./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:17:01,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:17:01,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:17:01,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:17:01,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:17:01,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:17:01,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:17:01,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:17:01,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:17:01,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:17:01,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:17:01,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:17:01,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:17:01,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:17:01,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:17:01,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:17:01,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:17:01,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:17:01,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:17:01,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:17:01,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:17:01,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:17:01,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:17:01,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:17:01,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:17:01,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:17:01,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:17:01,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:17:01,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:17:01,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:17:01,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:17:01,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:17:01,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:17:01,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:17:01,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:17:01,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:17:01,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:17:01,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:17:01,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:17:01,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:17:01,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:17:01,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:17:02,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:17:02,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:17:02,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:17:02,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:17:02,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:17:02,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:17:02,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:17:02,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:17:02,011 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:17:02,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:17:02,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:17:02,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:17:02,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:17:02,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:17:02,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:17:02,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:17:02,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:17:02,013 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:17:02,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:17:02,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:17:02,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:17:02,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:17:02,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:17:02,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:17:02,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:17:02,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:17:02,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:17:02,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:17:02,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:17:02,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:17:02,016 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:17:02,016 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:17:02,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:17:02,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:17:02,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2021-12-16 22:17:02,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:17:02,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:17:02,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:17:02,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:17:02,255 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:17:02,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2021-12-16 22:17:02,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a2bc094/29a832625fa44924994880c0750ac127/FLAG6b56fd227 [2021-12-16 22:17:02,664 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:17:02,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2021-12-16 22:17:02,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a2bc094/29a832625fa44924994880c0750ac127/FLAG6b56fd227 [2021-12-16 22:17:02,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a2bc094/29a832625fa44924994880c0750ac127 [2021-12-16 22:17:02,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:17:02,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:17:02,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:17:02,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:17:02,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:17:02,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f9e0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02, skipping insertion in model container [2021-12-16 22:17:02,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:17:02,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:17:02,821 WARN L230 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-industry-pattern/array_shadowinit.i[809,822] [2021-12-16 22:17:02,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:17:02,835 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:17:02,843 WARN L230 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-industry-pattern/array_shadowinit.i[809,822] [2021-12-16 22:17:02,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:17:02,866 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:17:02,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02 WrapperNode [2021-12-16 22:17:02,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:17:02,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:17:02,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:17:02,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:17:02,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,892 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2021-12-16 22:17:02,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:17:02,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:17:02,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:17:02,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:17:02,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:17:02,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:17:02,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:17:02,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:17:02,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (1/1) ... [2021-12-16 22:17:02,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:17:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:02,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 22:17:02,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 22:17:02,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:17:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:17:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:17:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:17:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:17:03,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:17:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:17:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:17:03,044 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:17:03,045 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:17:03,110 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:17:03,113 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:17:03,114 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 22:17:03,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:17:03 BoogieIcfgContainer [2021-12-16 22:17:03,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:17:03,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:17:03,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:17:03,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:17:03,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:17:02" (1/3) ... [2021-12-16 22:17:03,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f99a8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:17:03, skipping insertion in model container [2021-12-16 22:17:03,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:02" (2/3) ... [2021-12-16 22:17:03,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f99a8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:17:03, skipping insertion in model container [2021-12-16 22:17:03,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:17:03" (3/3) ... [2021-12-16 22:17:03,121 INFO L111 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2021-12-16 22:17:03,124 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:17:03,125 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:17:03,159 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:17:03,164 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 22:17:03,165 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:17:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 22:17:03,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:03,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:03,178 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:03,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:03,182 INFO L85 PathProgramCache]: Analyzing trace with hash 126038137, now seen corresponding path program 1 times [2021-12-16 22:17:03,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:03,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378488644] [2021-12-16 22:17:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:03,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:03,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:03,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378488644] [2021-12-16 22:17:03,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378488644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:03,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:17:03,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 22:17:03,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231787553] [2021-12-16 22:17:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:03,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:17:03,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:17:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:17:03,331 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:03,340 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-12-16 22:17:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:17:03,342 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 22:17:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:03,346 INFO L225 Difference]: With dead ends: 26 [2021-12-16 22:17:03,347 INFO L226 Difference]: Without dead ends: 10 [2021-12-16 22:17:03,349 INFO L932 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 [2021-12-16 22:17:03,351 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:03,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:03,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-16 22:17:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-16 22:17:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-16 22:17:03,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-12-16 22:17:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:03,372 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-16 22:17:03,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-16 22:17:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 22:17:03,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:03,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:03,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:17:03,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash 122344053, now seen corresponding path program 1 times [2021-12-16 22:17:03,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:03,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933883268] [2021-12-16 22:17:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:03,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:03,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933883268] [2021-12-16 22:17:03,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933883268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:03,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:17:03,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:17:03,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570043309] [2021-12-16 22:17:03,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:03,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:17:03,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:03,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:17:03,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:17:03,434 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:03,468 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-12-16 22:17:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:17:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 22:17:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:03,469 INFO L225 Difference]: With dead ends: 17 [2021-12-16 22:17:03,470 INFO L226 Difference]: Without dead ends: 11 [2021-12-16 22:17:03,471 INFO L932 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 [2021-12-16 22:17:03,472 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:03,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-16 22:17:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-16 22:17:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-12-16 22:17:03,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-12-16 22:17:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:03,479 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-12-16 22:17:03,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-12-16 22:17:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 22:17:03,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:03,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:03,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 22:17:03,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:03,491 INFO L85 PathProgramCache]: Analyzing trace with hash -450855509, now seen corresponding path program 1 times [2021-12-16 22:17:03,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:03,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674549315] [2021-12-16 22:17:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:03,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:03,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:03,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674549315] [2021-12-16 22:17:03,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674549315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:03,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162142977] [2021-12-16 22:17:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:03,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:03,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:03,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:03,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:17:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:03,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 22:17:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:03,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-16 22:17:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:03,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:03,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-16 22:17:03,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-16 22:17:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:04,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162142977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:04,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:04,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-16 22:17:04,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914409334] [2021-12-16 22:17:04,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:04,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 22:17:04,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 22:17:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 22:17:04,002 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:04,066 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-12-16 22:17:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:17:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 22:17:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:04,067 INFO L225 Difference]: With dead ends: 17 [2021-12-16 22:17:04,067 INFO L226 Difference]: Without dead ends: 15 [2021-12-16 22:17:04,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:17:04,068 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:04,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-16 22:17:04,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-12-16 22:17:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-16 22:17:04,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-12-16 22:17:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:04,071 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-16 22:17:04,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-16 22:17:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 22:17:04,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:04,072 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:04,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:04,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:04,292 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1068940558, now seen corresponding path program 1 times [2021-12-16 22:17:04,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:04,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517634648] [2021-12-16 22:17:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:04,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:04,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:04,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517634648] [2021-12-16 22:17:04,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517634648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:04,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582788389] [2021-12-16 22:17:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:04,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:04,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:04,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:04,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:17:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 22:17:04,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:04,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:04,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582788389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:04,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:04,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-16 22:17:04,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544740910] [2021-12-16 22:17:04,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:04,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 22:17:04,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 22:17:04,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-16 22:17:04,473 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:04,524 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-16 22:17:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 22:17:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 22:17:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:04,527 INFO L225 Difference]: With dead ends: 30 [2021-12-16 22:17:04,527 INFO L226 Difference]: Without dead ends: 20 [2021-12-16 22:17:04,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:17:04,531 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:04,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-16 22:17:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-12-16 22:17:04,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-16 22:17:04,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-12-16 22:17:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:04,541 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-16 22:17:04,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-16 22:17:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 22:17:04,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:04,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:04,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 22:17:04,752 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash 407528232, now seen corresponding path program 2 times [2021-12-16 22:17:04,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:04,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322790969] [2021-12-16 22:17:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:04,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:04,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322790969] [2021-12-16 22:17:04,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322790969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202553873] [2021-12-16 22:17:04,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:04,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:04,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:04,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:04,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:17:04,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:04,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:04,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 22:17:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:04,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:05,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:05,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:05,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:05,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202553873] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:05,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:05,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2021-12-16 22:17:05,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354509919] [2021-12-16 22:17:05,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:05,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 22:17:05,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 22:17:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-16 22:17:05,116 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:05,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:05,205 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-12-16 22:17:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 22:17:05,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 22:17:05,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:05,206 INFO L225 Difference]: With dead ends: 21 [2021-12-16 22:17:05,206 INFO L226 Difference]: Without dead ends: 19 [2021-12-16 22:17:05,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-16 22:17:05,207 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:05,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 33 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-16 22:17:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-12-16 22:17:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-12-16 22:17:05,210 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-12-16 22:17:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:05,210 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-16 22:17:05,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-12-16 22:17:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 22:17:05,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:05,211 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:05,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:05,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:05,434 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:05,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1194192811, now seen corresponding path program 3 times [2021-12-16 22:17:05,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:05,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096835368] [2021-12-16 22:17:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:05,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:05,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:05,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096835368] [2021-12-16 22:17:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096835368] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:05,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662037462] [2021-12-16 22:17:05,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:17:05,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:05,497 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:05,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:17:05,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:17:05,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 22:17:05,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:05,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:05,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662037462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:05,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:05,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 22:17:05,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463746366] [2021-12-16 22:17:05,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:05,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:17:05,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:17:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:17:05,654 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:05,717 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-12-16 22:17:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 22:17:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 22:17:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:05,718 INFO L225 Difference]: With dead ends: 37 [2021-12-16 22:17:05,718 INFO L226 Difference]: Without dead ends: 24 [2021-12-16 22:17:05,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-16 22:17:05,720 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:05,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-16 22:17:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2021-12-16 22:17:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-16 22:17:05,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-12-16 22:17:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:05,727 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-16 22:17:05,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-16 22:17:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 22:17:05,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:05,729 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:05,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:05,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:05,946 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash -298048117, now seen corresponding path program 4 times [2021-12-16 22:17:05,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:05,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535421639] [2021-12-16 22:17:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:05,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:06,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535421639] [2021-12-16 22:17:06,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535421639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924964482] [2021-12-16 22:17:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:17:06,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:06,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:06,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:17:06,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:17:06,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:06,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:17:06,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:06,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:06,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:06,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:06,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:06,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924964482] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:06,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:06,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2021-12-16 22:17:06,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683872320] [2021-12-16 22:17:06,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:06,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:17:06,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:06,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:17:06,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:17:06,271 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:06,384 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-12-16 22:17:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:17:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 22:17:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:06,387 INFO L225 Difference]: With dead ends: 25 [2021-12-16 22:17:06,387 INFO L226 Difference]: Without dead ends: 23 [2021-12-16 22:17:06,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:17:06,388 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:06,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-16 22:17:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-12-16 22:17:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-16 22:17:06,391 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2021-12-16 22:17:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:06,391 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-16 22:17:06,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-16 22:17:06,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 22:17:06,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:06,392 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:06,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:06,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:06,609 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1449259246, now seen corresponding path program 5 times [2021-12-16 22:17:06,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:06,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800819397] [2021-12-16 22:17:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:06,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:06,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:06,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800819397] [2021-12-16 22:17:06,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800819397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:06,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143341332] [2021-12-16 22:17:06,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:17:06,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:06,678 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:06,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:17:06,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 22:17:06,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 22:17:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:06,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:06,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143341332] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:06,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:06,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-16 22:17:06,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029999983] [2021-12-16 22:17:06,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:06,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 22:17:06,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 22:17:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-16 22:17:06,833 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:06,903 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-12-16 22:17:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:17:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-16 22:17:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:06,904 INFO L225 Difference]: With dead ends: 44 [2021-12-16 22:17:06,904 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 22:17:06,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:17:06,905 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:06,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 22:17:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-12-16 22:17:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-12-16 22:17:06,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2021-12-16 22:17:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:06,907 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-12-16 22:17:06,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-12-16 22:17:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 22:17:06,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:06,908 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:06,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:07,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:07,120 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1156487496, now seen corresponding path program 6 times [2021-12-16 22:17:07,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:07,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895850548] [2021-12-16 22:17:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:07,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:07,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:07,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895850548] [2021-12-16 22:17:07,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895850548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:07,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145510916] [2021-12-16 22:17:07,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:17:07,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:07,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:07,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:07,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:17:07,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-16 22:17:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:07,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 22:17:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:07,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:07,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:07,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:07,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145510916] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:07,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:07,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2021-12-16 22:17:07,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389594093] [2021-12-16 22:17:07,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:07,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 22:17:07,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 22:17:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-16 22:17:07,514 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:07,649 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-12-16 22:17:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 22:17:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 22:17:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:07,650 INFO L225 Difference]: With dead ends: 29 [2021-12-16 22:17:07,651 INFO L226 Difference]: Without dead ends: 27 [2021-12-16 22:17:07,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:17:07,652 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:07,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 80 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-16 22:17:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-12-16 22:17:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-16 22:17:07,655 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-12-16 22:17:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:07,655 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-16 22:17:07,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-16 22:17:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 22:17:07,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:07,656 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:07,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:07,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:07,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1303861707, now seen corresponding path program 7 times [2021-12-16 22:17:07,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319850298] [2021-12-16 22:17:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:07,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:07,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319850298] [2021-12-16 