./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-invgen/fragtest_simple.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 be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:17:38,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:17:38,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:17:39,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:17:39,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:17:39,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:17:39,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:17:39,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:17:39,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:17:39,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:17:39,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:17:39,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:17:39,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:17:39,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:17:39,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:17:39,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:17:39,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:17:39,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:17:39,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:17:39,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:17:39,038 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:17:39,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:17:39,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:17:39,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:17:39,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:17:39,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:17:39,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:17:39,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:17:39,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:17:39,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:17:39,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:17:39,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:17:39,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:17:39,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:17:39,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:17:39,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:17:39,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:17:39,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:17:39,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:17:39,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:17:39,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:17:39,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:17:39,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:17:39,082 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:17:39,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:17:39,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:17:39,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:17:39,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:17:39,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:17:39,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:17:39,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:17:39,085 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:17:39,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:17:39,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:17:39,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:17:39,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:17:39,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:17:39,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:17:39,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:17:39,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:17:39,087 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:17:39,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:17:39,088 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:17:39,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:17:39,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:17:39,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:17:39,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:17:39,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:17:39,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:17:39,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:17:39,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:17:39,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:17:39,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:17:39,090 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:17:39,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:17:39,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:17:39,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2022-07-22 15:17:39,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:17:39,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:17:39,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:17:39,338 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:17:39,338 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:17:39,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2022-07-22 15:17:39,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4ae15de/7a9e9abb3d4d4cda8d04ce6441906e23/FLAG0afd6172c [2022-07-22 15:17:39,778 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:17:39,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2022-07-22 15:17:39,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4ae15de/7a9e9abb3d4d4cda8d04ce6441906e23/FLAG0afd6172c [2022-07-22 15:17:39,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4ae15de/7a9e9abb3d4d4cda8d04ce6441906e23 [2022-07-22 15:17:39,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:17:39,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:17:39,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:17:39,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:17:39,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:17:39,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:17:39" (1/1) ... [2022-07-22 15:17:39,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acfd4d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:39, skipping insertion in model container [2022-07-22 15:17:39,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:17:39" (1/1) ... [2022-07-22 15:17:39,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:17:39,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:17:39,956 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-invgen/fragtest_simple.i[893,906] [2022-07-22 15:17:39,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:17:39,982 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:17:39,999 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-invgen/fragtest_simple.i[893,906] [2022-07-22 15:17:40,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:17:40,020 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:17:40,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40 WrapperNode [2022-07-22 15:17:40,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:17:40,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:17:40,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:17:40,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:17:40,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,053 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-22 15:17:40,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:17:40,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:17:40,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:17:40,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:17:40,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:17:40,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:17:40,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:17:40,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:17:40,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (1/1) ... [2022-07-22 15:17:40,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:17:40,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:40,105 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) [2022-07-22 15:17:40,107 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 [2022-07-22 15:17:40,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:17:40,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:17:40,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:17:40,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:17:40,178 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:17:40,179 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:17:40,259 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:17:40,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:17:40,264 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 15:17:40,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:17:40 BoogieIcfgContainer [2022-07-22 15:17:40,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:17:40,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:17:40,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:17:40,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:17:40,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:17:39" (1/3) ... [2022-07-22 15:17:40,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dd163d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:17:40, skipping insertion in model container [2022-07-22 15:17:40,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:17:40" (2/3) ... [2022-07-22 15:17:40,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dd163d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:17:40, skipping insertion in model container [2022-07-22 15:17:40,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:17:40" (3/3) ... [2022-07-22 15:17:40,281 INFO L111 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2022-07-22 15:17:40,293 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:17:40,293 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:17:40,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:17:40,337 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@3ada1922, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@58b009ff [2022-07-22 15:17:40,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:17:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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) [2022-07-22 15:17:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 15:17:40,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:40,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:40,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:40,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2022-07-22 15:17:40,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:40,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795767131] [2022-07-22 15:17:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:40,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:40,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795767131] [2022-07-22 15:17:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795767131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:17:40,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:17:40,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:17:40,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498244053] [2022-07-22 15:17:40,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:17:40,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:17:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:40,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:17:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:17:40,503 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:40,517 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2022-07-22 15:17:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:17:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-07-22 15:17:40,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:40,536 INFO L225 Difference]: With dead ends: 34 [2022-07-22 15:17:40,536 INFO L226 Difference]: Without dead ends: 15 [2022-07-22 15:17:40,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:17:40,543 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:40,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:17:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-22 15:17:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-22 15:17:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-07-22 15:17:40,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2022-07-22 15:17:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:40,583 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-07-22 15:17:40,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-07-22 15:17:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 15:17:40,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:40,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:40,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:17:40,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2022-07-22 15:17:40,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:40,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777676794] [2022-07-22 15:17:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:40,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:40,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:40,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777676794] [2022-07-22 15:17:40,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777676794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:17:40,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:17:40,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 15:17:40,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434274650] [2022-07-22 15:17:40,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:17:40,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:17:40,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:17:40,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:17:40,746 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:40,799 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-07-22 15:17:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:17:40,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 15:17:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:40,801 INFO L225 Difference]: With dead ends: 20 [2022-07-22 15:17:40,801 INFO L226 Difference]: Without dead ends: 18 [2022-07-22 15:17:40,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:17:40,803 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:40,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:17:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-22 15:17:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-07-22 15:17:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-22 15:17:40,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-07-22 15:17:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:40,808 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-22 15:17:40,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-22 15:17:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 15:17:40,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:40,810 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:40,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:17:40,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2022-07-22 15:17:40,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:40,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769329418] [2022-07-22 15:17:40,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:40,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:40,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769329418] [2022-07-22 