./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/count_by_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/loop-new/count_by_2.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 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 03:59:05,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 03:59:05,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 03:59:06,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 03:59:06,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 03:59:06,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 03:59:06,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 03:59:06,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 03:59:06,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 03:59:06,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 03:59:06,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 03:59:06,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 03:59:06,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 03:59:06,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 03:59:06,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 03:59:06,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 03:59:06,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 03:59:06,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 03:59:06,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 03:59:06,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 03:59:06,040 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 03:59:06,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 03:59:06,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 03:59:06,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 03:59:06,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 03:59:06,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 03:59:06,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 03:59:06,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 03:59:06,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 03:59:06,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 03:59:06,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 03:59:06,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 03:59:06,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 03:59:06,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 03:59:06,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 03:59:06,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 03:59:06,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 03:59:06,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 03:59:06,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 03:59:06,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 03:59:06,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 03:59:06,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 03:59:06,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 03:59:06,083 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 03:59:06,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 03:59:06,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 03:59:06,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 03:59:06,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 03:59:06,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 03:59:06,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 03:59:06,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 03:59:06,085 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 03:59:06,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 03:59:06,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 03:59:06,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 03:59:06,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 03:59:06,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 03:59:06,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 03:59:06,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 03:59:06,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 03:59:06,087 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 03:59:06,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 03:59:06,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 03:59:06,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 03:59:06,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 03:59:06,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 03:59:06,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 03:59:06,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 03:59:06,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 03:59:06,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 03:59:06,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 03:59:06,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 03:59:06,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 03:59:06,089 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 03:59:06,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 03:59:06,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 03:59:06,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2022-07-12 03:59:06,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 03:59:06,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 03:59:06,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 03:59:06,281 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 03:59:06,282 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 03:59:06,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_2.i [2022-07-12 03:59:06,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14728480b/42caef18d0434b429d9370633a3ec9a2/FLAG7fb42138e [2022-07-12 03:59:06,742 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 03:59:06,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i [2022-07-12 03:59:06,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14728480b/42caef18d0434b429d9370633a3ec9a2/FLAG7fb42138e [2022-07-12 03:59:06,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14728480b/42caef18d0434b429d9370633a3ec9a2 [2022-07-12 03:59:06,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 03:59:06,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 03:59:06,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 03:59:06,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 03:59:06,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 03:59:06,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e87bc8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06, skipping insertion in model container [2022-07-12 03:59:06,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 03:59:06,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 03:59:06,903 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/loop-new/count_by_2.i[891,904] [2022-07-12 03:59:06,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 03:59:06,920 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 03:59:06,929 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/loop-new/count_by_2.i[891,904] [2022-07-12 03:59:06,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 03:59:06,939 INFO L208 MainTranslator]: Completed translation [2022-07-12 03:59:06,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06 WrapperNode [2022-07-12 03:59:06,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 03:59:06,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 03:59:06,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 03:59:06,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 03:59:06,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,960 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2022-07-12 03:59:06,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 03:59:06,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 03:59:06,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 03:59:06,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 03:59:06,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 03:59:06,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 03:59:06,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 03:59:06,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 03:59:06,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (1/1) ... [2022-07-12 03:59:06,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 03:59:06,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:06,999 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) [2022-07-12 03:59:07,000 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 [2022-07-12 03:59:07,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 03:59:07,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 03:59:07,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 03:59:07,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 03:59:07,060 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 03:59:07,061 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 03:59:07,126 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 03:59:07,130 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 03:59:07,130 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 03:59:07,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 03:59:07 BoogieIcfgContainer [2022-07-12 03:59:07,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 03:59:07,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 03:59:07,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 03:59:07,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 03:59:07,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 03:59:06" (1/3) ... [2022-07-12 03:59:07,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b108549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 03:59:07, skipping insertion in model container [2022-07-12 03:59:07,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:59:06" (2/3) ... [2022-07-12 03:59:07,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b108549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 03:59:07, skipping insertion in model container [2022-07-12 03:59:07,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 03:59:07" (3/3) ... [2022-07-12 03:59:07,142 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2022-07-12 03:59:07,155 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 03:59:07,156 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 03:59:07,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 03:59:07,216 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77413d18, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@18d14ade [2022-07-12 03:59:07,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 03:59:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) [2022-07-12 03:59:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 03:59:07,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:07,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 03:59:07,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:07,228 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2022-07-12 03:59:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:07,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647729823] [2022-07-12 03:59:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:07,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:07,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647729823] [2022-07-12 03:59:07,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647729823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:59:07,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:59:07,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 03:59:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689313777] [2022-07-12 03:59:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:59:07,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 03:59:07,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:07,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 03:59:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 03:59:07,400 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:07,427 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-07-12 03:59:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 03:59:07,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-12 03:59:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:07,435 INFO L225 Difference]: With dead ends: 22 [2022-07-12 03:59:07,435 INFO L226 Difference]: Without dead ends: 10 [2022-07-12 03:59:07,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 03:59:07,441 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:07,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:59:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-12 03:59:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-07-12 03:59:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-07-12 03:59:07,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-07-12 03:59:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:07,469 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-07-12 