22:17:07,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319850298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801378247] [2021-12-16 22:17:07,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:17:07,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:07,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:07,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:07,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:17:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 22:17:08,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:08,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:08,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801378247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:08,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:08,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-16 22:17:08,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123480226] [2021-12-16 22:17:08,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:08,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:17:08,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:17:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:17:08,143 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:08,228 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-16 22:17:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 22:17:08,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-16 22:17:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:08,229 INFO L225 Difference]: With dead ends: 51 [2021-12-16 22:17:08,229 INFO L226 Difference]: Without dead ends: 32 [2021-12-16 22:17:08,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:17:08,230 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:08,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 61 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-16 22:17:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2021-12-16 22:17:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-12-16 22:17:08,233 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2021-12-16 22:17:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:08,233 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-12-16 22:17:08,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-12-16 22:17:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 22:17:08,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:08,234 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:08,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:08,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:17:08,440 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:08,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1052957333, now seen corresponding path program 8 times [2021-12-16 22:17:08,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:08,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551154033] [2021-12-16 22:17:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:08,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:08,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:08,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551154033] [2021-12-16 22:17:08,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551154033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:08,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875511216] [2021-12-16 22:17:08,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:08,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:08,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:08,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:08,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:17:08,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:08,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:17:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:08,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:17:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:08,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:08,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:09,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875511216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:09,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:09,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2021-12-16 22:17:09,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765264944] [2021-12-16 22:17:09,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 22:17:09,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 22:17:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:17:09,018 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:09,386 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-12-16 22:17:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 22:17:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 22:17:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:09,387 INFO L225 Difference]: With dead ends: 33 [2021-12-16 22:17:09,387 INFO L226 Difference]: Without dead ends: 31 [2021-12-16 22:17:09,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2021-12-16 22:17:09,389 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:09,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 161 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-16 22:17:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-12-16 22:17:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-12-16 22:17:09,391 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-12-16 22:17:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:09,392 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-12-16 22:17:09,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-12-16 22:17:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:17:09,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:09,392 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:09,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:09,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:09,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1794016050, now seen corresponding path program 9 times [2021-12-16 22:17:09,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:09,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580072236] [2021-12-16 22:17:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:09,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:09,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580072236] [2021-12-16 22:17:09,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580072236] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433247845] [2021-12-16 22:17:09,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:17:09,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:09,692 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:09,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:17:09,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 22:17:09,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:09,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 22:17:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:09,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:09,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433247845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:09,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:09,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-16 22:17:09,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365537145] [2021-12-16 22:17:09,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:09,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:17:09,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:17:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:17:09,948 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:10,038 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-12-16 22:17:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 22:17:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-16 22:17:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:10,039 INFO L225 Difference]: With dead ends: 58 [2021-12-16 22:17:10,039 INFO L226 Difference]: Without dead ends: 36 [2021-12-16 22:17:10,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:17:10,040 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:10,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 68 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:10,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-16 22:17:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-12-16 22:17:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-16 22:17:10,050 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2021-12-16 22:17:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:10,051 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-16 22:17:10,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-16 22:17:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 22:17:10,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:10,054 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:10,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:10,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 22:17:10,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:10,272 INFO L85 PathProgramCache]: Analyzing trace with hash -528189592, now seen corresponding path program 10 times [2021-12-16 22:17:10,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:10,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514833667] [2021-12-16 22:17:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:10,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:10,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514833667] [2021-12-16 22:17:10,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514833667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166752478] [2021-12-16 22:17:10,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:17:10,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:10,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:10,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:10,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:17:10,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:17:10,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 22:17:10,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:10,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:10,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:10,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:10,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:10,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166752478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:10,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:10,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2021-12-16 22:17:10,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654319376] [2021-12-16 22:17:10,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:10,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:17:10,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:17:10,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:17:10,793 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:11,033 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-12-16 22:17:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 22:17:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-16 22:17:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:11,034 INFO L225 Difference]: With dead ends: 37 [2021-12-16 22:17:11,034 INFO L226 Difference]: Without dead ends: 35 [2021-12-16 22:17:11,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:17:11,035 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:11,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 140 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-16 22:17:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-16 22:17:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-16 22:17:11,039 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2021-12-16 22:17:11,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:11,040 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-16 22:17:11,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-16 22:17:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 22:17:11,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:11,041 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:11,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:11,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 22:17:11,256 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:11,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1468830741, now seen corresponding path program 11 times [2021-12-16 22:17:11,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:11,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076317471] [2021-12-16 22:17:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:11,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:11,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076317471] [2021-12-16 22:17:11,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076317471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349685866] [2021-12-16 22:17:11,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:17:11,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:11,352 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:11,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:17:11,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-16 22:17:11,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:11,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 22:17:11,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:11,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:11,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349685866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:11,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:11,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-16 22:17:11,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421364057] [2021-12-16 22:17:11,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:11,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 22:17:11,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 22:17:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-16 22:17:11,663 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:11,783 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-12-16 22:17:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 22:17:11,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-16 22:17:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:11,784 INFO L225 Difference]: With dead ends: 65 [2021-12-16 22:17:11,784 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 22:17:11,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:17:11,785 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:11,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 70 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 22:17:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-12-16 22:17:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-16 22:17:11,790 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2021-12-16 22:17:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:11,790 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-16 22:17:11,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-16 22:17:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 22:17:11,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:11,791 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:11,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:11,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 22:17:11,999 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1812036939, now seen corresponding path program 12 times [2021-12-16 22:17:12,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:12,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177376801] [2021-12-16 22:17:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:12,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:12,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177376801] [2021-12-16 22:17:12,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177376801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697052025] [2021-12-16 22:17:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:17:12,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:12,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:12,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:17:12,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-16 22:17:12,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 22:17:12,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:12,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:17:12,695 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-16 22:17:12,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2021-12-16 22:17:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:12,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:13,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 22:17:13,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-16 22:17:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:13,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697052025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:13,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:13,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2021-12-16 22:17:13,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511859342] [2021-12-16 22:17:13,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:13,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-16 22:17:13,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:13,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-16 22:17:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 22:17:13,826 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:14,546 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-12-16 22:17:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-16 22:17:14,547 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 22:17:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:14,547 INFO L225 Difference]: With dead ends: 65 [2021-12-16 22:17:14,547 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 22:17:14,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=664, Invalid=6142, Unknown=0, NotChecked=0, Total=6806 [2021-12-16 22:17:14,549 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 204 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 480 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2021-12-16 22:17:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 22:17:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-12-16 22:17:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-12-16 22:17:14,556 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-12-16 22:17:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:14,556 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-12-16 22:17:14,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-12-16 22:17:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 22:17:14,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:14,557 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:14,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:14,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 22:17:14,767 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1382940040, now seen corresponding path program 13 times [2021-12-16 22:17:14,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:14,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493983618] [2021-12-16 22:17:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:14,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:14,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:14,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493983618] [2021-12-16 22:17:14,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493983618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:14,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905637842] [2021-12-16 22:17:14,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:17:14,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:14,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:14,970 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:14,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 22:17:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-16 22:17:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:15,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:15,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:15,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:15,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905637842] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:15,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:15,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 29 [2021-12-16 22:17:15,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545399764] [2021-12-16 22:17:15,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:15,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 22:17:15,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 22:17:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:17:15,401 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:15,745 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-12-16 22:17:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 22:17:15,745 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-16 22:17:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:15,746 INFO L225 Difference]: With dead ends: 45 [2021-12-16 22:17:15,746 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 22:17:15,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 22:17:15,747 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:15,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 220 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:17:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 22:17:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-12-16 22:17:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-16 22:17:15,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2021-12-16 22:17:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:15,750 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-16 22:17:15,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-16 22:17:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 22:17:15,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:15,751 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:15,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:15,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:15,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1845221877, now seen corresponding path program 14 times [2021-12-16 22:17:15,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556667159] [2021-12-16 22:17:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:15,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:16,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556667159] [2021-12-16 22:17:16,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556667159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511507604] [2021-12-16 22:17:16,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:16,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:16,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:16,122 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:16,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 22:17:16,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:16,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:16,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 22:17:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:16,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:16,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511507604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:16,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:16,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-12-16 22:17:16,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737925454] [2021-12-16 22:17:16,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:16,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 22:17:16,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:16,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 22:17:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:17:16,476 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:16,628 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-12-16 22:17:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 22:17:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-16 22:17:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:16,629 INFO L225 Difference]: With dead ends: 79 [2021-12-16 22:17:16,629 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 22:17:16,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 22:17:16,630 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:16,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 85 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 22:17:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-12-16 22:17:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-12-16 22:17:16,633 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2021-12-16 22:17:16,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:16,633 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-12-16 22:17:16,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-12-16 22:17:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 22:17:16,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:16,634 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:16,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:16,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 22:17:16,848 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1575431467, now seen corresponding path program 15 times [2021-12-16 22:17:16,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:16,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892257704] [2021-12-16 22:17:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:16,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:17,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892257704] [2021-12-16 22:17:17,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892257704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:17,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699548113] [2021-12-16 22:17:17,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:17:17,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:17,122 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:17,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 22:17:17,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 22:17:17,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:17,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 22:17:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:17,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:17:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:17,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:18,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:18,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:18,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699548113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:18,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:18,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2021-12-16 22:17:18,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987435536] [2021-12-16 22:17:18,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:18,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-16 22:17:18,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:18,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-16 22:17:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2410, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 22:17:18,155 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:19,040 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-12-16 22:17:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 22:17:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-16 22:17:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:19,041 INFO L225 Difference]: With dead ends: 49 [2021-12-16 22:17:19,041 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 22:17:19,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=301, Invalid=4529, Unknown=0, NotChecked=0, Total=4830 [2021-12-16 22:17:19,042 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:19,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 400 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 22:17:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 22:17:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-16 22:17:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-16 22:17:19,050 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2021-12-16 22:17:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:19,051 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-16 22:17:19,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-16 22:17:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 22:17:19,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:19,052 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:19,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:19,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 22:17:19,263 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1718983822, now seen corresponding path program 16 times [2021-12-16 22:17:19,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:19,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618078525] [2021-12-16 22:17:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:19,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:19,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:19,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618078525] [2021-12-16 22:17:19,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618078525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:19,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876639503] [2021-12-16 22:17:19,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:17:19,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:19,426 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:19,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 22:17:19,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:17:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 22:17:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:19,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:19,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876639503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:19,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:19,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-12-16 22:17:19,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121232301] [2021-12-16 22:17:19,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:19,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 22:17:19,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 22:17:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 22:17:19,911 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:20,046 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-12-16 22:17:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 22:17:20,048 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-16 22:17:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:20,049 INFO L225 Difference]: With dead ends: 86 [2021-12-16 22:17:20,049 INFO L226 Difference]: Without dead ends: 52 [2021-12-16 22:17:20,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 22:17:20,050 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:20,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 86 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-16 22:17:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-12-16 22:17:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-12-16 22:17:20,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2021-12-16 22:17:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:20,053 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-12-16 22:17:20,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-12-16 22:17:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 22:17:20,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:20,054 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:20,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-16 22:17:20,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:20,267 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:20,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:20,268 INFO L85 PathProgramCache]: Analyzing trace with hash 814558120, now seen corresponding path program 17 times [2021-12-16 22:17:20,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:20,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104037209] [2021-12-16 22:17:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:20,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:20,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104037209] [2021-12-16 22:17:20,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104037209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866861180] [2021-12-16 22:17:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:17:20,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:20,547 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:20,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 22:17:20,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-16 22:17:20,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 22:17:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:20,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:21,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:21,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:21,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:21,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866861180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:21,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:21,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 35 [2021-12-16 22:17:21,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679670353] [2021-12-16 22:17:21,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:21,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 22:17:21,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:21,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 22:17:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 22:17:21,187 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:21,663 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-12-16 22:17:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 22:17:21,664 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-16 22:17:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:21,664 INFO L225 Difference]: With dead ends: 53 [2021-12-16 22:17:21,664 INFO L226 Difference]: Without dead ends: 51 [2021-12-16 22:17:21,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 22:17:21,666 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:21,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 313 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:17:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-16 22:17:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-12-16 22:17:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-12-16 22:17:21,670 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2021-12-16 22:17:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:21,670 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-12-16 22:17:21,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-12-16 22:17:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 22:17:21,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:21,671 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:21,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-16 22:17:21,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:21,883 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash -59476011, now seen corresponding path program 18 times [2021-12-16 22:17:21,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:21,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92101079] [2021-12-16 22:17:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:21,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:22,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92101079] [2021-12-16 22:17:22,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92101079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863428252] [2021-12-16 22:17:22,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:17:22,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:22,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:22,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:22,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 22:17:22,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-16 22:17:22,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:17:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:22,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:22,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863428252] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:22,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:22,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-12-16 22:17:22,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126763880] [2021-12-16 22:17:22,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:22,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-16 22:17:22,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:22,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-16 22:17:22,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:17:22,653 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:22,831 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-12-16 22:17:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 22:17:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-16 