:21:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:32,156 INFO L481 AbstractCegarLoop]: Abstraction has 1372 states and 1891 transitions. [2020-12-21 21:21:32,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:21:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1891 transitions. [2020-12-21 21:21:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-21 21:21:32,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:32,156 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:32,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:32,357 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1194862405, now seen corresponding path program 20 times [2020-12-21 21:21:32,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:32,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977117807] [2020-12-21 21:21:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:21:33,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977117807] [2020-12-21 21:21:33,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227448121] [2020-12-21 21:21:33,734 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 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 [2020-12-21 21:21:33,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:21:33,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:21:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:21:34,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:34,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-21 21:21:34,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622976994] [2020-12-21 21:21:34,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:21:34,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:34,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:21:34,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:21:34,018 INFO L87 Difference]: Start difference. First operand 1372 states and 1891 transitions. Second operand 44 states. [2020-12-21 21:21:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:35,717 INFO L93 Difference]: Finished difference Result 2869 states and 3847 transitions. [2020-12-21 21:21:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:21:35,717 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 129 [2020-12-21 21:21:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:35,721 INFO L225 Difference]: With dead ends: 2869 [2020-12-21 21:21:35,721 INFO L226 Difference]: Without dead ends: 1580 [2020-12-21 21:21:35,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:21:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2020-12-21 21:21:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1396. [2020-12-21 21:21:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2020-12-21 21:21:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1925 transitions. [2020-12-21 21:21:35,769 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1925 transitions. Word has length 129 [2020-12-21 21:21:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:35,769 INFO L481 AbstractCegarLoop]: Abstraction has 1396 states and 1925 transitions. [2020-12-21 21:21:35,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:21:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1925 transitions. [2020-12-21 21:21:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 21:21:35,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:35,770 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:35,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 21:21:35,980 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1934539783, now seen corresponding path program 21 times [2020-12-21 21:21:35,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:35,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971623388] [2020-12-21 21:21:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:21:37,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971623388] [2020-12-21 21:21:37,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455073692] [2020-12-21 21:21:37,293 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 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 [2020-12-21 21:21:37,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-21 21:21:37,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:37,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:21:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2020-12-21 21:21:38,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:38,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 16] total 58 [2020-12-21 21:21:38,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713168955] [2020-12-21 21:21:38,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-21 21:21:38,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:38,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-21 21:21:38,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1094, Invalid=2212, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 21:21:38,233 INFO L87 Difference]: Start difference. First operand 1396 states and 1925 transitions. Second operand 58 states. [2020-12-21 21:21:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:44,815 INFO L93 Difference]: Finished difference Result 3045 states and 4115 transitions. [2020-12-21 21:21:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-12-21 21:21:44,815 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 131 [2020-12-21 21:21:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:44,818 INFO L225 Difference]: With dead ends: 3045 [2020-12-21 21:21:44,818 INFO L226 Difference]: Without dead ends: 1734 [2020-12-21 21:21:44,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8296, Invalid=13756, Unknown=0, NotChecked=0, Total=22052 [2020-12-21 21:21:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-12-21 21:21:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1492. [2020-12-21 21:21:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1492 states. [2020-12-21 21:21:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2054 transitions. [2020-12-21 21:21:44,865 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2054 transitions. Word has length 131 [2020-12-21 21:21:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:44,865 INFO L481 AbstractCegarLoop]: Abstraction has 1492 states and 2054 transitions. [2020-12-21 21:21:44,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-21 21:21:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2054 transitions. [2020-12-21 21:21:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 21:21:44,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:44,866 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:45,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:45,067 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash -594574771, now seen corresponding path program 22 times [2020-12-21 21:21:45,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:45,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185240490] [2020-12-21 21:21:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:21:46,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185240490] [2020-12-21 21:21:46,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993377163] [2020-12-21 21:21:46,493 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 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 [2020-12-21 21:21:46,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:21:46,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:46,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-21 21:21:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:21:46,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:46,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-21 21:21:46,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404221935] [2020-12-21 21:21:46,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:21:46,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:46,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:21:46,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:21:46,842 INFO L87 Difference]: Start difference. First operand 1492 