03:59:07,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-07-12 03:59:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 03:59:07,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:07,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:07,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 03:59:07,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:07,481 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2022-07-12 03:59:07,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:07,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577166599] [2022-07-12 03:59:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:07,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:07,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:07,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577166599] [2022-07-12 03:59:07,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577166599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:07,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924437425] [2022-07-12 03:59:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:07,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:07,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:07,525 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) [2022-07-12 03:59:07,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 03:59:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:07,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 03:59:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:07,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:07,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924437425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:07,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:07,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-12 03:59:07,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415555653] [2022-07-12 03:59:07,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:07,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:59:07,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:59:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:59:07,652 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-07-12 03:59:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:07,671 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-07-12 03:59:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 03:59:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) Word has length 8 [2022-07-12 03:59:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:07,672 INFO L225 Difference]: With dead ends: 19 [2022-07-12 03:59:07,672 INFO L226 Difference]: Without dead ends: 15 [2022-07-12 03:59:07,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:59:07,674 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:07,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:59:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-12 03:59:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-12 03:59:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2022-07-12 03:59:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-07-12 03:59:07,677 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-07-12 03:59:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:07,678 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-07-12 03:59:07,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-07-12 03:59:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-07-12 03:59:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 03:59:07,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:07,679 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:07,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:07,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:07,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:07,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 2 times [2022-07-12 03:59:07,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:07,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362881557] [2022-07-12 03:59:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:07,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:07,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:07,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362881557] [2022-07-12 03:59:07,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362881557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:07,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233402301] [2022-07-12 03:59:07,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:07,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:07,974 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) [2022-07-12 03:59:07,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 03:59:08,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 03:59:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:08,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:08,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233402301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:08,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:08,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-12 03:59:08,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695716368] [2022-07-12 03:59:08,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:08,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 03:59:08,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:08,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 03:59:08,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-12 03:59:08,138 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2022-07-12 03:59:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:08,181 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-07-12 03:59:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 03:59:08,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 14 [2022-07-12 03:59:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:08,182 INFO L225 Difference]: With dead ends: 31 [2022-07-12 03:59:08,182 INFO L226 Difference]: Without dead ends: 27 [2022-07-12 03:59:08,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-12 03:59:08,184 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:08,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:59:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-12 03:59:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-12 03:59:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 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) [2022-07-12 03:59:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-07-12 03:59:08,190 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-07-12 03:59:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:08,190 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-07-12 03:59:08,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2022-07-12 03:59:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-07-12 03:59:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 03:59:08,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:08,192 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:08,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:08,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-12 03:59:08,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 3 times [2022-07-12 03:59:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:08,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261967669] [2022-07-12 03:59:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:08,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:08,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:08,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261967669] [2022-07-12 03:59:08,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261967669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:08,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157965700] [2022-07-12 03:59:08,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:59:08,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:08,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:08,546 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) [2022-07-12 03:59:08,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 03:59:08,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 03:59:08,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:08,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 03:59:08,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:08,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:08,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157965700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:08,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:08,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-12 03:59:08,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733120268] [2022-07-12 03:59:08,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:08,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 03:59:08,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 03:59:08,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-12 03:59:08,852 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2022-07-12 03:59:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:08,925 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-07-12 03:59:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 03:59:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 26 [2022-07-12 03:59:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:08,927 INFO L225 Difference]: With dead ends: 55 [2022-07-12 03:59:08,927 INFO L226 Difference]: Without dead ends: 51 [2022-07-12 03:59:08,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-12 03:59:08,928 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:08,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-12 03:59:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-12 03:59:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 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) [2022-07-12 03:59:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-07-12 03:59:08,933 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-07-12 03:59:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:08,934 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-07-12 03:59:08,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2022-07-12 03:59:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-07-12 03:59:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 03:59:08,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:08,935 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:08,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:09,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:09,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 4 times [2022-07-12 03:59:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:09,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213908837] [2022-07-12 03:59:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:09,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:09,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213908837] [2022-07-12 03:59:09,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213908837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686281615] [2022-07-12 03:59:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:59:09,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:09,432 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) [2022-07-12 03:59:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 03:59:09,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:59:09,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:09,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:59:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:09,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:10,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686281615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:10,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:10,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-12 03:59:10,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76518870] [2022-07-12 03:59:10,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:10,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 03:59:10,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:10,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 03:59:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 03:59:10,216 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 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) [2022-07-12 03:59:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:10,358 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-07-12 03:59:10,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 03:59:10,359 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 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) Word has length 50 [2022-07-12 