22:17:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:22,831 INFO L225 Difference]: With dead ends: 93 [2021-12-16 22:17:22,831 INFO L226 Difference]: Without dead ends: 56 [2021-12-16 22:17:22,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 22:17:22,832 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 102 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:22,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 136 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-16 22:17:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-12-16 22:17:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-12-16 22:17:22,836 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2021-12-16 22:17:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:22,836 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-12-16 22:17:22,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-12-16 22:17:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 22:17:22,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:22,837 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:22,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:23,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:23,037 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1204565259, now seen corresponding path program 19 times [2021-12-16 22:17:23,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:23,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926303529] [2021-12-16 22:17:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:23,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:23,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:23,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926303529] [2021-12-16 22:17:23,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926303529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:23,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403773035] [2021-12-16 22:17:23,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:17:23,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:23,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:23,349 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:23,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 22:17:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:23,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-16 22:17:23,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:23,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:23,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:23,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:23,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:23,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403773035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:23,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:23,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2021-12-16 22:17:23,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172658079] [2021-12-16 22:17:23,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:23,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-16 22:17:23,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-16 22:17:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1310, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:17:23,950 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:24,516 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-12-16 22:17:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 22:17:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 22:17:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:24,517 INFO L225 Difference]: With dead ends: 57 [2021-12-16 22:17:24,517 INFO L226 Difference]: Without dead ends: 55 [2021-12-16 22:17:24,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2021-12-16 22:17:24,520 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:24,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 365 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:17:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-16 22:17:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-12-16 22:17:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-16 22:17:24,527 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2021-12-16 22:17:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:24,528 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-16 22:17:24,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-16 22:17:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 22:17:24,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:24,528 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:24,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:24,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 22:17:24,739 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash 756666258, now seen corresponding path program 20 times [2021-12-16 22:17:24,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:24,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694578901] [2021-12-16 22:17:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:24,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:24,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694578901] [2021-12-16 22:17:24,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694578901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461486579] [2021-12-16 22:17:24,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:24,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:24,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:24,937 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:24,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 22:17:25,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:25,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:25,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 22:17:25,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:25,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:25,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461486579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:25,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:25,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-12-16 22:17:25,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429618216] [2021-12-16 22:17:25,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:25,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 22:17:25,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 22:17:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 22:17:25,439 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:25,630 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-12-16 22:17:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 22:17:25,631 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 22:17:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:25,631 INFO L225 Difference]: With dead ends: 100 [2021-12-16 22:17:25,631 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 22:17:25,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 22:17:25,632 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 128 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:25,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 115 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 22:17:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-12-16 22:17:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-12-16 22:17:25,636 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2021-12-16 22:17:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:25,636 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-12-16 22:17:25,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-12-16 22:17:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 22:17:25,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:25,637 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:25,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-16 22:17:25,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-16 22:17:25,847 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:25,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1598292424, now seen corresponding path program 21 times [2021-12-16 22:17:25,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:25,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728005143] [2021-12-16 22:17:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:25,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:26,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:26,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728005143] [2021-12-16 22:17:26,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728005143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:26,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963100139] [2021-12-16 22:17:26,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:17:26,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:26,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:26,202 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:26,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 22:17:26,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-16 22:17:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-16 22:17:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:26,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:17:27,411 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-16 22:17:27,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2021-12-16 22:17:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 176 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:27,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:28,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 22:17:28,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-12-16 22:17:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 165 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:28,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963100139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:28,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:28,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 81 [2021-12-16 22:17:28,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688108184] [2021-12-16 22:17:28,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:28,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-16 22:17:28,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-16 22:17:28,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=5886, Unknown=0, NotChecked=0, Total=6480 [2021-12-16 22:17:28,994 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 81 states, 81 states have (on average 1.876543209876543) internal successors, (152), 81 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:31,003 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2021-12-16 22:17:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-16 22:17:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.876543209876543) internal successors, (152), 81 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-16 22:17:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:31,004 INFO L225 Difference]: With dead ends: 100 [2021-12-16 22:17:31,004 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 22:17:31,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4566 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1666, Invalid=16966, Unknown=0, NotChecked=0, Total=18632 [2021-12-16 22:17:31,006 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:31,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 477 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1273 Invalid, 0 Unknown, 152 Unchecked, 0.5s Time] [2021-12-16 22:17:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 22:17:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-12-16 22:17:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-12-16 22:17:31,010 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-12-16 22:17:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:31,010 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-12-16 22:17:31,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.876543209876543) internal successors, (152), 81 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-12-16 22:17:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 22:17:31,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:31,010 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:31,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:31,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:31,211 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash -66153237, now seen corresponding path program 22 times [2021-12-16 22:17:31,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:31,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781686389] [2021-12-16 22:17:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:31,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:31,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:31,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781686389] [2021-12-16 22:17:31,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781686389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:31,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194808196] [2021-12-16 22:17:31,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:17:31,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:31,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:31,742 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:31,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 22:17:31,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:17:31,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:31,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-16 22:17:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:32,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:17:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:32,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:32,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:32,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:32,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194808196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:32,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:32,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2021-12-16 22:17:32,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223110718] [2021-12-16 22:17:32,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:32,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-16 22:17:32,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-16 22:17:32,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=4738, Unknown=0, NotChecked=0, Total=4970 [2021-12-16 22:17:32,957 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:34,068 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-12-16 22:17:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-16 22:17:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-16 22:17:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:34,069 INFO L225 Difference]: With dead ends: 65 [2021-12-16 22:17:34,069 INFO L226 Difference]: Without dead ends: 63 [2021-12-16 22:17:34,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=373, Invalid=7109, Unknown=0, NotChecked=0, Total=7482 [2021-12-16 22:17:34,070 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:34,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 684 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 22:17:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-16 22:17:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-12-16 22:17:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-12-16 22:17:34,074 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2021-12-16 22:17:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:34,074 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-12-16 22:17:34,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-12-16 22:17:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 22:17:34,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:34,075 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:34,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:34,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:34,287 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash 623698866, now seen corresponding path program 23 times [2021-12-16 22:17:34,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:34,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396040145] [2021-12-16 22:17:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:34,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:34,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396040145] [2021-12-16 22:17:34,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396040145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016732725] [2021-12-16 22:17:34,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:17:34,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:34,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:34,556 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:34,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 22:17:34,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-16 22:17:34,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:34,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 22:17:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:35,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:35,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016732725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:35,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:35,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-12-16 22:17:35,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311210972] [2021-12-16 22:17:35,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:35,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 22:17:35,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 22:17:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 22:17:35,217 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:35,434 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-12-16 22:17:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 22:17:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-16 22:17:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:35,435 INFO L225 Difference]: With dead ends: 114 [2021-12-16 22:17:35,435 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 22:17:35,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2021-12-16 22:17:35,436 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 160 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:35,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 135 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 22:17:35,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-12-16 22:17:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-12-16 22:17:35,442 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2021-12-16 22:17:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:35,442 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-12-16 22:17:35,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:35,442 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-12-16 22:17:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 22:17:35,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:35,443 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:35,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-16 22:17:35,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 22:17:35,658 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash 829718504, now seen corresponding path program 24 times [2021-12-16 22:17:35,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:35,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968849179] [2021-12-16 22:17:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:35,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:36,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968849179] [2021-12-16 22:17:36,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968849179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817701056] [2021-12-16 22:17:36,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:17:36,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:36,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:36,102 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:36,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 22:17:36,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-16 22:17:36,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:36,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 22:17:36,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:37,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:37,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:37,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:37,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817701056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:37,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:37,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 47 [2021-12-16 22:17:37,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589129101] [2021-12-16 22:17:37,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:37,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 22:17:37,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:37,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 22:17:37,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2042, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 22:17:37,242 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:38,071 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-12-16 22:17:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 22:17:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-16 22:17:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:38,071 INFO L225 Difference]: With dead ends: 69 [2021-12-16 22:17:38,072 INFO L226 Difference]: Without dead ends: 67 [2021-12-16 22:17:38,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=3794, Unknown=0, NotChecked=0, Total=4032 [2021-12-16 22:17:38,072 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:38,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 587 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 22:17:38,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-16 22:17:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-12-16 22:17:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-12-16 22:17:38,076 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2021-12-16 22:17:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:38,077 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-12-16 22:17:38,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-12-16 22:17:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 22:17:38,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:38,077 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:38,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:38,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 22:17:38,291 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash 611957653, now seen corresponding path program 25 times [2021-12-16 22:17:38,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:38,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781988962] [2021-12-16 22:17:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:38,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:38,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:38,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781988962] [2021-12-16 22:17:38,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781988962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:38,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995218303] [2021-12-16 22:17:38,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:17:38,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:38,579 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:38,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 22:17:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 22:17:38,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:39,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:39,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995218303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:39,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:39,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2021-12-16 22:17:39,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774433470] [2021-12-16 22:17:39,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:39,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 22:17:39,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:39,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 22:17:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 22:17:39,177 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:39,407 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2021-12-16 22:17:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 22:17:39,407 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-16 22:17:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:39,408 INFO L225 Difference]: With dead ends: 121 [2021-12-16 22:17:39,408 INFO L226 Difference]: Without dead ends: 72 [2021-12-16 22:17:39,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 22:17:39,412 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:39,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 119 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-16 22:17:39,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2021-12-16 22:17:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-12-16 22:17:39,416 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2021-12-16 22:17:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:39,416 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-12-16 22:17:39,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-12-16 22:17:39,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 22:17:39,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:39,417 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:39,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-16 22:17:39,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 22:17:39,617 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1317817547, now seen corresponding path program 26 times [2021-12-16 22:17:39,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:39,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431581494] [2021-12-16 22:17:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:39,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:40,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431581494] [2021-12-16 22:17:40,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431581494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481133398] [2021-12-16 22:17:40,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:40,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:40,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:40,130 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:40,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 22:17:40,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:40,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-16 22:17:40,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:40,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:40,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:40,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:40,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:41,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481133398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:41,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:41,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 50 [2021-12-16 22:17:41,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831389522] [2021-12-16 22:17:41,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:41,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 22:17:41,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 22:17:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2322, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 22:17:41,024 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:41,905 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-12-16 22:17:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-16 22:17:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-16 22:17:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:41,906 INFO L225 Difference]: With dead ends: 73 [2021-12-16 22:17:41,906 INFO L226 Difference]: Without dead ends: 71 [2021-12-16 22:17:41,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=4303, Unknown=0, NotChecked=0, Total=4556 [2021-12-16 22:17:41,907 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:41,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 658 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 22:17:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-16 22:17:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-12-16 22:17:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-16 22:17:41,911 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2021-12-16 22:17:41,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:41,912 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-16 22:17:41,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-16 22:17:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 22:17:41,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:41,912 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:41,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:42,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 22:17:42,115 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1188716590, now seen corresponding path program 27 times [2021-12-16 22:17:42,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:42,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553653839] [2021-12-16 22:17:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:42,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:42,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:42,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553653839] [2021-12-16 22:17:42,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553653839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:42,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286120065] [2021-12-16 22:17:42,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:17:42,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:42,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:42,436 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:42,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-16 22:17:42,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-16 22:17:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 22:17:42,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:43,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:43,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286120065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:43,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:43,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2021-12-16 22:17:43,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753371463] [2021-12-16 22:17:43,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:43,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 22:17:43,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 22:17:43,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 22:17:43,552 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:43,801 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-12-16 22:17:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 22:17:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-16 22:17:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:43,802 INFO L225 Difference]: With dead ends: 128 [2021-12-16 22:17:43,802 INFO L226 Difference]: Without dead ends: 76 [2021-12-16 22:17:43,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2021-12-16 22:17:43,803 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 180 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:43,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 170 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-16 22:17:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-12-16 22:17:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-12-16 22:17:43,807 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2021-12-16 22:17:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:43,808 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-12-16 22:17:43,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-12-16 22:17:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 22:17:43,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:43,808 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:43,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:44,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:44,009 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2004834808, now seen corresponding path program 28 times [2021-12-16 22:17:44,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:44,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377183532] [2021-12-16 22:17:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:44,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:44,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:44,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377183532] [2021-12-16 22:17:44,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377183532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:44,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711445550] [2021-12-16 22:17:44,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:17:44,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:44,546 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:44,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-16 22:17:44,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:17:44,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-16 22:17:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:44,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:45,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:45,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:45,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:45,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711445550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:45,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:45,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 53 [2021-12-16 22:17:45,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844782228] [2021-12-16 22:17:45,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:45,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 22:17:45,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:45,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 22:17:45,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2620, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 22:17:45,529 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:46,547 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-12-16 22:17:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-16 22:17:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-16 22:17:46,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:46,555 INFO L225 Difference]: With dead ends: 77 [2021-12-16 22:17:46,555 INFO L226 Difference]: Without dead ends: 75 [2021-12-16 22:17:46,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=268, Invalid=4844, Unknown=0, NotChecked=0, Total=5112 [2021-12-16 22:17:46,556 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:46,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 750 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2295 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 22:17:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-16 22:17:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-12-16 22:17:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-12-16 22:17:46,561 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2021-12-16 22:17:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:46,561 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-12-16 22:17:46,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-12-16 22:17:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 22:17:46,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:46,562 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:46,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-16 22:17:46,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:46,775 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash -213753483, now seen corresponding path program 29 times [2021-12-16 22:17:46,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:46,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934418180] [2021-12-16 22:17:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:46,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:47,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:47,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934418180] [2021-12-16 22:17:47,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934418180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:47,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82768307] [2021-12-16 22:17:47,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:17:47,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:47,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:47,124 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:47,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-16 22:17:47,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-12-16 22:17:47,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:47,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 22:17:47,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:47,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:48,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82768307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:48,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:48,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2021-12-16 