states and 2054 transitions. Second operand 46 states. [2020-12-21 21:21:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:48,463 INFO L93 Difference]: Finished difference Result 3113 states and 4173 transitions. [2020-12-21 21:21:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:21:48,464 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 136 [2020-12-21 21:21:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:48,466 INFO L225 Difference]: With dead ends: 3113 [2020-12-21 21:21:48,467 INFO L226 Difference]: Without dead ends: 1708 [2020-12-21 21:21:48,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:21:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-12-21 21:21:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1516. [2020-12-21 21:21:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2020-12-21 21:21:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2088 transitions. [2020-12-21 21:21:48,515 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2088 transitions. Word has length 136 [2020-12-21 21:21:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:48,515 INFO L481 AbstractCegarLoop]: Abstraction has 1516 states and 2088 transitions. [2020-12-21 21:21:48,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:21:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2088 transitions. [2020-12-21 21:21:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 21:21:48,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:48,516 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:48,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:48,717 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:48,717 INFO L82 PathProgramCache]: Analyzing trace with hash -959408817, now seen corresponding path program 23 times [2020-12-21 21:21:48,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:48,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627358691] [2020-12-21 21:21:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2096 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:21:50,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627358691] [2020-12-21 21:21:50,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998516221] [2020-12-21 21:21:50,254 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 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 [2020-12-21 21:22:11,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2020-12-21 21:22:11,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 21:22:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2096 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:22:11,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:11,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-21 21:22:11,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780119995] [2020-12-21 21:22:11,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:22:11,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:22:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:22:11,356 INFO L87 Difference]: Start difference. First operand 1516 states and 2088 transitions. Second operand 47 states. [2020-12-21 21:22:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:13,015 INFO L93 Difference]: Finished difference Result 3163 states and 4241 transitions. [2020-12-21 21:22:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:22:13,016 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 138 [2020-12-21 21:22:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:13,020 INFO L225 Difference]: With dead ends: 3163 [2020-12-21 21:22:13,020 INFO L226 Difference]: Without dead ends: 1736 [2020-12-21 21:22:13,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:22:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2020-12-21 21:22:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1540. [2020-12-21 21:22:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1540 states. [2020-12-21 21:22:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2122 transitions. [2020-12-21 21:22:13,069 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2122 transitions. Word has length 138 [2020-12-21 21:22:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:13,069 INFO L481 AbstractCegarLoop]: Abstraction has 1540 states and 2122 transitions. [2020-12-21 21:22:13,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:22:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2122 transitions. [2020-12-21 21:22:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-21 21:22:13,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:13,070 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:13,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-21 21:22:13,275 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:13,275 INFO L82 PathProgramCache]: Analyzing trace with hash 622391249, now seen corresponding path program 24 times [2020-12-21 21:22:13,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:13,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119638138] [2020-12-21 21:22:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:22:14,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119638138] [2020-12-21 21:22:14,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914049225] [2020-12-21 21:22:14,709 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 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 [2020-12-21 21:22:17,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2020-12-21 21:22:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:22:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-12-21 21:22:18,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:18,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 17] total 62 [2020-12-21 21:22:18,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130768059] [2020-12-21 21:22:18,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-21 21:22:18,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:18,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-21 21:22:18,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1247, Invalid=2535, Unknown=0, NotChecked=0, Total=3782 [2020-12-21 21:22:18,621 INFO L87 Difference]: Start difference. First operand 1540 states and 2122 transitions. Second operand 62 states. [2020-12-21 21:22:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:27,010 INFO L93 Difference]: Finished difference Result 3349 states and 4525 transitions. [2020-12-21 21:22:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2020-12-21 21:22:27,011 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 140 [2020-12-21 21:22:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:27,014 INFO L225 Difference]: With dead ends: 3349 [2020-12-21 21:22:27,014 INFO L226 Difference]: Without dead ends: 1900 [2020-12-21 21:22:27,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6268 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=10396, Invalid=17326, Unknown=0, NotChecked=0, Total=27722 [2020-12-21 21:22:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-12-21 21:22:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1642. [2020-12-21 21:22:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1642 states. [2020-12-21 21:22:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2259 transitions. [2020-12-21 21:22:27,065 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2259 transitions. Word has length 140 [2020-12-21 21:22:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:27,065 INFO L481 AbstractCegarLoop]: Abstraction has 1642 states and 2259 transitions. [2020-12-21 21:22:27,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-21 21:22:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2259 transitions. [2020-12-21 21:22:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-21 21:22:27,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:27,066 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:27,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-21 21:22:27,267 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash -275897679, now seen corresponding path program 25 times [2020-12-21 21:22:27,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:27,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28338688] [2020-12-21 21:22:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:22:28,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28338688] [2020-12-21 21:22:28,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908349226] [2020-12-21 21:22:28,804 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 21:22:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:22:29,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:29,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-21 21:22:29,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016977686] [2020-12-21 21:22:29,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:22:29,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:22:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:22:29,125 INFO L87 Difference]: Start difference. First operand 1642 states and 2259 transitions. Second operand 49 states. [2020-12-21 21:22:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:30,973 INFO L93 Difference]: Finished difference Result 3419 states and 4583 transitions. [2020-12-21 21:22:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:22:30,974 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-12-21 21:22:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:30,977 INFO L225 Difference]: With dead ends: 3419 [2020-12-21 21:22:30,978 INFO L226 Difference]: Without dead ends: 1870 [2020-12-21 21:22:30,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:22:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2020-12-21 21:22:31,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1666. [2020-12-21 21:22:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1666 states. [2020-12-21 21:22:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2293 transitions. [2020-12-21 21:22:31,033 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2293 transitions. Word has length 145 [2020-12-21 21:22:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:31,034 INFO L481 AbstractCegarLoop]: Abstraction has 1666 states and 2293 transitions. [2020-12-21 21:22:31,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:22:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2293 transitions. [2020-12-21 21:22:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-21 21:22:31,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:31,034 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:31,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 21:22:31,235 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:31,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1516589551, now seen corresponding path program 26 times [2020-12-21 21:22:31,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:31,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903848811] [2020-12-21 21:22:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:22:32,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903848811] [2020-12-21 21:22:32,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779217909] [2020-12-21 21:22:32,941 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:33,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:22:33,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 21:22:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:22:33,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:33,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-21 21:22:33,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313948110] [2020-12-21 21:22:33,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 21:22:33,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 21:22:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:22:33,281 INFO L87 Difference]: Start difference. First operand 1666 states and 2293 transitions. Second operand 50 states. [2020-12-21 21:22:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:35,363 INFO L93 Difference]: Finished difference Result 3469 states and 4651 transitions. [2020-12-21 21:22:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 21:22:35,370 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 147 [2020-12-21 21:22:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:35,373 INFO L225 Difference]: With dead ends: 3469 [2020-12-21 21:22:35,373 INFO L226 Difference]: Without dead ends: 1898 [2020-12-21 21:22:35,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:22:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-12-21 21:22:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1690. [2020-12-21 21:22:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-12-21 21:22:35,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2327 transitions. [2020-12-21 21:22:35,427 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2327 transitions. Word has length 147 [2020-12-21 21:22:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:35,427 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 2327 transitions. [2020-12-21 21:22:35,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 21:22:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2327 transitions. [2020-12-21 21:22:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-21 21:22:35,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:35,428 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:35,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:35,629 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1814931885, now seen corresponding path program 27 times [2020-12-21 21:22:35,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:35,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499905825] [2020-12-21 21:22:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2496 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:22:37,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499905825] [2020-12-21 21:22:37,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929296395] [2020-12-21 21:22:37,402 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:37,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-21 21:22:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:22:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2496 backedges. 93 proven. 287 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-12-21 21:22:38,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:38,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 20] total 68 [2020-12-21 21:22:38,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963448725] [2020-12-21 21:22:38,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-21 21:22:38,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-21 21:22:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1513, Invalid=3043, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 21:22:38,746 INFO L87 Difference]: Start difference. First operand 1690 states and 2327 transitions. Second operand 68 states. [2020-12-21 21:22:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:49,359 INFO L93 Difference]: Finished difference Result 3667 states and 4955 transitions. [2020-12-21 21:22:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-12-21 21:22:49,360 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 149 [2020-12-21 21:22:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:49,364 INFO L225 Difference]: With dead ends: 3667 [2020-12-21 21:22:49,364 INFO L226 Difference]: Without dead ends: 2074 [2020-12-21 21:22:49,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8092 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=13208, Invalid=21948, Unknown=0, NotChecked=0, Total=35156 [2020-12-21 21:22:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-12-21 21:22:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1822. [2020-12-21 21:22:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2020-12-21 21:22:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2506 transitions. [2020-12-21 21:22:49,463 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2506 transitions. Word has length 149 [2020-12-21 