03:59:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:10,359 INFO L225 Difference]: With dead ends: 103 [2022-07-12 03:59:10,360 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 03:59:10,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 03:59:10,361 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:10,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 18 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 03:59:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-12 03:59:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 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) [2022-07-12 03:59:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-07-12 03:59:10,369 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-07-12 03:59:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:10,369 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-07-12 03:59:10,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 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) [2022-07-12 03:59:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-07-12 03:59:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-12 03:59:10,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:10,371 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:10,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:10,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:10,579 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 5 times [2022-07-12 03:59:10,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:10,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250262431] [2022-07-12 03:59:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:10,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:11,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:11,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250262431] [2022-07-12 03:59:11,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250262431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:11,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933313402] [2022-07-12 03:59:11,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:59:11,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:11,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:11,399 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) [2022-07-12 03:59:11,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 03:59:11,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-12 03:59:11,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:11,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 03:59:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:11,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:13,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933313402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:13,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:13,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-12 03:59:13,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629659580] [2022-07-12 03:59:13,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:13,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-12 03:59:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-12 03:59:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-12 03:59:13,753 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:13,993 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-07-12 03:59:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-12 03:59:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 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 98 [2022-07-12 03:59:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:13,996 INFO L225 Difference]: With dead ends: 199 [2022-07-12 03:59:13,996 INFO L226 Difference]: Without dead ends: 195 [2022-07-12 03:59:13,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-12 03:59:13,999 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:13,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 18 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-12 03:59:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-07-12 03:59:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-07-12 03:59:14,017 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-07-12 03:59:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:14,017 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-07-12 03:59:14,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-07-12 03:59:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-12 03:59:14,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:14,022 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:14,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 03:59:14,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:14,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 6 times [2022-07-12 03:59:14,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:14,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229686668] [2022-07-12 03:59:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:14,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229686668] [2022-07-12 03:59:17,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229686668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291592381] [2022-07-12 03:59:17,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:17,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:17,023 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) [2022-07-12 03:59:17,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 03:59:17,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-07-12 03:59:17,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-12 03:59:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:17,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:25,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291592381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:25,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:25,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-07-12 03:59:25,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488246852] [2022-07-12 03:59:25,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:25,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-07-12 03:59:25,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-07-12 03:59:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-12 03:59:25,112 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:25,595 INFO L93 Difference]: Finished difference Result 391 states and 486 transitions. [2022-07-12 03:59:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-07-12 03:59:25,596 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 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 194 [2022-07-12 03:59:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:25,598 INFO L225 Difference]: With dead ends: 391 [2022-07-12 03:59:25,598 INFO L226 Difference]: Without dead ends: 387 [2022-07-12 03:59:25,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-12 03:59:25,600 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 285 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:25,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 18 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 03:59:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-12 03:59:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-07-12 03:59:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2022-07-12 03:59:25,613 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2022-07-12 03:59:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:25,613 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2022-07-12 03:59:25,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.005181347150259) internal successors, (387), 193 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2022-07-12 03:59:25,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-07-12 03:59:25,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:25,617 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:25,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:25,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:25,834 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:25,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1658733399, now seen corresponding path program 7 times [2022-07-12 03:59:25,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:25,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852160913] [2022-07-12 03:59:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:25,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:36,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852160913] [2022-07-12 03:59:36,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852160913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:36,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029408912] [2022-07-12 03:59:36,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:36,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:36,330 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) [2022-07-12 03:59:36,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 03:59:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 192 conjunts are in the unsatisfiable core [2022-07-12 03:59:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:36,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:07,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029408912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:07,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:07,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-07-12 04:00:07,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876958741] [2022-07-12 04:00:07,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:07,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-07-12 04:00:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-07-12 04:00:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-07-12 04:00:07,894 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:10,452 INFO L93 Difference]: Finished difference Result 775 states and 966 transitions. [2022-07-12 04:00:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-07-12 04:00:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 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 386 [2022-07-12 04:00:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:10,457 INFO L225 Difference]: With dead ends: 775 [2022-07-12 04:00:10,457 INFO L226 Difference]: Without dead ends: 771 [2022-07-12 04:00:10,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-07-12 04:00:10,467 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 573 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:10,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 24 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 04:00:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-07-12 04:00:10,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-07-12 04:00:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2022-07-12 04:00:10,491 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2022-07-12 04:00:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:10,492 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2022-07-12 04:00:10,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0025974025974027) internal successors, (771), 385 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2022-07-12 04:00:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-07-12 04:00:10,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:10,509 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:10,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:10,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:10,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1786531369, now seen corresponding path program 8 times [2022-07-12 04:00:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215005663] [2022-07-12 04:00:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:52,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:52,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215005663] [2022-07-12 04:00:52,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215005663] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:52,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348851688] [2022-07-12 04:00:52,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:52,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:52,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:52,371 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) [2022-07-12 04:00:52,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:00:52,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:52,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:52,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 384 conjunts are in the unsatisfiable core [2022-07-12 04:00:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:53,398 INFO L328 TraceCheckSpWp]: Computing backward predicates...