22:17:48,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803433145] [2021-12-16 22:17:48,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:48,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-16 22:17:48,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-16 22:17:48,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-12-16 22:17:48,055 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:48,309 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-12-16 22:17:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-16 22:17:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-16 22:17:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:48,310 INFO L225 Difference]: With dead ends: 135 [2021-12-16 22:17:48,310 INFO L226 Difference]: Without dead ends: 80 [2021-12-16 22:17:48,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2021-12-16 22:17:48,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 262 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:48,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 152 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-16 22:17:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-12-16 22:17:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-12-16 22:17:48,318 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2021-12-16 22:17:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:48,318 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-12-16 22:17:48,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-12-16 22:17:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 22:17:48,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:48,319 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:48,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:48,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-16 22:17:48,526 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash -190620501, now seen corresponding path program 30 times [2021-12-16 22:17:48,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335621078] [2021-12-16 22:17:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:48,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:49,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:49,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335621078] [2021-12-16 22:17:49,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335621078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:49,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548212515] [2021-12-16 22:17:49,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:17:49,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:49,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:49,250 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:49,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-16 22:17:49,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-16 22:17:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-16 22:17:49,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:50,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:17:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:51,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:51,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:51,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:51,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548212515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:51,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:51,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2021-12-16 22:17:51,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049524] [2021-12-16 22:17:51,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:51,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-16 22:17:51,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-16 22:17:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=7938, Unknown=0, NotChecked=0, Total=8190 [2021-12-16 22:17:51,986 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:54,466 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-12-16 22:17:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-16 22:17:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-16 22:17:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:54,467 INFO L225 Difference]: With dead ends: 81 [2021-12-16 22:17:54,467 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 22:17:54,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=549, Invalid=15201, Unknown=0, NotChecked=0, Total=15750 [2021-12-16 22:17:54,468 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:54,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1096 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 22:17:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 22:17:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-12-16 22:17:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-12-16 22:17:54,474 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2021-12-16 22:17:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:54,474 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-12-16 22:17:54,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-12-16 22:17:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-16 22:17:54,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:54,474 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:54,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:54,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:54,691 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -823786510, now seen corresponding path program 31 times [2021-12-16 22:17:54,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:54,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658192480] [2021-12-16 22:17:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:54,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:55,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658192480] [2021-12-16 22:17:55,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658192480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303422674] [2021-12-16 22:17:55,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:17:55,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:55,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:55,087 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:55,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-16 22:17:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 22:17:55,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:55,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:55,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303422674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:55,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:55,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2021-12-16 22:17:55,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360162890] [2021-12-16 22:17:55,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:55,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-16 22:17:55,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-16 22:17:55,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2021-12-16 22:17:55,872 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:56,186 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2021-12-16 22:17:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-16 22:17:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-16 22:17:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:56,187 INFO L225 Difference]: With dead ends: 142 [2021-12-16 22:17:56,187 INFO L226 Difference]: Without dead ends: 84 [2021-12-16 22:17:56,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2021-12-16 22:17:56,187 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 176 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:56,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 200 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:17:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-16 22:17:56,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-12-16 22:17:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-12-16 22:17:56,193 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2021-12-16 22:17:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:56,193 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-12-16 22:17:56,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-12-16 22:17:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 22:17:56,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:56,193 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:56,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:56,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:56,394 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:56,394 INFO L85 PathProgramCache]: Analyzing trace with hash -196447192, now seen corresponding path program 32 times [2021-12-16 22:17:56,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:56,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764083336] [2021-12-16 22:17:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:56,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:57,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764083336] [2021-12-16 22:17:57,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764083336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235171734] [2021-12-16 22:17:57,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:57,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:57,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:57,072 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:17:57,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-16 22:17:57,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:57,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-16 22:17:57,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:57,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:17:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:57,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:58,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:17:58,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:17:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:17:58,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235171734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:58,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:58,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 59 [2021-12-16 22:17:58,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263140868] [2021-12-16 22:17:58,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:58,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-16 22:17:58,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:58,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-16 22:17:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3270, Unknown=0, NotChecked=0, Total=3422 [2021-12-16 22:17:58,215 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:59,383 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-12-16 22:17:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-16 22:17:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-16 22:17:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:59,384 INFO L225 Difference]: With dead ends: 85 [2021-12-16 22:17:59,384 INFO L226 Difference]: Without dead ends: 83 [2021-12-16 22:17:59,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=298, Invalid=6022, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 22:17:59,385 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:59,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 913 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 22:17:59,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-16 22:17:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-12-16 22:17:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-12-16 22:17:59,390 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2021-12-16 22:17:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:59,390 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-12-16 22:17:59,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-12-16 22:17:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 22:17:59,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:59,391 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:59,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-16 22:17:59,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-16 22:17:59,608 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1686921045, now seen corresponding path program 33 times [2021-12-16 22:17:59,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:59,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143850345] [2021-12-16 22:17:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:59,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:00,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143850345] [2021-12-16 22:18:00,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143850345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926011554] [2021-12-16 22:18:00,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:18:00,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:00,023 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:00,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-16 22:18:01,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-16 22:18:01,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:01,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 22:18:01,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:02,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:02,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926011554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:02,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:02,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2021-12-16 22:18:02,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987236957] [2021-12-16 22:18:02,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:02,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-16 22:18:02,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-16 22:18:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 22:18:02,411 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:02,709 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-12-16 22:18:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-16 22:18:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-16 22:18:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:02,710 INFO L225 Difference]: With dead ends: 149 [2021-12-16 22:18:02,710 INFO L226 Difference]: Without dead ends: 88 [2021-12-16 22:18:02,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2021-12-16 22:18:02,711 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 230 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:02,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 158 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:18:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-16 22:18:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-12-16 22:18:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-12-16 22:18:02,717 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2021-12-16 22:18:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:02,717 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-12-16 22:18:02,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-12-16 22:18:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 22:18:02,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:02,721 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:02,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-16 22:18:02,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-16 22:18:02,931 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:02,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1697760395, now seen corresponding path program 34 times [2021-12-16 22:18:02,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:02,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428725028] [2021-12-16 22:18:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:02,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:03,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428725028] [2021-12-16 22:18:03,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428725028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981051929] [2021-12-16 22:18:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:18:03,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:03,634 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:03,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-16 22:18:03,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:18:03,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-16 22:18:03,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:03,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:18:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:04,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:04,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:18:04,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:18:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:04,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981051929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:04,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:04,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 62 [2021-12-16 22:18:04,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400979757] [2021-12-16 22:18:04,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:04,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-16 22:18:04,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-16 22:18:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3622, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 22:18:04,938 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:06,340 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-12-16 22:18:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 22:18:06,341 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 22:18:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:06,341 INFO L225 Difference]: With dead ends: 89 [2021-12-16 22:18:06,341 INFO L226 Difference]: Without dead ends: 87 [2021-12-16 22:18:06,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=313, Invalid=6659, Unknown=0, NotChecked=0, Total=6972 [2021-12-16 22:18:06,342 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 3283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:06,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1040 Invalid, 3283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 22:18:06,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-16 22:18:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-12-16 22:18:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-12-16 22:18:06,348 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2021-12-16 22:18:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:06,348 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-12-16 22:18:06,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-12-16 22:18:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 22:18:06,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:06,349 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:06,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:06,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-16 22:18:06,552 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash 449843218, now seen corresponding path program 35 times [2021-12-16 22:18:06,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:06,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215244663] [2021-12-16 22:18:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:06,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:07,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:07,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215244663] [2021-12-16 22:18:07,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215244663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:07,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488372518] [2021-12-16 22:18:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:18:07,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:07,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:07,017 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:07,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-16 22:18:07,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-16 22:18:07,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:07,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 22:18:07,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:08,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:08,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488372518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:08,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:08,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2021-12-16 22:18:08,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769382220] [2021-12-16 22:18:08,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:08,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-16 22:18:08,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-16 22:18:08,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 22:18:08,186 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:08,510 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-12-16 22:18:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-16 22:18:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-16 22:18:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:08,511 INFO L225 Difference]: With dead ends: 156 [2021-12-16 22:18:08,511 INFO L226 Difference]: Without dead ends: 92 [2021-12-16 22:18:08,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2021-12-16 22:18:08,512 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 244 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:08,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 180 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:18:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-16 22:18:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-12-16 22:18:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-12-16 22:18:08,518 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2021-12-16 22:18:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:08,518 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-12-16 22:18:08,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-12-16 22:18:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 22:18:08,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:08,518 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:08,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:08,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:08,719 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:08,719 INFO L85 PathProgramCache]: Analyzing trace with hash -751572408, now seen corresponding path program 36 times [2021-12-16 22:18:08,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:08,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529455179] [2021-12-16 22:18:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:08,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:09,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:09,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529455179] [2021-12-16 22:18:09,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529455179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:09,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348266875] [2021-12-16 22:18:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:18:09,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:09,613 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:09,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-16 22:18:10,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-12-16 22:18:10,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:10,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-16 22:18:10,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:10,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:18:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:10,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:11,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:18:11,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:18:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:11,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348266875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:11,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:11,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 65 [2021-12-16 22:18:11,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969466781] [2021-12-16 22:18:11,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:11,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-16 22:18:11,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-16 22:18:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 22:18:11,420 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 65 states, 65 states have (on average 2.246153846153846) internal successors, (146), 65 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:13,077 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-12-16 22:18:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-16 22:18:13,078 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.246153846153846) internal successors, (146), 65 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-16 22:18:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:13,078 INFO L225 Difference]: With dead ends: 93 [2021-12-16 22:18:13,078 INFO L226 Difference]: Without dead ends: 91 [2021-12-16 22:18:13,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=328, Invalid=7328, Unknown=0, NotChecked=0, Total=7656 [2021-12-16 22:18:13,080 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 3289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:13,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1073 Invalid, 3289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 22:18:13,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-16 22:18:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-12-16 22:18:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-16 22:18:13,087 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2021-12-16 22:18:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:13,088 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-16 22:18:13,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.246153846153846) internal successors, (146), 65 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-16 22:18:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 22:18:13,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:13,088 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:13,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:13,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-16 22:18:13,307 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash -424299211, now seen corresponding path program 37 times [2021-12-16 22:18:13,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:13,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084671277] [2021-12-16 22:18:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:13,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:13,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:13,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084671277] [2021-12-16 22:18:13,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084671277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:13,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509679630] [2021-12-16 22:18:13,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:18:13,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:13,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:13,817 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:13,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-16 22:18:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:13,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:18:13,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:14,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:14,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509679630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:14,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:14,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2021-12-16 22:18:14,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684454401] [2021-12-16 22:18:14,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:14,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-16 22:18:14,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-16 22:18:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2021-12-16 22:18:14,818 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:15,135 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2021-12-16 22:18:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 22:18:15,135 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-16 22:18:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:15,136 INFO L225 Difference]: With dead ends: 163 [2021-12-16 22:18:15,136 INFO L226 Difference]: Without dead ends: 96 [2021-12-16 22:18:15,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2021-12-16 22:18:15,137 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 246 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:15,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 180 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:18:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-16 22:18:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-12-16 22:18:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-12-16 22:18:15,143 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2021-12-16 22:18:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:15,143 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-12-16 22:18:15,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-12-16 22:18:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 22:18:15,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:15,144 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:15,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:15,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-16 22:18:15,344 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1198160789, now seen corresponding path program 38 times [2021-12-16 22:18:15,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:15,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757644489] [2021-12-16 22:18:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:15,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:16,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:16,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757644489] [2021-12-16 22:18:16,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757644489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:16,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414673051] [2021-12-16 22:18:16,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:18:16,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:16,340 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:16,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-16 22:18:16,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:18:16,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:16,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-16 22:18:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:17,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:18:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:18,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:19,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:18:19,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:18:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:19,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414673051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:19,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:19,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 111 [2021-12-16 22:18:19,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347092624] [2021-12-16 22:18:19,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:19,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-12-16 22:18:19,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:19,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-12-16 22:18:19,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=11902, Unknown=0, NotChecked=0, Total=12210 [2021-12-16 22:18:19,791 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 111 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:23,491 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-12-16 22:18:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-16 22:18:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-16 22:18:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:23,492 INFO L225 Difference]: With dead ends: 97 [2021-12-16 22:18:23,492 INFO L226 Difference]: Without dead ends: 95 [2021-12-16 22:18:23,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=673, Invalid=22889, Unknown=0, NotChecked=0, Total=23562 [2021-12-16 22:18:23,493 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 4889 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 5021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:23,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1637 Invalid, 5021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4889 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 22:18:23,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-16 22:18:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-12-16 22:18:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-12-16 22:18:23,499 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2021-12-16 22:18:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:23,504 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-12-16 22:18:23,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-12-16 22:18:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 22:18:23,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:23,504 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:23,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:23,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:23,705 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1069925426, now seen corresponding path program 39 times [2021-12-16 22:18:23,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:23,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322296243] [2021-12-16 22:18:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:23,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:24,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:24,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322296243] [2021-12-16 22:18:24,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322296243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:24,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584786738] [2021-12-16 22:18:24,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:18:24,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:24,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:24,244 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:24,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-16 22:18:26,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-16 22:18:26,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:26,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-16 22:18:26,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:27,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:27,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584786738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:27,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:27,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2021-12-16 22:18:27,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873205498] [2021-12-16 22:18:27,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:27,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-16 22:18:27,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:27,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-16 22:18:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2021-12-16 22:18:27,221 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:27,570 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-12-16 22:18:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-16 22:18:27,570 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-16 22:18:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:27,571 INFO L225 Difference]: With dead ends: 170 [2021-12-16 22:18:27,571 INFO L226 Difference]: Without dead ends: 100 [2021-12-16 22:18:27,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2021-12-16 22:18:27,572 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 292 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:27,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 180 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:18:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-16 22:18:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-12-16 22:18:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-12-16 22:18:27,579 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2021-12-16 22:18:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:27,579 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-12-16 22:18:27,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-12-16 22:18:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 22:18:27,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:27,580 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:27,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:27,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-16 22:18:27,795 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1914636392, now seen corresponding path program 40 times [2021-12-16 22:18:27,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:27,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022350280] [2021-12-16 