15:17:40,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769329418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:17:40,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:17:40,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:17:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291430616] [2022-07-22 15:17:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:17:40,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:17:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:40,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:17:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:17:40,885 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:40,927 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-07-22 15:17:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:17:40,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 15:17:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:40,928 INFO L225 Difference]: With dead ends: 34 [2022-07-22 15:17:40,928 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 15:17:40,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:17:40,930 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:40,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:17:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 15:17:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-07-22 15:17:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-07-22 15:17:40,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2022-07-22 15:17:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:40,935 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-07-22 15:17:40,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-07-22 15:17:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 15:17:40,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:40,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:40,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 15:17:40,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2022-07-22 15:17:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:40,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326740351] [2022-07-22 15:17:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:40,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:41,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326740351] [2022-07-22 15:17:41,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326740351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883395188] [2022-07-22 15:17:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:41,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:41,035 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) [2022-07-22 15:17:41,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:17:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 15:17:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:41,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:41,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883395188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:41,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:41,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-07-22 15:17:41,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880241686] [2022-07-22 15:17:41,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:41,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:17:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:41,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:17:41,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 15:17:41,292 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:41,518 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-07-22 15:17:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:17:41,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-22 15:17:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:41,519 INFO L225 Difference]: With dead ends: 45 [2022-07-22 15:17:41,519 INFO L226 Difference]: Without dead ends: 34 [2022-07-22 15:17:41,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-07-22 15:17:41,521 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:41,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-22 15:17:41,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-07-22 15:17:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-22 15:17:41,528 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-07-22 15:17:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:41,546 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-22 15:17:41,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-22 15:17:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 15:17:41,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:41,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:41,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:41,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:41,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2022-07-22 15:17:41,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686695720] [2022-07-22 15:17:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:41,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:41,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686695720] [2022-07-22 15:17:41,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686695720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:41,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705042136] [2022-07-22 15:17:41,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:17:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:41,832 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) [2022-07-22 15:17:41,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:17:41,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:17:41,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:41,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 15:17:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:41,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:42,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705042136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:42,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:42,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-07-22 15:17:42,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375540516] [2022-07-22 15:17:42,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:42,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:17:42,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:17:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-22 15:17:42,023 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:42,240 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-07-22 15:17:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 15:17:42,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-22 15:17:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:42,243 INFO L225 Difference]: With dead ends: 61 [2022-07-22 15:17:42,243 INFO L226 Difference]: Without dead ends: 46 [2022-07-22 15:17:42,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-07-22 15:17:42,244 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:42,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 59 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-22 15:17:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2022-07-22 15:17:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-22 15:17:42,250 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2022-07-22 15:17:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:42,251 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-22 15:17:42,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-22 15:17:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 15:17:42,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:42,256 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:42,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 15:17:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:42,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1976024800, now seen corresponding path program 3 times [2022-07-22 15:17:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:42,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411211301] [2022-07-22 15:17:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:42,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:42,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411211301] [2022-07-22 15:17:42,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411211301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:42,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911030349] [2022-07-22 15:17:42,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:17:42,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:42,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:42,566 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) [2022-07-22 15:17:42,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:17:42,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 15:17:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 15:17:42,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:42,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:42,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911030349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:42,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:42,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2022-07-22 15:17:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80300337] [2022-07-22 15:17:42,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 15:17:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 15:17:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-22 15:17:42,760 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:43,040 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-07-22 15:17:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:17:43,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-22 15:17:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:43,042 INFO L225 Difference]: With dead ends: 75 [2022-07-22 15:17:43,043 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 15:17:43,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-07-22 15:17:43,044 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:43,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 93 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 15:17:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2022-07-22 15:17:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-07-22 15:17:43,054 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2022-07-22 15:17:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:43,055 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-07-22 15:17:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-07-22 15:17:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 15:17:43,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:43,056 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:43,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:43,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:43,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash -634009032, now seen corresponding path program 4 times [2022-07-22 15:17:43,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:43,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480892656] [2022-07-22 15:17:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:43,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480892656] [2022-07-22 15:17:43,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480892656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352136494] [2022-07-22 15:17:43,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:17:43,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:43,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:43,363 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) [2022-07-22 15:17:43,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:17:43,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:17:43,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 15:17:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:43,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:43,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352136494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:43,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:43,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-22 15:17:43,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027914574] [2022-07-22 15:17:43,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:43,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 15:17:43,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 15:17:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:17:43,616 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:43,728 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2022-07-22 15:17:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 15:17:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 36 [2022-07-22 15:17:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:43,729 INFO L225 Difference]: With dead ends: 82 [2022-07-22 15:17:43,730 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 15:17:43,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-22 15:17:43,731 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:43,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 15:17:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2022-07-22 15:17:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-07-22 15:17:43,737 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2022-07-22 15:17:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:43,738 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-07-22 15:17:43,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-07-22 15:17:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 15:17:43,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:43,739 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:43,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:43,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:43,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:43,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1017343069, now seen corresponding path program 5 times [2022-07-22 15:17:43,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:43,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247649098] [2022-07-22 15:17:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:43,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:44,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:44,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247649098] [2022-07-22 15:17:44,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247649098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:44,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590818556] [2022-07-22 15:17:44,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:17:44,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:44,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:44,050 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) [2022-07-22 15:17:44,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:17:44,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 15:17:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:44,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 