21:22:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:49,464 INFO L481 AbstractCegarLoop]: Abstraction has 1822 states and 2506 transitions. [2020-12-21 21:22:49,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-21 21:22:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2506 transitions. [2020-12-21 21:22:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-21 21:22:49,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:49,465 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:49,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:49,679 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:49,679 INFO L82 PathProgramCache]: Analyzing trace with hash -177812965, now seen corresponding path program 28 times [2020-12-21 21:22:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:49,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322737751] [2020-12-21 21:22:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2731 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:22:51,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322737751] [2020-12-21 21:22:51,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908599590] [2020-12-21 21:22:51,616 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:51,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:22:51,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 21:22:51,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2731 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:22:51,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:51,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-21 21:22:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612316687] [2020-12-21 21:22:51,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 21:22:51,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:51,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 21:22:51,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:22:51,978 INFO L87 Difference]: Start difference. First operand 1822 states and 2506 transitions. Second operand 53 states. [2020-12-21 21:22:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:54,189 INFO L93 Difference]: Finished difference Result 3787 states and 5077 transitions. [2020-12-21 21:22:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 21:22:54,190 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 156 [2020-12-21 21:22:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:54,193 INFO L225 Difference]: With dead ends: 3787 [2020-12-21 21:22:54,194 INFO L226 Difference]: Without dead ends: 2066 [2020-12-21 21:22:54,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:22:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-12-21 21:22:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1846. [2020-12-21 21:22:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2020-12-21 21:22:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2540 transitions. [2020-12-21 21:22:54,250 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2540 transitions. Word has length 156 [2020-12-21 21:22:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:54,250 INFO L481 AbstractCegarLoop]: Abstraction has 1846 states and 2540 transitions. [2020-12-21 21:22:54,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 21:22:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2540 transitions. [2020-12-21 21:22:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-21 21:22:54,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:54,251 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:54,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-21 21:22:54,463 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1466808291, now seen corresponding path program 29 times [2020-12-21 21:22:54,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:54,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31957878] [2020-12-21 21:22:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:22:56,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31957878] [2020-12-21 21:22:56,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569211500] [2020-12-21 21:22:56,504 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:45,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2020-12-21 21:23:45,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:45,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-21 21:23:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:23:45,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:45,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-21 21:23:45,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496636372] [2020-12-21 21:23:45,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 21:23:45,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:45,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 21:23:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:23:45,663 INFO L87 Difference]: Start difference. First operand 1846 states and 2540 transitions. Second operand 54 states. [2020-12-21 21:23:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:48,488 INFO L93 Difference]: Finished difference Result 3837 states and 5145 transitions. [2020-12-21 21:23:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 21:23:48,488 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 158 [2020-12-21 21:23:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:48,494 INFO L225 Difference]: With dead ends: 3837 [2020-12-21 21:23:48,494 INFO L226 Difference]: Without dead ends: 2094 [2020-12-21 21:23:48,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:23:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-21 21:23:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1870. [2020-12-21 21:23:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1870 states. [2020-12-21 21:23:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2574 transitions. [2020-12-21 21:23:48,612 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2574 transitions. Word has length 158 [2020-12-21 21:23:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:48,612 INFO L481 AbstractCegarLoop]: Abstraction has 1870 states and 2574 transitions. [2020-12-21 21:23:48,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 21:23:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2574 transitions. [2020-12-21 21:23:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-21 21:23:48,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:48,614 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:48,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:48,815 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:48,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:48,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1054231967, now seen corresponding path program 30 times [2020-12-21 21:23:48,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:48,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558686583] [2020-12-21 21:23:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:23:50,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558686583] [2020-12-21 21:23:50,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275407676] [2020-12-21 21:23:50,952 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:57,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-21 21:23:57,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:23:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2020-12-21 21:23:58,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:58,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 19] total 71 [2020-12-21 21:23:58,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106349246] [2020-12-21 21:23:58,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-21 21:23:58,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:58,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-21 21:23:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1637, Invalid=3333, Unknown=0, NotChecked=0, Total=4970 [2020-12-21 21:23:58,687 INFO L87 Difference]: Start difference. First operand 1870 states and 2574 transitions. Second operand 71 states.