22:18:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:27,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:28,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022350280] [2021-12-16 22:18:28,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022350280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498673170] [2021-12-16 22:18:28,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:18:28,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:28,703 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:28,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-16 22:18:28,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:18:28,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-16 22:18:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:28,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:18:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:29,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:30,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:18:30,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:18:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:30,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498673170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:30,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:30,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 71 [2021-12-16 22:18:30,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668740179] [2021-12-16 22:18:30,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:30,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-16 22:18:30,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-16 22:18:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=4786, Unknown=0, NotChecked=0, Total=4970 [2021-12-16 22:18:30,239 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 71 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:32,064 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-12-16 22:18:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-16 22:18:32,065 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 71 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-16 22:18:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:32,065 INFO L225 Difference]: With dead ends: 101 [2021-12-16 22:18:32,065 INFO L226 Difference]: Without dead ends: 99 [2021-12-16 22:18:32,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=358, Invalid=8762, Unknown=0, NotChecked=0, Total=9120 [2021-12-16 22:18:32,066 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 4501 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 4591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:32,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1450 Invalid, 4591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 4501 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 22:18:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-16 22:18:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-12-16 22:18:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-12-16 22:18:32,073 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2021-12-16 22:18:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:32,074 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-12-16 22:18:32,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 71 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-12-16 22:18:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 22:18:32,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:32,074 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:32,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-16 22:18:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:32,280 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1771856661, now seen corresponding path program 41 times [2021-12-16 22:18:32,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:32,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554803917] [2021-12-16 22:18:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:32,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:32,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554803917] [2021-12-16 22:18:32,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554803917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029559584] [2021-12-16 22:18:32,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:18:32,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:32,840 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:32,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-16 22:18:33,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-12-16 22:18:33,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 22:18:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:34,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:34,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029559584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:34,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:34,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2021-12-16 22:18:34,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865583927] [2021-12-16 22:18:34,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:34,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-16 22:18:34,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-16 22:18:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2021-12-16 22:18:34,311 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:34,692 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2021-12-16 22:18:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-16 22:18:34,692 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-16 22:18:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:34,693 INFO L225 Difference]: With dead ends: 177 [2021-12-16 22:18:34,693 INFO L226 Difference]: Without dead ends: 104 [2021-12-16 22:18:34,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2021-12-16 22:18:34,694 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 342 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:34,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 203 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:18:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-16 22:18:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-12-16 22:18:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-12-16 22:18:34,701 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2021-12-16 22:18:34,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:34,701 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-12-16 22:18:34,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-12-16 22:18:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 22:18:34,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:34,702 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:34,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:34,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:34,906 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:34,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953717, now seen corresponding path program 42 times [2021-12-16 22:18:34,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:34,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317382035] [2021-12-16 22:18:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:34,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:35,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:35,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317382035] [2021-12-16 22:18:35,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317382035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:35,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281370814] [2021-12-16 22:18:35,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:18:35,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:35,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:35,880 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:35,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-16 22:18:37,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-12-16 22:18:37,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:37,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-16 22:18:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:37,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:18:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:38,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:38,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:18:39,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:18:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:39,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281370814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:39,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:39,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 74 [2021-12-16 22:18:39,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636632668] [2021-12-16 22:18:39,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:39,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-16 22:18:39,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-16 22:18:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2021-12-16 22:18:39,088 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 74 states, 74 states have (on average 2.27027027027027) internal successors, (168), 74 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:40,970 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2021-12-16 22:18:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-16 22:18:40,970 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.27027027027027) internal successors, (168), 74 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-16 22:18:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:40,971 INFO L225 Difference]: With dead ends: 105 [2021-12-16 22:18:40,971 INFO L226 Difference]: Without dead ends: 103 [2021-12-16 22:18:40,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=373, Invalid=9527, Unknown=0, NotChecked=0, Total=9900 [2021-12-16 22:18:40,975 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 4616 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 4711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:40,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1509 Invalid, 4711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4616 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 22:18:40,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-16 22:18:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-12-16 22:18:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-12-16 22:18:40,983 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2021-12-16 22:18:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:40,983 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-12-16 22:18:40,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.27027027027027) internal successors, (168), 74 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-12-16 22:18:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 22:18:40,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:40,984 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:41,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-16 22:18:41,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-16 22:18:41,185 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:41,185 INFO L85 PathProgramCache]: Analyzing trace with hash -282517422, now seen corresponding path program 43 times [2021-12-16 22:18:41,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:41,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654594990] [2021-12-16 22:18:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:41,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:41,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:41,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654594990] [2021-12-16 22:18:41,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654594990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:41,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616958938] [2021-12-16 22:18:41,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:18:41,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:41,780 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:41,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-16 22:18:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-16 22:18:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:42,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:42,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616958938] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:42,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:42,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2021-12-16 22:18:42,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445366974] [2021-12-16 22:18:42,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:42,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-16 22:18:42,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:42,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-16 22:18:42,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2021-12-16 22:18:42,975 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:43,364 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-12-16 22:18:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-16 22:18:43,364 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-16 22:18:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:43,365 INFO L225 Difference]: With dead ends: 184 [2021-12-16 22:18:43,365 INFO L226 Difference]: Without dead ends: 108 [2021-12-16 22:18:43,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2021-12-16 22:18:43,366 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 296 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:43,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 210 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:18:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-16 22:18:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2021-12-16 22:18:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-12-16 22:18:43,374 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2021-12-16 22:18:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:43,374 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-12-16 22:18:43,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-12-16 22:18:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-16 22:18:43,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:43,375 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:43,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-16 22:18:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-16 22:18:43,579 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash 745393800, now seen corresponding path program 44 times [2021-12-16 22:18:43,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375686391] [2021-12-16 22:18:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:43,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:44,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:44,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375686391] [2021-12-16 22:18:44,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375686391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:44,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860178846] [2021-12-16 22:18:44,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:18:44,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:44,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:44,677 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:44,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-16 22:18:44,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:18:44,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-16 22:18:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:44,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:18:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:46,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:46,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:18:46,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:18:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:46,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860178846] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:46,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:46,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 77 [2021-12-16 22:18:46,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503132360] [2021-12-16 22:18:46,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:46,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-16 22:18:46,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-16 22:18:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=5652, Unknown=0, NotChecked=0, Total=5852 [2021-12-16 22:18:46,393 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:48,447 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-12-16 22:18:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-16 22:18:48,447 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-16 22:18:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:48,447 INFO L225 Difference]: With dead ends: 109 [2021-12-16 22:18:48,448 INFO L226 Difference]: Without dead ends: 107 [2021-12-16 22:18:48,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=388, Invalid=10324, Unknown=0, NotChecked=0, Total=10712 [2021-12-16 22:18:48,448 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 4978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:48,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1598 Invalid, 4978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4879 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 22:18:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-16 22:18:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-12-16 22:18:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-12-16 22:18:48,457 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2021-12-16 22:18:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:48,457 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-12-16 22:18:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:18:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-12-16 22:18:48,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-16 22:18:48,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:48,458 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:48,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-16 22:18:48,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-16 22:18:48,663 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1050568949, now seen corresponding path program 45 times [2021-12-16 22:18:48,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:48,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182873058] [2021-12-16 22:18:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:48,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:18:49,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:49,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182873058] [2021-12-16 22:18:49,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182873058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:49,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109925725] [2021-12-16 22:18:49,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:18:49,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:49,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:49,366 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:49,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-16 22:19:01,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-12-16 22:19:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:19:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 22:19:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:02,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:19:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109925725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:19:02,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:19:02,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2021-12-16 22:19:02,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992363248] [2021-12-16 22:19:02,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:19:02,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-16 22:19:02,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:19:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-16 22:19:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 22:19:02,510 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:02,940 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-12-16 22:19:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-16 22:19:02,941 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-16 22:19:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:02,941 INFO L225 Difference]: With dead ends: 191 [2021-12-16 22:19:02,941 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 22:19:02,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2511, Invalid=8409, Unknown=0, NotChecked=0, Total=10920 [2021-12-16 22:19:02,942 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 286 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:02,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 260 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:19:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 22:19:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2021-12-16 22:19:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-12-16 22:19:02,951 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2021-12-16 22:19:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:02,951 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-12-16 22:19:02,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-12-16 22:19:02,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-16 22:19:02,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:02,952 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:02,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-16 22:19:03,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:03,153 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:03,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:03,153 INFO L85 PathProgramCache]: Analyzing trace with hash -791344085, now seen corresponding path program 46 times [2021-12-16 22:19:03,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:03,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936021524] [2021-12-16 22:19:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:03,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:04,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936021524] [2021-12-16 22:19:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936021524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222265785] [2021-12-16 22:19:04,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:19:04,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:04,437 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:19:04,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-16 22:19:04,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:19:04,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:19:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-16 22:19:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:05,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:19:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:07,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:19:08,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:19:08,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:19:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:09,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222265785] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:19:09,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:19:09,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 131 [2021-12-16 22:19:09,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851661264] [2021-12-16 22:19:09,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:19:09,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-16 22:19:09,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:19:09,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-16 22:19:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=16666, Unknown=0, NotChecked=0, Total=17030 [2021-12-16 22:19:09,006 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 131 states, 131 states have (on average 2.145038167938931) internal successors, (281), 131 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:14,030 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-12-16 22:19:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-16 22:19:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.145038167938931) internal successors, (281), 131 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-16 22:19:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:14,031 INFO L225 Difference]: With dead ends: 113 [2021-12-16 22:19:14,031 INFO L226 Difference]: Without dead ends: 111 [2021-12-16 22:19:14,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4129 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=797, Invalid=32145, Unknown=0, NotChecked=0, Total=32942 [2021-12-16 22:19:14,032 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 6851 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 7008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 6851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:14,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2317 Invalid, 7008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 6851 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 22:19:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-16 22:19:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-12-16 22:19:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-12-16 22:19:14,041 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2021-12-16 22:19:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:14,042 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-12-16 22:19:14,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.145038167938931) internal successors, (281), 131 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-12-16 22:19:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-16 22:19:14,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:14,042 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:14,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-16 22:19:14,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-16 22:19:14,260 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash 148644978, now seen corresponding path program 47 times [2021-12-16 22:19:14,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:14,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136706906] [2021-12-16 22:19:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:14,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:14,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136706906] [2021-12-16 22:19:14,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136706906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486638030] [2021-12-16 22:19:14,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:19:14,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:14,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:14,959 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:19:14,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-16 22:19:15,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-16 22:19:15,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:19:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-16 22:19:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:16,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:19:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:17,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486638030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:19:17,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:19:17,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2021-12-16 22:19:17,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882380766] [2021-12-16 22:19:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:19:17,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-16 22:19:17,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:19:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-16 22:19:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2021-12-16 22:19:17,131 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:17,603 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2021-12-16 22:19:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-16 22:19:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-16 22:19:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:17,604 INFO L225 Difference]: With dead ends: 198 [2021-12-16 22:19:17,605 INFO L226 Difference]: Without dead ends: 116 [2021-12-16 22:19:17,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2955 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2702, Invalid=9070, Unknown=0, NotChecked=0, Total=11772 [2021-12-16 22:19:17,606 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 376 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:17,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 252 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:19:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-16 22:19:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-12-16 22:19:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-12-16 22:19:17,615 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2021-12-16 22:19:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:17,615 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-12-16 22:19:17,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-12-16 22:19:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 22:19:17,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:17,616 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:17,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-16 22:19:17,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-16 22:19:17,817 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:17,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1946010456, now seen corresponding path program 48 times [2021-12-16 22:19:17,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:17,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835725491] [2021-12-16 22:19:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:17,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:19,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835725491] [2021-12-16 22:19:19,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835725491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:19,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336096864] [2021-12-16 22:19:19,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:19:19,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:19,076 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:19:19,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-16 22:19:21,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-12-16 22:19:21,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:19:21,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-16 22:19:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:21,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:19:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:23,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:19:23,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:19:23,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:19:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336096864] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:19:23,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:19:23,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 83 [2021-12-16 22:19:23,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403320418] [2021-12-16 22:19:23,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:19:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-16 22:19:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:19:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-16 22:19:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=6590, Unknown=0, NotChecked=0, Total=6806 [2021-12-16 22:19:23,409 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 83 states, 83 states have (on average 2.2771084337349397) internal successors, (189), 83 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:25,743 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-12-16 22:19:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-16 22:19:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.2771084337349397) internal successors, (189), 83 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-16 22:19:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:25,744 INFO L225 Difference]: With dead ends: 117 [2021-12-16 22:19:25,744 INFO L226 Difference]: Without dead ends: 115 [2021-12-16 22:19:25,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 185 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=418, Invalid=12014, Unknown=0, NotChecked=0, Total=12432 [2021-12-16 22:19:25,745 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 5529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:25,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1761 Invalid, 5529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 22:19:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-16 22:19:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-12-16 22:19:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-12-16 22:19:25,759 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2021-12-16 22:19:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:25,759 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-12-16 22:19:25,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.2771084337349397) internal successors, (189), 83 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-12-16 22:19:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 22:19:25,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:25,760 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:25,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-16 22:19:25,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:25,961 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:25,961 INFO L85 PathProgramCache]: Analyzing trace with hash -124139819, now seen corresponding path program 49 times [2021-12-16 22:19:25,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:25,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506284860] [2021-12-16 22:19:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:25,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:26,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:26,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506284860] [2021-12-16 22:19:26,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506284860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:26,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948082484] [2021-12-16 22:19:26,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:19:26,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:26,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:26,721 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:19:26,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-16 22:19:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:26,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-16 22:19:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:28,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:19:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:28,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948082484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:19:28,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:19:28,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2021-12-16 22:19:28,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78194600] [2021-12-16 22:19:28,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:19:28,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-16 22:19:28,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:19:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-16 22:19:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5625, Unknown=0, NotChecked=0, Total=7310 [2021-12-16 22:19:28,179 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:28,670 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2021-12-16 22:19:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-16 22:19:28,670 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-16 22:19:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:28,671 INFO L225 Difference]: With dead ends: 205 [2021-12-16 22:19:28,671 INFO L226 Difference]: Without dead ends: 120 [2021-12-16 22:19:28,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3177 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2900, Invalid=9756, Unknown=0, NotChecked=0, Total=12656 [2021-12-16 22:19:28,673 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 302 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:28,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 272 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:19:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-16 22:19:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2021-12-16 22:19:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-12-16 22:19:28,684 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2021-12-16 22:19:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:28,684 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-12-16 22:19:28,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-12-16 22:19:28,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 22:19:28,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:28,685 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:28,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-16 22:19:28,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-16 22:19:28,902 