15:17:44,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:44,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:44,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590818556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:44,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:44,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-07-22 15:17:44,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973623594] [2022-07-22 15:17:44,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:44,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:17:44,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:17:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-22 15:17:44,217 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:44,325 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-07-22 15:17:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 15:17:44,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-22 15:17:44,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:44,326 INFO L225 Difference]: With dead ends: 56 [2022-07-22 15:17:44,326 INFO L226 Difference]: Without dead ends: 54 [2022-07-22 15:17:44,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2022-07-22 15:17:44,328 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:44,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 86 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:17:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-22 15:17:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2022-07-22 15:17:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-07-22 15:17:44,335 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 38 [2022-07-22 15:17:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:44,335 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-07-22 15:17:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-07-22 15:17:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 15:17:44,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:44,336 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:44,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:44,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:44,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1327501635, now seen corresponding path program 6 times [2022-07-22 15:17:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:44,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057612262] [2022-07-22 15:17:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 57 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:44,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:44,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057612262] [2022-07-22 15:17:44,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057612262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:44,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836014479] [2022-07-22 15:17:44,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:17:44,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:44,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:44,714 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) [2022-07-22 15:17:44,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:17:44,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 15:17:44,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:17:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:44,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:45,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836014479] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:45,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:45,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-07-22 15:17:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540893438] [2022-07-22 15:17:45,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:45,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 15:17:45,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 15:17:45,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-07-22 15:17:45,027 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:45,265 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2022-07-22 15:17:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 15:17:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-22 15:17:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:45,266 INFO L225 Difference]: With dead ends: 133 [2022-07-22 15:17:45,267 INFO L226 Difference]: Without dead ends: 79 [2022-07-22 15:17:45,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 15:17:45,268 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:45,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 165 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-22 15:17:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2022-07-22 15:17:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-07-22 15:17:45,275 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2022-07-22 15:17:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:45,276 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-07-22 15:17:45,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-07-22 15:17:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 15:17:45,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:45,277 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:45,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:45,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 359898061, now seen corresponding path program 7 times [2022-07-22 15:17:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:45,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855084858] [2022-07-22 15:17:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 42 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:45,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:45,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855084858] [2022-07-22 15:17:45,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855084858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:45,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560660704] [2022-07-22 15:17:45,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:17:45,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:45,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:45,608 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) [2022-07-22 15:17:45,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:17:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 15:17:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:45,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:45,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560660704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:45,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:45,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2022-07-22 15:17:45,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085263438] [2022-07-22 15:17:45,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:45,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:17:45,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:17:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:17:45,852 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:45,981 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-07-22 15:17:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 15:17:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2022-07-22 15:17:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:45,982 INFO L225 Difference]: With dead ends: 68 [2022-07-22 15:17:45,982 INFO L226 Difference]: Without dead ends: 66 [2022-07-22 15:17:45,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2022-07-22 15:17:45,983 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:45,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 99 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-22 15:17:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2022-07-22 15:17:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-07-22 15:17:45,998 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 50 [2022-07-22 15:17:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:45,998 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-07-22 15:17:45,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-07-22 15:17:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 15:17:45,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:46,000 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:46,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:46,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:46,226 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash -968765261, now seen corresponding path program 8 times [2022-07-22 15:17:46,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:46,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936519613] [2022-07-22 15:17:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:46,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 107 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:46,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936519613] [2022-07-22 15:17:46,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936519613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720074959] [2022-07-22 15:17:46,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:17:46,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:46,404 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) [2022-07-22 15:17:46,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:17:46,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:17:46,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 15:17:46,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:17:46,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:17:46,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720074959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:46,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:46,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 29 [2022-07-22 15:17:46,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929776351] [2022-07-22 15:17:46,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:46,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 15:17:46,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 15:17:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-07-22 15:17:46,773 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:46,967 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2022-07-22 15:17:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 15:17:46,968 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-22 15:17:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:46,968 INFO L225 Difference]: With dead ends: 130 [2022-07-22 15:17:46,968 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 15:17:46,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 15:17:46,970 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:46,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 132 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 15:17:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2022-07-22 15:17:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-22 15:17:46,977 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2022-07-22 15:17:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:46,977 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-22 15:17:46,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-22 15:17:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 15:17:46,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:46,979 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:47,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:47,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 15:17:47,191 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 85268760, now seen corresponding path program 9 times [2022-07-22 15:17:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386512284] [2022-07-22 15:17:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 107 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:47,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386512284] [2022-07-22 15:17:47,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386512284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607302266] [2022-07-22 15:17:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:17:47,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:47,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:47,397 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:47,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 15:17:47,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 15:17:47,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:47,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 15:17:47,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:47,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:47,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607302266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:47,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:47,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2022-07-22 15:17:47,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471990669] [2022-07-22 15:17:47,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:47,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 15:17:47,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 15:17:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-07-22 15:17:47,800 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:48,021 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2022-07-22 15:17:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 15:17:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 15:17:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:48,022 INFO L225 Difference]: With dead ends: 138 [2022-07-22 15:17:48,022 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 15:17:48,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 15:17:48,023 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:48,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 190 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 15:17:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2022-07-22 15:17:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-07-22 15:17:48,032 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2022-07-22 15:17:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:48,032 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-07-22 15:17:48,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-07-22 15:17:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 15:17:48,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:48,033 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:48,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:48,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:48,234 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:48,234 INFO L85 PathProgramCache]: Analyzing trace with hash -600318915, now seen corresponding path program 10 times [2022-07-22 15:17:48,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:48,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536859960] [2022-07-22 15:17:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:48,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536859960] [2022-07-22 15:17:48,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536859960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743700186] [2022-07-22 15:17:48,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:17:48,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:48,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:48,369 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:48,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 