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash -840117237, now seen corresponding path program 50 times [2021-12-16 22:19:28,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:28,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617340381] [2021-12-16 22:19:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:28,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:30,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617340381] [2021-12-16 22:19:30,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617340381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998413445] [2021-12-16 22:19:30,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:19:30,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:30,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:30,206 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:19:30,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-16 22:19:30,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:19:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:19:30,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-16 22:19:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:30,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:19:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:31,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:19:32,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:19:32,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:19:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:32,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998413445] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:19:32,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:19:32,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 86 [2021-12-16 22:19:32,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629481997] [2021-12-16 22:19:32,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:19:32,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-16 22:19:32,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:19:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-16 22:19:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=7086, Unknown=0, NotChecked=0, Total=7310 [2021-12-16 22:19:32,305 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 86 states, 86 states have (on average 2.2790697674418605) internal successors, (196), 86 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:34,832 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-12-16 22:19:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-16 22:19:34,832 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2790697674418605) internal successors, (196), 86 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-16 22:19:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:34,833 INFO L225 Difference]: With dead ends: 121 [2021-12-16 22:19:34,833 INFO L226 Difference]: Without dead ends: 119 [2021-12-16 22:19:34,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 193 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=433, Invalid=12907, Unknown=0, NotChecked=0, Total=13340 [2021-12-16 22:19:34,834 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 5963 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 6073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 5963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:34,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1991 Invalid, 6073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 5963 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-16 22:19:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-16 22:19:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-12-16 22:19:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-12-16 22:19:34,861 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2021-12-16 22:19:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:34,861 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-12-16 22:19:34,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2790697674418605) internal successors, (196), 86 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-12-16 22:19:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-16 22:19:34,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:34,862 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:34,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-16 22:19:35,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:35,075 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:35,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1153380206, now seen corresponding path program 51 times [2021-12-16 22:19:35,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:35,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960975965] [2021-12-16 22:19:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:35,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:35,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960975965] [2021-12-16 22:19:35,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960975965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34298740] [2021-12-16 22:19:35,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:19:35,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:35,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:35,901 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:19:35,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-16 22:19:49,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-16 22:19:49,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:19:49,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-16 22:19:49,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:50,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:19:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:50,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34298740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:19:50,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:19:50,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2021-12-16 22:19:50,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226395158] [2021-12-16 22:19:50,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:19:50,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-16 22:19:50,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:19:50,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-16 22:19:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=6029, Unknown=0, NotChecked=0, Total=7832 [2021-12-16 22:19:50,678 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:51,205 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-12-16 22:19:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-16 22:19:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-16 22:19:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:51,206 INFO L225 Difference]: With dead ends: 212 [2021-12-16 22:19:51,206 INFO L226 Difference]: Without dead ends: 124 [2021-12-16 22:19:51,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3105, Invalid=10467, Unknown=0, NotChecked=0, Total=13572 [2021-12-16 22:19:51,207 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 312 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:51,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 271 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:19:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-16 22:19:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-12-16 22:19:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-12-16 22:19:51,217 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2021-12-16 22:19:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:51,218 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-12-16 22:19:51,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-12-16 22:19:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 22:19:51,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:51,218 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:51,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-16 22:19:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-16 22:19:51,422 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1765692104, now seen corresponding path program 52 times [2021-12-16 22:19:51,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:51,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816819927] [2021-12-16 22:19:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:51,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:52,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:52,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816819927] [2021-12-16 22:19:52,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816819927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:52,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856925663] [2021-12-16 22:19:52,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:19:52,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:52,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:52,806 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:19:52,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-16 22:19:53,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:19:53,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:19:53,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-16 22:19:53,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:53,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:19:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:54,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:19:54,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:19:54,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:19:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:55,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856925663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:19:55,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:19:55,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 89 [2021-12-16 22:19:55,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453059321] [2021-12-16 22:19:55,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:19:55,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-16 22:19:55,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:19:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-16 22:19:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=7600, Unknown=0, NotChecked=0, Total=7832 [2021-12-16 22:19:55,083 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 89 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:57,747 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2021-12-16 22:19:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-16 22:19:57,750 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 89 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-16 22:19:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:57,750 INFO L225 Difference]: With dead ends: 125 [2021-12-16 22:19:57,750 INFO L226 Difference]: Without dead ends: 123 [2021-12-16 22:19:57,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 199 SyntacticMatches, 6 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=448, Invalid=13832, Unknown=0, NotChecked=0, Total=14280 [2021-12-16 22:19:57,751 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 37 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 6291 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 6406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 6291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:57,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2058 Invalid, 6406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 6291 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-16 22:19:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-16 22:19:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2021-12-16 22:19:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-12-16 22:19:57,761 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2021-12-16 22:19:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:57,761 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-12-16 22:19:57,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 89 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:19:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-12-16 22:19:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-16 22:19:57,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:57,762 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:57,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-16 22:19:57,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-16 22:19:57,963 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1273789621, now seen corresponding path program 53 times [2021-12-16 22:19:57,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:57,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331869874] [2021-12-16 22:19:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:57,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:19:58,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331869874] [2021-12-16 22:19:58,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331869874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316636384] [2021-12-16 22:19:58,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:19:58,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:58,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:58,837 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:19:58,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-16 22:20:02,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-12-16 22:20:02,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:20:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-16 22:20:02,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:20:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:03,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:20:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:03,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316636384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:20:03,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:20:03,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2021-12-16 22:20:03,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313825242] [2021-12-16 22:20:03,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:20:03,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-16 22:20:03,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:20:03,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-16 22:20:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6447, Unknown=0, NotChecked=0, Total=8372 [2021-12-16 22:20:03,813 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:20:04,367 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-12-16 22:20:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-16 22:20:04,368 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-16 22:20:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:20:04,368 INFO L225 Difference]: With dead ends: 219 [2021-12-16 22:20:04,368 INFO L226 Difference]: Without dead ends: 128 [2021-12-16 22:20:04,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3645 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3317, Invalid=11203, Unknown=0, NotChecked=0, Total=14520 [2021-12-16 22:20:04,369 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 402 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:20:04,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 299 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:20:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-16 22:20:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2021-12-16 22:20:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2021-12-16 22:20:04,380 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2021-12-16 22:20:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:20:04,380 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2021-12-16 22:20:04,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:04,380 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2021-12-16 22:20:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 22:20:04,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:20:04,381 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:20:04,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-16 22:20:04,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:04,583 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:20:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:20:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash -565054485, now seen corresponding path program 54 times [2021-12-16 22:20:04,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:20:04,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123242597] [2021-12-16 22:20:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:20:04,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:20:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:06,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:20:06,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123242597] [2021-12-16 22:20:06,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123242597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:20:06,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130419028] [2021-12-16 22:20:06,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:20:06,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:20:06,251 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:20:06,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-16 22:20:09,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-12-16 22:20:09,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:20:09,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-16 22:20:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:20:11,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:20:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:13,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:20:15,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:20:15,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:20:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:15,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130419028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:20:15,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:20:15,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 151 [2021-12-16 22:20:15,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812620468] [2021-12-16 22:20:15,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:20:15,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-12-16 22:20:15,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:20:15,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-12-16 22:20:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=22230, Unknown=0, NotChecked=0, Total=22650 [2021-12-16 22:20:15,752 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 151 states, 151 states have (on average 2.152317880794702) internal successors, (325), 151 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:20:22,462 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2021-12-16 22:20:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-16 22:20:22,463 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.152317880794702) internal successors, (325), 151 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-16 22:20:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:20:22,463 INFO L225 Difference]: With dead ends: 129 [2021-12-16 22:20:22,463 INFO L226 Difference]: Without dead ends: 127 [2021-12-16 22:20:22,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5485 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=921, Invalid=42969, Unknown=0, NotChecked=0, Total=43890 [2021-12-16 22:20:22,465 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 2997 mSDsCounter, 0 mSdLazyCounter, 9168 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 9289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 9168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:20:22,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3032 Invalid, 9289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 9168 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-16 22:20:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-16 22:20:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-12-16 22:20:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-12-16 22:20:22,477 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2021-12-16 22:20:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:20:22,478 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-12-16 22:20:22,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.152317880794702) internal successors, (325), 151 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-12-16 22:20:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-16 22:20:22,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:20:22,479 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:20:22,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-16 22:20:22,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:22,691 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:20:22,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:20:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1556536142, now seen corresponding path program 55 times [2021-12-16 22:20:22,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:20:22,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295297959] [2021-12-16 22:20:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:20:22,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:20:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:23,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:20:23,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295297959] [2021-12-16 22:20:23,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295297959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:20:23,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666963349] [2021-12-16 22:20:23,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:20:23,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:23,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:20:23,632 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:20:23,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-16 22:20:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:23,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-16 22:20:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:20:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:25,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:20:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:25,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666963349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:20:25,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:20:25,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2021-12-16 22:20:25,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502566627] [2021-12-16 22:20:25,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:20:25,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-16 22:20:25,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:20:25,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-16 22:20:25,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=6879, Unknown=0, NotChecked=0, Total=8930 [2021-12-16 22:20:25,322 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:20:25,882 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2021-12-16 22:20:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-16 22:20:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-16 22:20:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:20:25,883 INFO L225 Difference]: With dead ends: 226 [2021-12-16 22:20:25,883 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 22:20:25,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3891 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3536, Invalid=11964, Unknown=0, NotChecked=0, Total=15500 [2021-12-16 22:20:25,884 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 348 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:20:25,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 327 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:20:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 22:20:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-12-16 22:20:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-12-16 22:20:25,896 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2021-12-16 22:20:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:20:25,896 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-12-16 22:20:25,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-12-16 22:20:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-16 22:20:25,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:20:25,897 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:20:25,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-16 22:20:26,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:26,098 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:20:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:20:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash 184815848, now seen corresponding path program 56 times [2021-12-16 22:20:26,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:20:26,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829590796] [2021-12-16 22:20:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:20:26,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:20:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:27,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:20:27,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829590796] [2021-12-16 22:20:27,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829590796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:20:27,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014450935] [2021-12-16 22:20:27,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:20:27,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:20:27,693 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:20:27,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-16 22:20:27,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:20:27,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:20:27,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-16 22:20:27,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:20:28,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:20:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:29,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:20:30,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:20:30,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:20:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:30,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014450935] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:20:30,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:20:30,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 95 [2021-12-16 22:20:30,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123995147] [2021-12-16 22:20:30,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:20:30,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-16 22:20:30,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:20:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-16 22:20:30,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=8682, Unknown=0, NotChecked=0, Total=8930 [2021-12-16 22:20:30,186 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 95 states, 95 states have (on average 2.2842105263157895) internal successors, (217), 95 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:20:33,161 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-12-16 22:20:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-16 22:20:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2842105263157895) internal successors, (217), 95 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-16 22:20:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:20:33,162 INFO L225 Difference]: With dead ends: 133 [2021-12-16 22:20:33,162 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 22:20:33,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 212 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=478, Invalid=15778, Unknown=0, NotChecked=0, Total=16256 [2021-12-16 22:20:33,163 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 6998 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 7122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 6998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:20:33,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 2389 Invalid, 7122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 6998 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 22:20:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 22:20:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-12-16 22:20:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-12-16 22:20:33,175 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2021-12-16 22:20:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:20:33,175 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-12-16 22:20:33,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2842105263157895) internal successors, (217), 95 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-12-16 22:20:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-16 22:20:33,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:20:33,175 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:20:33,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-16 22:20:33,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-16 22:20:33,376 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:20:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:20:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash -294352235, now seen corresponding path program 57 times [2021-12-16 22:20:33,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:20:33,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064501034] [2021-12-16 22:20:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:20:33,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:20:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:34,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:20:34,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064501034] [2021-12-16 22:20:34,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064501034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:20:34,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707136644] [2021-12-16 22:20:34,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:20:34,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:20:34,345 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:20:34,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-16 22:20:47,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-16 22:20:47,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:20:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-16 22:20:47,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:20:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:48,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:20:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:48,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707136644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:20:48,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:20:48,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2021-12-16 22:20:48,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576060072] [2021-12-16 22:20:48,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:20:48,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-16 22:20:48,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:20:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-16 22:20:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=7325, Unknown=0, NotChecked=0, Total=9506 [2021-12-16 22:20:48,711 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:20:49,301 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2021-12-16 22:20:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-16 22:20:49,301 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-16 22:20:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:20:49,302 INFO L225 Difference]: With dead ends: 233 [2021-12-16 22:20:49,302 INFO L226 Difference]: Without dead ends: 136 [2021-12-16 22:20:49,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4145 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3762, Invalid=12750, Unknown=0, NotChecked=0, Total=16512 [2021-12-16 22:20:49,304 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 430 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:20:49,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 279 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:20:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-16 22:20:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2021-12-16 22:20:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-12-16 22:20:49,321 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 128 [2021-12-16 22:20:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:20:49,321 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-12-16 22:20:49,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-12-16 22:20:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 22:20:49,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:20:49,321 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:20:49,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-16 22:20:49,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-16 22:20:49,522 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:20:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:20:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1642228683, now seen corresponding path program 58 times [2021-12-16 22:20:49,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:20:49,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986071670] [2021-12-16 22:20:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:20:49,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:20:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:51,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:20:51,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986071670] [2021-12-16 22:20:51,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986071670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:20:51,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681161249] [2021-12-16 22:20:51,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:20:51,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:51,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:20:51,213 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:20:51,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-16 22:20:51,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:20:51,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:20:51,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-16 22:20:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:20:51,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:20:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:53,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:20:53,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:20:53,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:20:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:53,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681161249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:20:53,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:20:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 98 [2021-12-16 22:20:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281598304] [2021-12-16 22:20:53,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:20:53,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-16 22:20:53,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:20:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-16 22:20:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=9250, Unknown=0, NotChecked=0, Total=9506 [2021-12-16 22:20:53,856 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 98 states, 98 states have (on average 2.2857142857142856) internal successors, (224), 98 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:20:57,131 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2021-12-16 22:20:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-16 22:20:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2857142857142856) internal successors, (224), 98 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-16 22:20:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:20:57,132 INFO L225 Difference]: With dead ends: 137 [2021-12-16 22:20:57,132 INFO L226 Difference]: Without dead ends: 135 [2021-12-16 22:20:57,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 219 SyntacticMatches, 7 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=493, Invalid=16799, Unknown=0, NotChecked=0, Total=17292 [2021-12-16 22:20:57,133 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 2555 mSDsCounter, 0 mSdLazyCounter, 7679 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 7807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 7679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:20:57,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2592 Invalid, 7807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 7679 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 22:20:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-16 22:20:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-12-16 22:20:57,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-12-16 22:20:57,145 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 129 [2021-12-16 22:20:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:20:57,145 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-12-16 22:20:57,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2857142857142856) internal successors, (224), 98 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:20:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-12-16 