15:17:48,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:17:48,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 15:17:48,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:48,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:48,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743700186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:48,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:48,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2022-07-22 15:17:48,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109189010] [2022-07-22 15:17:48,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:48,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 15:17:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:48,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 15:17:48,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:17:48,580 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:48,729 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-22 15:17:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 15:17:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 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 62 [2022-07-22 15:17:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:48,730 INFO L225 Difference]: With dead ends: 80 [2022-07-22 15:17:48,730 INFO L226 Difference]: Without dead ends: 78 [2022-07-22 15:17:48,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-07-22 15:17:48,731 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:48,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 138 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-22 15:17:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2022-07-22 15:17:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-07-22 15:17:48,743 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2022-07-22 15:17:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:48,744 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-07-22 15:17:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-07-22 15:17:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 15:17:48,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:48,745 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:48,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:48,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 15:17:48,959 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2101960413, now seen corresponding path program 11 times [2022-07-22 15:17:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:48,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520971126] [2022-07-22 15:17:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:48,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520971126] [2022-07-22 15:17:49,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520971126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664073460] [2022-07-22 15:17:49,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:17:49,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:49,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:49,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 15:17:49,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-22 15:17:49,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 15:17:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:49,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:49,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664073460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:49,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:49,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2022-07-22 15:17:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768538952] [2022-07-22 15:17:49,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:49,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 15:17:49,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 15:17:49,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 15:17:49,735 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:50,106 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2022-07-22 15:17:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 15:17:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-22 15:17:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:50,107 INFO L225 Difference]: With dead ends: 205 [2022-07-22 15:17:50,107 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 15:17:50,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 15:17:50,109 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:50,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 214 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:17:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 15:17:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2022-07-22 15:17:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-07-22 15:17:50,116 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2022-07-22 15:17:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:50,116 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-07-22 15:17:50,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-07-22 15:17:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 15:17:50,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:50,117 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:50,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:50,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 15:17:50,331 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1953124947, now seen corresponding path program 12 times [2022-07-22 15:17:50,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:50,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098421640] [2022-07-22 15:17:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:50,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 110 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:50,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098421640] [2022-07-22 15:17:50,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098421640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60994155] [2022-07-22 15:17:50,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:17:50,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:50,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:50,472 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:50,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 15:17:50,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-22 15:17:50,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 15:17:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:50,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:50,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60994155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:50,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:50,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2022-07-22 15:17:50,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745217914] [2022-07-22 15:17:50,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:50,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 15:17:50,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:50,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 15:17:50,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2022-07-22 15:17:50,753 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:50,941 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-07-22 15:17:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 15:17:50,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 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 74 [2022-07-22 15:17:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:50,942 INFO L225 Difference]: With dead ends: 92 [2022-07-22 15:17:50,942 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 15:17:50,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-07-22 15:17:50,944 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:50,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 139 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:50,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 15:17:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2022-07-22 15:17:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-07-22 15:17:50,951 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 74 [2022-07-22 15:17:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:50,952 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-07-22 15:17:50,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-07-22 15:17:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 15:17:50,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:50,953 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:50,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 15:17:51,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 15:17:51,167 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1101267603, now seen corresponding path program 13 times [2022-07-22 15:17:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60577077] [2022-07-22 15:17:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:51,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 255 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:51,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60577077] [2022-07-22 15:17:51,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60577077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:51,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659579378] [2022-07-22 15:17:51,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:17:51,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:51,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:51,424 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:51,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 15:17:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:51,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 15:17:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:17:51,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:17:51,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659579378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:51,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:51,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2022-07-22 15:17:51,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740862764] [2022-07-22 15:17:51,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:51,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 15:17:51,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 15:17:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 15:17:51,959 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:52,280 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2022-07-22 15:17:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 15:17:52,280 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-22 15:17:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:52,281 INFO L225 Difference]: With dead ends: 186 [2022-07-22 15:17:52,281 INFO L226 Difference]: Without dead ends: 133 [2022-07-22 15:17:52,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=2061, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 15:17:52,283 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:52,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 330 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:17:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-22 15:17:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2022-07-22 15:17:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-07-22 15:17:52,290 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 82 [2022-07-22 15:17:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:52,291 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-07-22 15:17:52,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-07-22 15:17:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 15:17:52,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:52,292 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:52,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:52,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 15:17:52,507 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1272075272, now seen corresponding path program 14 times [2022-07-22 15:17:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:52,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532749581] [2022-07-22 15:17:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:52,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:52,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532749581] [2022-07-22 15:17:52,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532749581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:52,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886768699] [2022-07-22 15:17:52,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:17:52,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:52,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:52,839 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:52,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 15:17:52,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:17:52,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 15:17:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:53,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:53,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886768699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:53,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:53,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 42 [2022-07-22 15:17:53,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555059446] [2022-07-22 15:17:53,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:53,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 15:17:53,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 15:17:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 15:17:53,321 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:54,252 INFO L93 Difference]: Finished difference Result 201 states and 232 transitions. [2022-07-22 15:17:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-22 15:17:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-07-22 15:17:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:54,253 INFO L225 Difference]: With dead ends: 201 [2022-07-22 15:17:54,253 INFO L226 Difference]: Without dead ends: 146 [2022-07-22 15:17:54,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1501, Invalid=7241, Unknown=0, NotChecked=0, Total=8742 [2022-07-22 15:17:54,256 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 340 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:54,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 200 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:17:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-22 15:17:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 91. [2022-07-22 15:17:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-07-22 15:17:54,266 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2022-07-22 15:17:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:54,267 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-07-22 15:17:54,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-07-22 15:17:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 15:17:54,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:54,268 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:54,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:54,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:54,479 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash -641963184, now seen corresponding path program 15 times [2022-07-22 15:17:54,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:54,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600016233] [2022-07-22 15:17:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:54,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:54,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600016233] [2022-07-22 15:17:54,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600016233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158438678] [2022-07-22 15:17:54,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:17:54,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:54,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:54,829 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:54,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 15:17:54,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-22 15:17:54,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:54,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 15:17:54,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:55,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:55,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158438678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:55,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:55,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-07-22 15:17:55,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210494923] [2022-07-22 15:17:55,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:55,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 15:17:55,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:55,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 15:17:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 15:17:55,428 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:55,805 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2022-07-22 15:17:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 15:17:55,805 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-22 15:17:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:55,806 INFO L225 Difference]: With dead ends: 208 [2022-07-22 15:17:55,806 INFO L226 Difference]: Without dead ends: 149 [2022-07-22 15:17:55,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 15:17:55,808 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 144 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:55,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 322 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:17:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-22 15:17:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2022-07-22 15:17:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-07-22 15:17:55,815 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 90 [2022-07-22 15:17:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:55,815 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-07-22 15:17:55,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-07-22 15:17:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 15:17:55,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:55,816 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:55,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:56,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 15:17:56,039 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:56,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1603067829, now seen corresponding path program 16 times [2022-07-22 15:17:56,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:56,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133088713] [2022-07-22 15:17:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:56,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:56,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:56,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133088713] [2022-07-22 15:17:56,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133088713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:56,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308803789] [2022-07-22 15:17:56,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:17:56,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:56,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:56,228 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:56,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 15:17:56,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:17:56,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:56,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 15:17:56,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:56,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:56,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308803789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:56,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:56,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2022-07-22 15:17:56,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841078501] [2022-07-22 15:17:56,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:56,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 15:17:56,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:56,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 15:17:56,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-07-22 15:17:56,514 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:56,722 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2022-07-22 15:17:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 15:17:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-22 15:17:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:56,723 INFO L225 Difference]: With dead ends: 110 [2022-07-22 15:17:56,723 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 15:17:56,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=904, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 15:17:56,724 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:56,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 197 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 15:17:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2022-07-22 15:17:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-07-22 15:17:56,731 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 92 [2022-07-22 15:17:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:56,731 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-07-22 15:17:56,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-07-22 15:17:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 15:17:56,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:56,732 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:56,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:56,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:56,943 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash 778874011, now seen corresponding path program 17 times [2022-07-22 15:17:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:56,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396536468] [2022-07-22 15:17:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:57,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:57,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396536468] [2022-07-22 15:17:57,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396536468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:57,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381616492] [2022-07-22 15:17:57,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:17:57,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:57,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:57,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:57,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 15:17:57,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-22 15:17:57,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:57,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 15:17:57,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:57,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:58,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381616492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:58,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:58,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2022-07-22 15:17:58,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205159311] [2022-07-22 15:17:58,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:58,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 15:17:58,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 15:17:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2106, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 15:17:58,083 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:58,674 INFO L93 Difference]: Finished difference Result 295 states and 332 transitions. [2022-07-22 15:17:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 15:17:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-07-22 15:17:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:58,676 INFO L225 Difference]: With dead ends: 295 [2022-07-22 15:17:58,676 INFO L226 Difference]: Without dead ends: 169 [2022-07-22 15:17:58,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1721, Invalid=5251, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 15:17:58,678 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 221 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:58,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 466 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:17:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-22 15:17:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 105. [2022-07-22 15:17:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-07-22 15:17:58,687 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 100 [2022-07-22 15:17:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:58,687 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-07-22 15:17:58,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-07-22 15:17:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 15:17:58,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:58,688 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:58,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:58,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:58,904 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -706040923, now seen corresponding path program 18 times [2022-07-22 15:17:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:58,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078766946] [2022-07-22 15:17:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:58,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:17:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:17:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:59,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:17:59,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078766946] [2022-07-22 15:17:59,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078766946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:17:59,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240296327] [2022-07-22 15:17:59,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:17:59,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:17:59,131 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:17:59,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 15:17:59,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-22 15:17:59,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:17:59,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 15:17:59,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:17:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:59,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:17:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:17:59,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240296327] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:17:59,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:17:59,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2022-07-22 15:17:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016872782] [2022-07-22 15:17:59,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:17:59,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 15:17:59,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:17:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 15:17:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2022-07-22 15:17:59,516 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:17:59,778 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-07-22 15:17:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 15:17:59,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-07-22 15:17:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:17:59,779 INFO L225 Difference]: With dead ends: 122 [2022-07-22 15:17:59,779 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 15:17:59,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=617, Invalid=1105, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 15:17:59,781 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 116 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:17:59,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 163 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:17:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 15:17:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2022-07-22 15:17:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-07-22 15:17:59,792 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 104 [2022-07-22 15:17:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:17:59,792 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-07-22 15:17:59,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:17:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-07-22 15:17:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 15:17:59,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:17:59,793 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:17:59,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 15:17:59,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:17:59,995 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:17:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:17:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1006078091, now seen corresponding path program 19 times [2022-07-22 15:17:59,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:17:59,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104474295] [2022-07-22 15:17:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:17:59,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:00,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104474295] [2022-07-22 15:18:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104474295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:00,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292227018] [2022-07-22 15:18:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:18:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:00,468 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:00,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 15:18:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 15:18:00,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:18:01,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:18:01,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292227018] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:01,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:01,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2022-07-22 15:18:01,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445539244] [2022-07-22 15:18:01,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:01,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 15:18:01,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 15:18:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 15:18:01,294 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:01,755 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2022-07-22 15:18:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 15:18:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-22 15:18:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:01,757 INFO L225 Difference]: With dead ends: 256 [2022-07-22 15:18:01,757 INFO L226 Difference]: Without dead ends: 183 [2022-07-22 15:18:01,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1320, Invalid=3936, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 15:18:01,759 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 288 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:01,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 307 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:18:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-22 15:18:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2022-07-22 15:18:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-07-22 15:18:01,769 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 112 [2022-07-22 15:18:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:01,769 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-07-22 15:18:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-07-22 15:18:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-22 15:18:01,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:01,770 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:01,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-22 15:18:01,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:01,984 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1154118448, now seen corresponding path program 20 times [2022-07-22 15:18:01,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:01,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364817258] [2022-07-22 15:18:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:01,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:02,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:02,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364817258] [2022-07-22 15:18:02,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364817258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:02,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181848697] [2022-07-22 15:18:02,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:18:02,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:02,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:02,483 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:02,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 15:18:02,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:18:02,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 15:18:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:03,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:03,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181848697] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:03,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:03,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2022-07-22 15:18:03,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981923055] [2022-07-22 15:18:03,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:03,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-22 15:18:03,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:03,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-22 15:18:03,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2022-07-22 15:18:03,388 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:03,842 INFO L93 Difference]: Finished difference Result 264 states and 304 transitions. [2022-07-22 15:18:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 15:18:03,843 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 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 114 [2022-07-22 15:18:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:03,844 INFO L225 Difference]: With dead ends: 264 [2022-07-22 15:18:03,844 INFO L226 Difference]: Without dead ends: 189 [2022-07-22 15:18:03,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 15:18:03,846 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 248 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:03,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 436 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:18:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-22 15:18:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2022-07-22 15:18:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-07-22 15:18:03,856 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 114 [2022-07-22 15:18:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:03,856 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-07-22 15:18:03,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-07-22 15:18:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-22 15:18:03,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:03,857 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:03,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 15:18:04,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 15:18:04,064 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1686980757, now seen corresponding path program 21 times [2022-07-22 15:18:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:04,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704855054] [2022-07-22 15:18:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:04,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:04,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704855054] [2022-07-22 15:18:04,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704855054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933884549] [2022-07-22 15:18:04,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:18:04,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:04,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:04,319 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:04,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 15:18:04,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-22 15:18:04,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 15:18:04,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:04,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:04,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933884549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:04,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:04,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 25 [2022-07-22 15:18:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448262526] [2022-07-22 15:18:04,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:04,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 15:18:04,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 15:18:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2022-07-22 15:18:04,705 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:05,079 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-07-22 15:18:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 15:18:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-07-22 15:18:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:05,080 INFO L225 Difference]: With dead ends: 134 [2022-07-22 15:18:05,080 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 15:18:05,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=744, Invalid=1326, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 15:18:05,082 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:05,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 207 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:18:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 15:18:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-07-22 15:18:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-07-22 15:18:05,097 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 116 [2022-07-22 15:18:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:05,098 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-07-22 15:18:05,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-07-22 15:18:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 15:18:05,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:05,099 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:05,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-22 15:18:05,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 15:18:05,303 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:05,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1134152325, now seen corresponding path program 22 times [2022-07-22 15:18:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:05,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401824019] [2022-07-22 15:18:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:05,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:05,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:05,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401824019] [2022-07-22 15:18:05,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401824019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:05,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458199267] [2022-07-22 15:18:05,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:18:05,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:05,860 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:05,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 15:18:05,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:18:05,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 15:18:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:06,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:06,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458199267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:06,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:06,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2022-07-22 15:18:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751071373] [2022-07-22 15:18:06,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:06,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 15:18:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 15:18:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=3190, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 15:18:06,881 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:07,721 INFO L93 Difference]: Finished difference Result 367 states and 412 transitions. [2022-07-22 15:18:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 15:18:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-07-22 15:18:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:07,722 INFO L225 Difference]: With dead ends: 367 [2022-07-22 15:18:07,722 INFO L226 Difference]: Without dead ends: 209 [2022-07-22 15:18:07,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2629, Invalid=8083, Unknown=0, NotChecked=0, Total=10712 [2022-07-22 15:18:07,724 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 385 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:07,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 531 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:18:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-22 15:18:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2022-07-22 15:18:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-07-22 15:18:07,733 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 124 [2022-07-22 15:18:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:07,733 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-07-22 15:18:07,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-07-22 15:18:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 15:18:07,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:07,734 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:07,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-22 15:18:07,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:07,935 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082821, now seen corresponding path program 23 times [2022-07-22 15:18:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:07,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925507983] [2022-07-22 15:18:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:08,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:08,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925507983] [2022-07-22 15:18:08,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925507983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:08,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770574724] [2022-07-22 15:18:08,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:18:08,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:08,239 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:08,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 15:18:08,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-22 15:18:08,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 15:18:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:08,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:08,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770574724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:08,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:08,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 27 [2022-07-22 15:18:08,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457258332] [2022-07-22 15:18:08,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 15:18:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 15:18:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2022-07-22 15:18:08,664 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:09,080 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2022-07-22 15:18:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 15:18:09,080 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-22 15:18:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:09,081 INFO L225 Difference]: With dead ends: 146 [2022-07-22 15:18:09,081 INFO L226 Difference]: Without dead ends: 144 [2022-07-22 15:18:09,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=883, Invalid=1567, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 15:18:09,082 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:09,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 234 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:18:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-22 15:18:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2022-07-22 15:18:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-07-22 15:18:09,097 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 128 [2022-07-22 15:18:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:09,097 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-07-22 15:18:09,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-07-22 15:18:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-22 15:18:09,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:09,098 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:09,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-22 15:18:09,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:09,320 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:09,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1245590379, now