22:20:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-16 22:20:57,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:20:57,146 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:20:57,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-16 22:20:57,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:57,346 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:20:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:20:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash -332980014, now seen corresponding path program 59 times [2021-12-16 22:20:57,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:20:57,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748053241] [2021-12-16 22:20:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:20:57,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:20:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:20:58,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:20:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748053241] [2021-12-16 22:20:58,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748053241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:20:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232261972] [2021-12-16 22:20:58,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:20:58,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:20:58,382 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:20:58,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-16 22:21:01,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-12-16 22:21:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:21:01,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-16 22:21:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:21:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:02,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:21:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:03,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232261972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:21:03,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:21:03,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2021-12-16 22:21:03,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945522920] [2021-12-16 22:21:03,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:21:03,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-16 22:21:03,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:21:03,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-16 22:21:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2315, Invalid=7785, Unknown=0, NotChecked=0, Total=10100 [2021-12-16 22:21:03,149 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:21:03,793 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2021-12-16 22:21:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-16 22:21:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-16 22:21:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:21:03,794 INFO L225 Difference]: With dead ends: 240 [2021-12-16 22:21:03,795 INFO L226 Difference]: Without dead ends: 140 [2021-12-16 22:21:03,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4407 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3995, Invalid=13561, Unknown=0, NotChecked=0, Total=17556 [2021-12-16 22:21:03,796 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 564 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:21:03,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 277 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:21:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-16 22:21:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-12-16 22:21:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-12-16 22:21:03,809 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 132 [2021-12-16 22:21:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:21:03,809 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-12-16 22:21:03,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-12-16 22:21:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-16 22:21:03,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:21:03,809 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:21:03,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-16 22:21:04,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:21:04,010 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:21:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:21:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1186297608, now seen corresponding path program 60 times [2021-12-16 22:21:04,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:21:04,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209071545] [2021-12-16 22:21:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:21:04,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:21:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:05,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:21:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209071545] [2021-12-16 22:21:05,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209071545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:21:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688084674] [2021-12-16 22:21:05,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:21:05,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:21:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:21:05,773 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:21:05,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-16 22:21:20,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-12-16 22:21:20,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:21:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-16 22:21:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:21:20,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:21:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:21:22,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:21:22,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:21:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:22,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688084674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:21:22,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:21:22,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 101 [2021-12-16 22:21:22,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980381747] [2021-12-16 22:21:22,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:21:22,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-16 22:21:22,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:21:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-16 22:21:22,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=9836, Unknown=0, NotChecked=0, Total=10100 [2021-12-16 22:21:22,727 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 101 states, 101 states have (on average 2.287128712871287) internal successors, (231), 101 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:21:26,296 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2021-12-16 22:21:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-16 22:21:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.287128712871287) internal successors, (231), 101 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-16 22:21:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:21:26,297 INFO L225 Difference]: With dead ends: 141 [2021-12-16 22:21:26,297 INFO L226 Difference]: Without dead ends: 139 [2021-12-16 22:21:26,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 227 SyntacticMatches, 6 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2243 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=508, Invalid=17852, Unknown=0, NotChecked=0, Total=18360 [2021-12-16 22:21:26,298 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 2791 mSDsCounter, 0 mSdLazyCounter, 8458 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 8591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 8458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:21:26,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 2829 Invalid, 8591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 8458 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-16 22:21:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-16 22:21:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-12-16 22:21:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-12-16 22:21:26,313 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 133 [2021-12-16 22:21:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:21:26,313 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-12-16 22:21:26,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.287128712871287) internal successors, (231), 101 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-12-16 22:21:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-16 22:21:26,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:21:26,314 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:21:26,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-16 22:21:26,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:21:26,528 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:21:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:21:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2005921909, now seen corresponding path program 61 times [2021-12-16 22:21:26,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:21:26,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078295903] [2021-12-16 22:21:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:21:26,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:21:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:27,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:21:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078295903] [2021-12-16 22:21:27,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078295903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:21:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842891922] [2021-12-16 22:21:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:21:27,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:21:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:21:27,621 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:21:27,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-16 22:21:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-16 22:21:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:21:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:29,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:21:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:29,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842891922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:21:29,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:21:29,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 104 [2021-12-16 22:21:29,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181534339] [2021-12-16 22:21:29,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:21:29,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-16 22:21:29,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:21:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-16 22:21:29,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=8259, Unknown=0, NotChecked=0, Total=10712 [2021-12-16 22:21:29,652 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 104 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:21:30,288 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2021-12-16 22:21:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-16 22:21:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 104 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-16 22:21:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:21:30,289 INFO L225 Difference]: With dead ends: 247 [2021-12-16 22:21:30,289 INFO L226 Difference]: Without dead ends: 144 [2021-12-16 22:21:30,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4235, Invalid=14397, Unknown=0, NotChecked=0, Total=18632 [2021-12-16 22:21:30,296 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 462 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:21:30,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 317 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:21:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-16 22:21:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2021-12-16 22:21:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-12-16 22:21:30,312 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2021-12-16 22:21:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:21:30,312 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-12-16 22:21:30,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 104 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-12-16 22:21:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-16 22:21:30,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:21:30,313 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:21:30,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-16 22:21:30,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:21:30,526 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:21:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:21:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1711522901, now seen corresponding path program 62 times [2021-12-16 22:21:30,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:21:30,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003495633] [2021-12-16 22:21:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:21:30,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:21:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:32,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:21:32,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003495633] [2021-12-16 22:21:32,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003495633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:21:32,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857378146] [2021-12-16 22:21:32,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:21:32,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:21:32,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:21:32,595 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:21:32,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-16 22:21:32,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:21:32,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:21:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-16 22:21:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:21:34,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:21:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:37,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:21:40,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:21:40,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:21:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:40,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857378146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:21:40,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:21:40,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 171 [2021-12-16 22:21:40,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421027274] [2021-12-16 22:21:40,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:21:40,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2021-12-16 22:21:40,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:21:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2021-12-16 22:21:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=28594, Unknown=0, NotChecked=0, Total=29070 [2021-12-16 22:21:40,235 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 171 states, 171 states have (on average 2.1578947368421053) internal successors, (369), 171 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:49,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:21:49,034 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-12-16 22:21:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-16 22:21:49,034 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.1578947368421053) internal successors, (369), 171 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-12-16 22:21:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:21:49,035 INFO L225 Difference]: With dead ends: 145 [2021-12-16 22:21:49,035 INFO L226 Difference]: Without dead ends: 143 [2021-12-16 22:21:49,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7033 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1045, Invalid=55361, Unknown=0, NotChecked=0, Total=56406 [2021-12-16 22:21:49,037 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 82 mSDsluCounter, 4059 mSDsCounter, 0 mSdLazyCounter, 12528 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 4098 SdHoareTripleChecker+Invalid, 12732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 12528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:21:49,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 4098 Invalid, 12732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 12528 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-16 22:21:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-16 22:21:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-12-16 22:21:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-12-16 22:21:49,051 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2021-12-16 22:21:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:21:49,051 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-12-16 22:21:49,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 2.1578947368421053) internal successors, (369), 171 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:21:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-12-16 22:21:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-16 22:21:49,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:21:49,052 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:21:49,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-16 22:21:49,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-16 22:21:49,253 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:21:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:21:49,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1877787890, now seen corresponding path program 63 times [2021-12-16 22:21:49,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:21:49,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874959891] [2021-12-16 22:21:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:21:49,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:21:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:21:50,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:21:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874959891] [2021-12-16 22:21:50,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874959891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:21:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920820401] [2021-12-16 22:21:50,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:21:50,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:21:50,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:21:50,385 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:21:50,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-16 22:22:59,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-12-16 22:22:59,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:22:59,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-16 22:22:59,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:23:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:01,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:23:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920820401] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:23:01,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:23:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2021-12-16 22:23:01,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701429157] [2021-12-16 22:23:01,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:23:01,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-16 22:23:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:23:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-16 22:23:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2595, Invalid=8747, Unknown=0, NotChecked=0, Total=11342 [2021-12-16 22:23:01,765 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 107 states, 107 states have (on average 2.308411214953271) internal successors, (247), 107 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:23:02,460 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2021-12-16 22:23:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-16 22:23:02,460 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.308411214953271) internal successors, (247), 107 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-16 22:23:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:23:02,461 INFO L225 Difference]: With dead ends: 254 [2021-12-16 22:23:02,461 INFO L226 Difference]: Without dead ends: 148 [2021-12-16 22:23:02,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4955 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4482, Invalid=15258, Unknown=0, NotChecked=0, Total=19740 [2021-12-16 22:23:02,462 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 512 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:23:02,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 337 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:23:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-16 22:23:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2021-12-16 22:23:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2021-12-16 22:23:02,476 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 140 [2021-12-16 22:23:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:23:02,476 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2021-12-16 22:23:02,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.308411214953271) internal successors, (247), 107 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2021-12-16 22:23:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-16 22:23:02,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:23:02,477 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:23:02,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-16 22:23:02,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:23:02,677 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:23:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:23:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1607170776, now seen corresponding path program 64 times [2021-12-16 22:23:02,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:23:02,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747020284] [2021-12-16 22:23:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:23:02,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:23:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:23:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:04,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:23:04,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747020284] [2021-12-16 22:23:04,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747020284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:23:04,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46010065] [2021-12-16 22:23:04,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:23:04,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:23:04,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:23:04,637 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:23:04,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-16 22:23:04,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:23:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:23:04,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-16 22:23:04,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:23:05,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:23:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:07,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:23:07,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:23:07,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:23:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:07,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46010065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:23:07,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:23:07,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 107 [2021-12-16 22:23:07,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397998656] [2021-12-16 22:23:07,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:23:07,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-16 22:23:07,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:23:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-16 22:23:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=11062, Unknown=0, NotChecked=0, Total=11342 [2021-12-16 22:23:07,699 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 107 states, 107 states have (on average 2.289719626168224) internal successors, (245), 107 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:23:11,447 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2021-12-16 22:23:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-16 22:23:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.289719626168224) internal successors, (245), 107 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-16 22:23:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:23:11,448 INFO L225 Difference]: With dead ends: 149 [2021-12-16 22:23:11,448 INFO L226 Difference]: Without dead ends: 147 [2021-12-16 22:23:11,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2519 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=538, Invalid=20054, Unknown=0, NotChecked=0, Total=20592 [2021-12-16 22:23:11,449 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 45 mSDsluCounter, 3067 mSDsCounter, 0 mSdLazyCounter, 8956 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 9097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 8956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:23:11,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3107 Invalid, 9097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 8956 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-16 22:23:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-16 22:23:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2021-12-16 22:23:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-12-16 22:23:11,464 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2021-12-16 22:23:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:23:11,464 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-12-16 22:23:11,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.289719626168224) internal successors, (245), 107 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-12-16 22:23:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-16 22:23:11,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:23:11,465 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:23:11,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-12-16 22:23:11,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-16 22:23:11,686 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:23:11,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:23:11,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1075621461, now seen corresponding path program 65 times [2021-12-16 22:23:11,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:23:11,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918982652] [2021-12-16 22:23:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:23:11,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:23:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:23:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:12,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:23:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918982652] [2021-12-16 22:23:12,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918982652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:23:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929874372] [2021-12-16 22:23:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:23:12,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:23:12,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:23:12,869 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:23:12,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-16 22:23:14,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-12-16 22:23:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:23:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-16 22:23:14,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:23:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:16,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:23:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:16,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929874372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:23:16,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:23:16,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2021-12-16 22:23:16,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236538455] [2021-12-16 22:23:16,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:23:16,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-16 22:23:16,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:23:16,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-16 22:23:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2741, Invalid=9249, Unknown=0, NotChecked=0, Total=11990 [2021-12-16 22:23:16,728 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 110 states, 110 states have (on average 2.309090909090909) internal successors, (254), 110 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:23:17,425 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2021-12-16 22:23:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-16 22:23:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.309090909090909) internal successors, (254), 110 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-12-16 22:23:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:23:17,426 INFO L225 Difference]: With dead ends: 261 [2021-12-16 22:23:17,426 INFO L226 Difference]: Without dead ends: 152 [2021-12-16 22:23:17,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5241 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4736, Invalid=16144, Unknown=0, NotChecked=0, Total=20880 [2021-12-16 22:23:17,427 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 570 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:23:17,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 339 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:23:17,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-16 22:23:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2021-12-16 22:23:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-12-16 22:23:17,441 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 144 [2021-12-16 22:23:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:23:17,442 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-12-16 22:23:17,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.309090909090909) internal successors, (254), 110 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-12-16 22:23:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-16 22:23:17,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:23:17,443 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:23:17,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-16 22:23:17,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-16 22:23:17,647 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:23:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:23:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1988271221, now seen corresponding path program 66 times [2021-12-16 22:23:17,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:23:17,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877780140] [2021-12-16 22:23:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:23:17,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:23:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:23:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:19,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:23:19,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877780140] [2021-12-16 22:23:19,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877780140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:23:19,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100467127] [2021-12-16 22:23:19,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:23:19,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:23:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:23:19,703 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:23:19,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-16 22:23:42,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-12-16 22:23:42,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:23:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 163 conjunts are in the unsatisfiable core [2021-12-16 22:23:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:23:42,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:23:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:45,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:23:48,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2021-12-16 22:23:48,647 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-16 22:23:48,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 88 [2021-12-16 22:23:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:48,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100467127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:23:48,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:23:48,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 78, 78] total 143 [2021-12-16 22:23:48,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130045753] [2021-12-16 22:23:48,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:23:48,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-12-16 22:23:48,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:23:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-12-16 22:23:48,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=19830, Unknown=0, NotChecked=0, Total=20306 [2021-12-16 22:23:48,803 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 143 states, 143 states have (on average 2.2937062937062938) internal successors, (328), 143 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:23:54,535 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2021-12-16 22:23:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-16 22:23:54,535 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.2937062937062938) internal successors, (328), 143 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-16 22:23:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:23:54,536 INFO L225 Difference]: With dead ends: 153 [2021-12-16 22:23:54,536 INFO L226 Difference]: Without dead ends: 151 [2021-12-16 22:23:54,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 216 SyntacticMatches, 5 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5009 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=869, Invalid=33541, Unknown=0, NotChecked=0, Total=34410 [2021-12-16 22:23:54,537 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 3392 mSDsCounter, 0 mSdLazyCounter, 11205 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3431 SdHoareTripleChecker+Invalid, 11356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 11205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:23:54,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 3431 Invalid, 11356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 11205 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-16 22:23:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-16 22:23:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2021-12-16 22:23:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-12-16 22:23:54,553 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 145 [2021-12-16 22:23:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:23:54,553 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-12-16 22:23:54,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.2937062937062938) internal successors, (328), 143 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-12-16 22:23:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-16 22:23:54,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:23:54,554 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:23:54,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-16 22:23:54,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-16 22:23:54,759 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:23:54,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:23:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash -689172206, now seen corresponding path program 67 times [2021-12-16 22:23:54,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:23:54,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853088062] [2021-12-16 22:23:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:23:54,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:23:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:23:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:56,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:23:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853088062] [2021-12-16 22:23:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853088062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:23:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117726294] [2021-12-16 22:23:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:23:56,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:23:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:23:56,022 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:23:56,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-16 22:23:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:23:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-16 22:23:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:23:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:58,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:23:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:23:58,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117726294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:23:58,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:23:58,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2021-12-16 22:23:58,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182068674] [2021-12-16 22:23:58,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:23:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-12-16 22:23:58,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:23:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-12-16 22:23:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2891, Invalid=9765, Unknown=0, NotChecked=0, Total=12656 [2021-12-16 22:23:58,356 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 113 states, 113 states have (on average 2.309734513274336) internal successors, (261), 113 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:23:59,107 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2021-12-16 22:23:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-16 22:23:59,108 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.309734513274336) internal successors, (261), 113 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-12-16 22:23:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:23:59,108 INFO L225 Difference]: With dead ends: 268 [2021-12-16 22:23:59,108 INFO L226 Difference]: Without dead ends: 156 [2021-12-16 22:23:59,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5535 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4997, Invalid=17055, Unknown=0, NotChecked=0, Total=22052 [2021-12-16 22:23:59,110 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 444 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:23:59,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 366 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:23:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-16 22:23:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2021-12-16 22:23:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2021-12-16 22:23:59,126 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 148 [2021-12-16 22:23:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:23:59,126 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2021-12-16 22:23:59,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.309734513274336) internal successors, (261), 113 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:23:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2021-12-16 22:23:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-16 22:23:59,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:23:59,127 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:23:59,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-12-16 22:23:59,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-16 22:23:59,345 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:23:59,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:23:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1776499528, now seen corresponding path program 68 times [2021-12-16 22:23:59,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:23:59,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359346984] [2021-12-16 22:23:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:23:59,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:23:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:24:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:24:01,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:24:01,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359346984] [2021-12-16 22:24:01,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359346984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:24:01,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382947884] [2021-12-16 22:24:01,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:24:01,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:24:01,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:24:01,526 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:24:01,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-16 22:24:01,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:24:01,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:24:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-16 22:24:01,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:24:01,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:24:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:24:04,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:24:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:24:04,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:24:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:24:04,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382947884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:24:04,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:24:04,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 113 [2021-12-16 22:24:04,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238779551] [2021-12-16 22:24:04,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:24:04,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-12-16 22:24:04,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:24:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-12-16 22:24:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=12360, Unknown=0, NotChecked=0, Total=12656 [2021-12-16 22:24:04,838 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 113 states, 113 states have (on average 2.2920353982300883) internal successors, (259), 113 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:24:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:24:09,025 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2021-12-16 22:24:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-16 22:24:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.2920353982300883) internal successors, (259), 113 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-12-16 22:24:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:24:09,026 INFO L225 Difference]: With dead ends: 157 [2021-12-16 22:24:09,026 INFO L226 Difference]: Without dead ends: 155 [2021-12-16 22:24:09,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=568, Invalid=22384, Unknown=0, NotChecked=0, Total=22952 [2021-12-16 22:24:09,028 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 45 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 9983 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3296 SdHoareTripleChecker+Invalid, 10130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 9983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:24:09,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3296 Invalid, 10130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 9983 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-16 22:24:09,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-16 22:24:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2021-12-16 22:24:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:24:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-12-16 22:24:09,044 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 149 [2021-12-16 22:24:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:24:09,044 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-12-16 22:24:09,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.2920353982300883) internal successors, (259), 113 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:24:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-12-16 22:24:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-16 22:24:09,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:24:09,045 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:24:09,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-12-16 22:24:09,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:24:09,255 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:24:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:24:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1115210805, now seen corresponding path program 69 times [2021-12-16 22:24:09,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:24:09,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636105259] [2021-12-16 22:24:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:24:09,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:24:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:24:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:24:10,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:24:10,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636105259] [2021-12-16 22:24:10,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636105259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:24:10,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269021117] [2021-12-16 22:24:10,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:24:10,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:24:10,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:24:10,568 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:24:10,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-16 22:24:52,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2021-12-16 22:24:52,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:24:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-16 22:24:52,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:24:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:24:54,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:24:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:24:54,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269021117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:24:54,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:24:54,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2021-12-16 22:24:54,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585121118] [2021-12-16 22:24:54,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:24:54,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-16 22:24:54,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:24:54,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-16 22:24:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3045, Invalid=10295, Unknown=0, NotChecked=0, Total=13340 [2021-12-16 22:24:54,255 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 116 states, 116 states have (on average 2.310344827586207) internal successors, (268), 116 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:24:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:24:55,007 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2021-12-16 22:24:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-16 22:24:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.310344827586207) internal successors, (268), 116 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-12-16 22:24:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:24:55,008 INFO L225 Difference]: With dead ends: 275 [2021-12-16 22:24:55,008 INFO L226 Difference]: Without dead ends: 160 [2021-12-16 22:24:55,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5837 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5265, Invalid=17991, Unknown=0, NotChecked=0, Total=23256 [2021-12-16 22:24:55,010 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 498 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:24:55,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 337 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:24:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-16 22:24:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2021-12-16 22:24:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:24:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2021-12-16 22:24:55,030 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 152 [2021-12-16 22:24:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:24:55,030 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2021-12-16 22:24:55,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.310344827586207) internal successors, (268), 116 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:24:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2021-12-16 22:24:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-16 22:24:55,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:24:55,031 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:24:55,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-16 22:24:55,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:24:55,232 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:24:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:24:55,232 INFO L85 PathProgramCache]: Analyzing trace with hash -725359765, now seen corresponding path program 70 times [2021-12-16 22:24:55,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:24:55,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872033909] [2021-12-16 22:24:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:24:55,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:24:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:24:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:24:57,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:24:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872033909] [2021-12-16 22:24:57,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872033909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:24:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64594314] [2021-12-16 22:24:57,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:24:57,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:24:57,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:24:57,732 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:24:57,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-16 22:24:58,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:24:58,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:24:58,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-16 22:24:58,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:25:00,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:25:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:25:03,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:25:07,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:25:07,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:25:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:25:07,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64594314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:25:07,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:25:07,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 191 [2021-12-16 22:25:07,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83591208] [2021-12-16 22:25:07,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:25:07,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2021-12-16 22:25:07,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:25:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2021-12-16 22:25:07,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=35758, Unknown=0, NotChecked=0, Total=36290 [2021-12-16 22:25:07,091 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 191 states, 191 states have (on average 2.162303664921466) internal successors, (413), 191 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:25:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:25:18,077 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2021-12-16 22:25:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-16 22:25:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 2.162303664921466) internal successors, (413), 191 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-12-16 22:25:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:25:18,078 INFO L225 Difference]: With dead ends: 161 [2021-12-16 22:25:18,078 INFO L226 Difference]: Without dead ends: 159 [2021-12-16 22:25:18,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8773 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1169, Invalid=69321, Unknown=0, NotChecked=0, Total=70490 [2021-12-16 22:25:18,081 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 48 mSDsluCounter, 5244 mSDsCounter, 0 mSdLazyCounter, 15975 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 5287 SdHoareTripleChecker+Invalid, 16128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 15975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:25:18,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 5287 Invalid, 16128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 15975 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-16 22:25:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-16 22:25:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-12-16 22:25:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:25:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-12-16 22:25:18,097 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 153 [2021-12-16 22:25:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:25:18,097 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-12-16 22:25:18,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 2.162303664921466) internal successors, (413), 191 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:25:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-12-16 22:25:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-16 22:25:18,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:25:18,098 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:25:18,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-16 22:25:18,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:25:18,303 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:25:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:25:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1207499470, now seen corresponding path program 71 times [2021-12-16 22:25:18,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:25:18,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105408885] [2021-12-16 22:25:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:25:18,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:25:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:25:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1963 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:25:19,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:25:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105408885] [2021-12-16 22:25:19,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105408885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:25:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615559990] [2021-12-16 22:25:19,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:25:19,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:25:19,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:25:19,708 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:25:19,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-16 22:25:21,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2021-12-16 22:25:21,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:25:21,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-16 22:25:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:25:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:25:23,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:25:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:25:23,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615559990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:25:23,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:25:23,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 119 [2021-12-16 22:25:23,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64647400] [2021-12-16 22:25:23,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:25:23,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-16 22:25:23,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:25:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-16 22:25:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3203, Invalid=10839, Unknown=0, NotChecked=0, Total=14042 [2021-12-16 22:25:23,976 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 119 states, 119 states have (on average 2.310924369747899) internal successors, (275), 119 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:25:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:25:24,760 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2021-12-16 22:25:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-16 22:25:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.310924369747899) internal successors, (275), 119 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-12-16 22:25:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:25:24,761 INFO L225 Difference]: With dead ends: 282 [2021-12-16 22:25:24,761 INFO L226 Difference]: Without dead ends: 164 [2021-12-16 22:25:24,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6147 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5540, Invalid=18952, Unknown=0, NotChecked=0, Total=24492 [2021-12-16 22:25:24,763 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 516 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:25:24,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 364 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:25:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-16 22:25:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2021-12-16 22:25:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:25:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2021-12-16 22:25:24,780 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 156 [2021-12-16 22:25:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:25:24,780 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2021-12-16 22:25:24,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.310924369747899) internal successors, (275), 119 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:25:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2021-12-16 22:25:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-16 22:25:24,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:25:24,781 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:25:24,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-16 22:25:24,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-12-16 22:25:24,995 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:25:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:25:24,996 INFO L85 PathProgramCache]: Analyzing trace with hash -459040408, now seen corresponding path program 72 times [2021-12-16 22:25:24,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:25:24,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326052130] [2021-12-16 22:25:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:25:24,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:25:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:25:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:25:27,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:25:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326052130] [2021-12-16 22:25:27,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326052130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:25:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649203381] [2021-12-16 22:25:27,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:25:27,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:25:27,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:25:27,373 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:25:27,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-16 22:26:58,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-12-16 22:26:58,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:26:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 161 conjunts are in the unsatisfiable core [2021-12-16 22:26:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:26:58,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:27:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:01,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:27:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:27:01,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:27:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:01,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649203381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:27:01,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:27:01,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 119 [2021-12-16 22:27:01,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572094329] [2021-12-16 22:27:01,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:27:01,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-16 22:27:01,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:27:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-16 22:27:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=13730, Unknown=0, NotChecked=0, Total=14042 [2021-12-16 22:27:01,833 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 119 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:27:06,862 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2021-12-16 22:27:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-16 22:27:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-12-16 22:27:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:27:06,863 INFO L225 Difference]: With dead ends: 165 [2021-12-16 22:27:06,863 INFO L226 Difference]: Without dead ends: 163 [2021-12-16 22:27:06,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 269 SyntacticMatches, 6 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=598, Invalid=24842, Unknown=0, NotChecked=0, Total=25440 [2021-12-16 22:27:06,865 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 47 mSDsluCounter, 4080 mSDsCounter, 0 mSdLazyCounter, 12469 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 4124 SdHoareTripleChecker+Invalid, 12624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 12469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:27:06,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 4124 Invalid, 12624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 12469 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-16 22:27:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-16 22:27:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2021-12-16 22:27:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-12-16 22:27:06,888 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 157 [2021-12-16 22:27:06,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:27:06,888 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-12-16 22:27:06,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-12-16 22:27:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 22:27:06,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:27:06,889 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:27:06,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-16 22:27:07,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:27:07,111 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:27:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:27:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash -92130795, now seen corresponding path program 73 times [2021-12-16 22:27:07,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:27:07,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779255736] [2021-12-16 22:27:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:27:07,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:27:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:27:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2073 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:08,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:27:08,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779255736] [2021-12-16 22:27:08,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779255736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:27:08,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019455372] [2021-12-16 22:27:08,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:27:08,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:27:08,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:27:08,535 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:27:08,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-16 22:27:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:27:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-16 22:27:08,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:27:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:10,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:27:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:11,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019455372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:27:11,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:27:11,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 122 [2021-12-16 22:27:11,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674281779] [2021-12-16 22:27:11,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:27:11,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-16 22:27:11,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:27:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-16 22:27:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=11397, Unknown=0, NotChecked=0, Total=14762 [2021-12-16 22:27:11,087 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 122 states, 122 states have (on average 2.3114754098360657) internal successors, (282), 122 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:27:11,880 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2021-12-16 22:27:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-16 22:27:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.3114754098360657) internal successors, (282), 122 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-12-16 22:27:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:27:11,881 INFO L225 Difference]: With dead ends: 289 [2021-12-16 22:27:11,881 INFO L226 Difference]: Without dead ends: 168 [2021-12-16 22:27:11,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6465 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5822, Invalid=19938, Unknown=0, NotChecked=0, Total=25760 [2021-12-16 22:27:11,883 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 678 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:27:11,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 343 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:27:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-16 22:27:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2021-12-16 22:27:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-12-16 22:27:11,911 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 160 [2021-12-16 22:27:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:27:11,911 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-12-16 22:27:11,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.3114754098360657) internal successors, (282), 122 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-12-16 22:27:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 22:27:11,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:27:11,912 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:27:11,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-16 22:27:12,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:27:12,126 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:27:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:27:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1582449845, now seen corresponding path program 74 times [2021-12-16 22:27:12,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:27:12,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551640403] [2021-12-16 22:27:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:27:12,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:27:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:27:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:14,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:27:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551640403] [2021-12-16 22:27:14,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551640403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:27:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304167865] [2021-12-16 22:27:14,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:27:14,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:27:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:27:14,588 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:27:14,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-16 22:27:14,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:27:14,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:27:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 165 conjunts are in the unsatisfiable core [2021-12-16 22:27:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:27:15,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 22:27:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:17,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:27:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 22:27:18,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 22:27:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:18,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304167865] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:27:18,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:27:18,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 122 [2021-12-16 22:27:18,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959014121] [2021-12-16 22:27:18,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:27:18,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-16 22:27:18,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:27:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-16 22:27:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=14442, Unknown=0, NotChecked=0, Total=14762 [2021-12-16 22:27:18,396 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 122 states, 122 states have (on average 2.2950819672131146) internal successors, (280), 122 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:27:23,201 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2021-12-16 22:27:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-12-16 22:27:23,201 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.2950819672131146) internal successors, (280), 122 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-16 22:27:23,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:27:23,202 INFO L225 Difference]: With dead ends: 169 [2021-12-16 22:27:23,202 INFO L226 Difference]: Without dead ends: 167 [2021-12-16 22:27:23,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 275 SyntacticMatches, 7 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=613, Invalid=26119, Unknown=0, NotChecked=0, Total=26732 [2021-12-16 22:27:23,203 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 49 mSDsluCounter, 3835 mSDsCounter, 0 mSdLazyCounter, 11429 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3880 SdHoareTripleChecker+Invalid, 11589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 11429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:27:23,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 3880 Invalid, 11589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 11429 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-16 22:27:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-16 22:27:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-12-16 22:27:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-12-16 22:27:23,243 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 161 [2021-12-16 22:27:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:27:23,243 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-12-16 22:27:23,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.2950819672131146) internal successors, (280), 122 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:27:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-12-16 22:27:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-16 22:27:23,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:27:23,244 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:27:23,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-16 22:27:23,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-16 22:27:23,463 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:27:23,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:27:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1197498030, now seen corresponding path program 75 times [2021-12-16 22:27:23,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:27:23,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176226288] [2021-12-16 22:27:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:27:23,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:27:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:27:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2186 proven. 895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:27:24,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:27:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176226288] [2021-12-16 22:27:24,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176226288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:27:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151226711] [2021-12-16 22:27:24,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:27:24,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:27:24,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:27:24,994 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:27:24,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process Killed by 15