seen corresponding path program 24 times [2022-07-22 15:18:09,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:09,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663849251] [2022-07-22 15:18:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:09,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:09,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:09,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663849251] [2022-07-22 15:18:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663849251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421132971] [2022-07-22 15:18:09,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:18:09,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:09,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:09,907 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:09,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 15:18:10,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-22 15:18:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 15:18:10,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:10,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:11,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421132971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:11,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:11,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2022-07-22 15:18:11,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130150979] [2022-07-22 15:18:11,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:11,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-22 15:18:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-22 15:18:11,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=3816, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 15:18:11,048 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:12,113 INFO L93 Difference]: Finished difference Result 403 states and 452 transitions. [2022-07-22 15:18:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 15:18:12,114 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-07-22 15:18:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:12,115 INFO L225 Difference]: With dead ends: 403 [2022-07-22 15:18:12,115 INFO L226 Difference]: Without dead ends: 229 [2022-07-22 15:18:12,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3155, Invalid=9727, Unknown=0, NotChecked=0, Total=12882 [2022-07-22 15:18:12,118 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 358 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:12,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 635 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:18:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-22 15:18:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 141. [2022-07-22 15:18:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-07-22 15:18:12,137 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 136 [2022-07-22 15:18:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:12,137 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-07-22 15:18:12,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-07-22 15:18:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-22 15:18:12,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:12,139 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:12,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-22 15:18:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 15:18:12,343 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1485376139, now seen corresponding path program 25 times [2022-07-22 15:18:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:12,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469934158] [2022-07-22 15:18:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:12,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:12,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469934158] [2022-07-22 15:18:12,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469934158] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:12,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238139143] [2022-07-22 15:18:12,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:18:12,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:12,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:12,664 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:12,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 15:18:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 15:18:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:12,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:13,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238139143] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:13,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:13,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 29 [2022-07-22 15:18:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730645799] [2022-07-22 15:18:13,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:13,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 15:18:13,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 15:18:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2022-07-22 15:18:13,187 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:13,529 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-07-22 15:18:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 15:18:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-22 15:18:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:13,530 INFO L225 Difference]: With dead ends: 158 [2022-07-22 15:18:13,530 INFO L226 Difference]: Without dead ends: 156 [2022-07-22 15:18:13,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1034, Invalid=1828, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 15:18:13,532 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 184 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:13,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 235 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:18:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-22 15:18:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2022-07-22 15:18:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-07-22 15:18:13,546 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 140 [2022-07-22 15:18:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:13,546 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-07-22 15:18:13,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-07-22 15:18:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-22 15:18:13,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:13,548 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:13,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-22 15:18:13,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 15:18:13,763 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1127939493, now seen corresponding path program 26 times [2022-07-22 15:18:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783673544] [2022-07-22 15:18:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:13,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:14,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783673544] [2022-07-22 15:18:14,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783673544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325683093] [2022-07-22 15:18:14,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:18:14,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:14,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:14,540 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:14,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 15:18:14,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:18:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 15:18:14,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:18:15,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:18:15,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325683093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:15,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:15,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2022-07-22 15:18:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919073014] [2022-07-22 15:18:15,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:15,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-22 15:18:15,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:15,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-22 15:18:15,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=4174, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 15:18:15,712 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:16,396 INFO L93 Difference]: Finished difference Result 340 states and 390 transitions. [2022-07-22 15:18:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 15:18:16,396 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-07-22 15:18:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:16,397 INFO L225 Difference]: With dead ends: 340 [2022-07-22 15:18:16,398 INFO L226 Difference]: Without dead ends: 243 [2022-07-22 15:18:16,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2334, Invalid=6978, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 15:18:16,399 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 322 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:16,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 556 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:18:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-22 15:18:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2022-07-22 15:18:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-07-22 15:18:16,413 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 148 [2022-07-22 15:18:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:16,413 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-07-22 15:18:16,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-07-22 15:18:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 15:18:16,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:16,414 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:16,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-22 15:18:16,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 15:18:16,623 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:16,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1461075584, now seen corresponding path program 27 times [2022-07-22 15:18:16,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:16,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989819529] [2022-07-22 15:18:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:16,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:17,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:17,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989819529] [2022-07-22 15:18:17,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989819529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:17,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850582556] [2022-07-22 15:18:17,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:18:17,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:17,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:17,364 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:17,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 15:18:17,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-07-22 15:18:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-22 15:18:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 552 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:18,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 552 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:18,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850582556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:18,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:18,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27, 27] total 75 [2022-07-22 15:18:18,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017872573] [2022-07-22 15:18:18,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:18,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-22 15:18:18,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-22 15:18:18,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=4598, Unknown=0, NotChecked=0, Total=5550 [2022-07-22 15:18:18,361 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:20,346 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2022-07-22 15:18:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-22 15:18:20,346 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 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 150 [2022-07-22 15:18:20,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:20,348 INFO L225 Difference]: With dead ends: 355 [2022-07-22 15:18:20,348 INFO L226 Difference]: Without dead ends: 256 [2022-07-22 15:18:20,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9588 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4746, Invalid=24324, Unknown=0, NotChecked=0, Total=29070 [2022-07-22 15:18:20,350 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 613 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:20,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 370 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 15:18:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-22 15:18:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 157. [2022-07-22 15:18:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-07-22 15:18:20,369 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 150 [2022-07-22 15:18:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:20,370 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-07-22 15:18:20,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-07-22 15:18:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 15:18:20,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:20,371 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:20,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-22 15:18:20,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:20,591 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash -897123176, now seen corresponding path program 28 times [2022-07-22 15:18:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108777372] [2022-07-22 15:18:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:20,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1083 proven. 669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:21,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:21,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108777372] [2022-07-22 15:18:21,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108777372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:21,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175063319] [2022-07-22 15:18:21,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:18:21,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:21,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:21,423 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:21,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 15:18:21,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:18:21,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:21,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 15:18:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 600 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:22,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 600 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:22,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175063319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:22,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:22,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 28, 28] total 78 [2022-07-22 15:18:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267339412] [2022-07-22 15:18:22,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:22,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-22 15:18:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-22 15:18:22,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=4977, Unknown=0, NotChecked=0, Total=6006 [2022-07-22 15:18:22,453 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:24,533 INFO L93 Difference]: Finished difference Result 369 states and 424 transitions. [2022-07-22 15:18:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-22 15:18:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-07-22 15:18:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:24,535 INFO L225 Difference]: With dead ends: 369 [2022-07-22 15:18:24,535 INFO L226 Difference]: Without dead ends: 266 [2022-07-22 15:18:24,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10425 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5131, Invalid=26375, Unknown=0, NotChecked=0, Total=31506 [2022-07-22 15:18:24,537 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 610 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:24,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 438 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 15:18:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-22 15:18:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 163. [2022-07-22 15:18:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-07-22 15:18:24,556 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 156 [2022-07-22 15:18:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:24,557 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-07-22 15:18:24,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-07-22 15:18:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-22 15:18:24,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:24,558 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:24,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-22 15:18:24,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:24,782 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:24,782 INFO L85 PathProgramCache]: Analyzing trace with hash -548974864, now seen corresponding path program 29 times [2022-07-22 15:18:24,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:24,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167520852] [2022-07-22 15:18:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:24,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1178 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:25,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167520852] [2022-07-22 15:18:25,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167520852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884735834] [2022-07-22 15:18:25,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:18:25,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:25,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:25,711 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:25,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 15:18:25,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-07-22 15:18:25,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:25,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 15:18:25,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:26,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:27,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884735834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:27,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:27,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 82 [2022-07-22 15:18:27,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345228552] [2022-07-22 15:18:27,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-22 15:18:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-22 15:18:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1515, Invalid=5127, Unknown=0, NotChecked=0, Total=6642 [2022-07-22 15:18:27,139 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:27,883 INFO L93 Difference]: Finished difference Result 376 states and 432 transitions. [2022-07-22 15:18:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 15:18:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 0 states have call successors, (0), 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 162 [2022-07-22 15:18:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:27,884 INFO L225 Difference]: With dead ends: 376 [2022-07-22 15:18:27,884 INFO L226 Difference]: Without dead ends: 269 [2022-07-22 15:18:27,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2921, Invalid=8635, Unknown=0, NotChecked=0, Total=11556 [2022-07-22 15:18:27,885 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 424 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:27,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 596 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:18:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-22 15:18:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 165. [2022-07-22 15:18:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-07-22 15:18:27,901 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 162 [2022-07-22 15:18:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:27,901 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-07-22 15:18:27,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-07-22 15:18:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-22 15:18:27,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:27,902 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:27,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-22 15:18:28,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:28,102 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:28,103 INFO L85 PathProgramCache]: Analyzing trace with hash 24503893, now seen corresponding path program 30 times [2022-07-22 15:18:28,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:28,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673627245] [2022-07-22 15:18:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:28,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:28,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:28,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673627245] [2022-07-22 15:18:28,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673627245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:28,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438740506] [2022-07-22 15:18:28,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:18:28,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:28,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:28,551 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:28,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 15:18:28,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-07-22 15:18:28,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:28,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 15:18:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:28,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:29,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438740506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:29,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:29,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 33 [2022-07-22 15:18:29,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764215873] [2022-07-22 15:18:29,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:29,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 15:18:29,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 15:18:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 15:18:29,035 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:29,454 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2022-07-22 15:18:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-22 15:18:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 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 164 [2022-07-22 15:18:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:29,456 INFO L225 Difference]: With dead ends: 182 [2022-07-22 15:18:29,456 INFO L226 Difference]: Without dead ends: 180 [2022-07-22 15:18:29,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1372, Invalid=2410, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 15:18:29,457 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 178 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:29,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 261 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:18:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-22 15:18:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2022-07-22 15:18:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-07-22 15:18:29,475 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 164 [2022-07-22 15:18:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:29,476 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-07-22 15:18:29,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-07-22 15:18:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-22 15:18:29,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:29,477 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:29,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-22 15:18:29,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-22 15:18:29,695 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash 481628987, now seen corresponding path program 31 times [2022-07-22 15:18:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:29,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672457640] [2022-07-22 15:18:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:30,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:30,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672457640] [2022-07-22 15:18:30,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672457640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:30,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093712097] [2022-07-22 15:18:30,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:18:30,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:30,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:30,630 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:30,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 15:18:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 15:18:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:18:31,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:18:32,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093712097] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:32,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:32,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 86 [2022-07-22 15:18:32,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135666728] [2022-07-22 15:18:32,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:32,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-22 15:18:32,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:32,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-22 15:18:32,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=5654, Unknown=0, NotChecked=0, Total=7310 [2022-07-22 15:18:32,097 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:33,103 INFO L93 Difference]: Finished difference Result 396 states and 454 transitions. [2022-07-22 15:18:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-22 15:18:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 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 172 [2022-07-22 15:18:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:33,104 INFO L225 Difference]: With dead ends: 396 [2022-07-22 15:18:33,104 INFO L226 Difference]: Without dead ends: 283 [2022-07-22 15:18:33,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3170, Invalid=9486, Unknown=0, NotChecked=0, Total=12656 [2022-07-22 15:18:33,105 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 371 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:33,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 622 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:18:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-22 15:18:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 175. [2022-07-22 15:18:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-07-22 15:18:33,118 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 172 [2022-07-22 15:18:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:33,119 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-07-22 15:18:33,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-07-22 15:18:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-22 15:18:33,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:33,119 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:33,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-22 15:18:33,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:33,320 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2129825696, now seen corresponding path program 32 times [2022-07-22 15:18:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748421412] [2022-07-22 15:18:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:34,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748421412] [2022-07-22 15:18:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748421412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946249899] [2022-07-22 15:18:34,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:18:34,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:34,346 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:34,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 15:18:34,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:18:34,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:34,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-22 15:18:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:35,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:35,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946249899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:35,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:35,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 31, 31] total 87 [2022-07-22 15:18:35,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677263608] [2022-07-22 15:18:35,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:35,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-22 15:18:35,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:35,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-22 15:18:35,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=6204, Unknown=0, NotChecked=0, Total=7482 [2022-07-22 15:18:35,558 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:38,080 INFO L93 Difference]: Finished difference Result 411 states and 472 transitions. [2022-07-22 15:18:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-22 15:18:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 0 states have call successors, (0), 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 174 [2022-07-22 15:18:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:38,082 INFO L225 Difference]: With dead ends: 411 [2022-07-22 15:18:38,082 INFO L226 Difference]: Without dead ends: 296 [2022-07-22 15:18:38,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13146 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6376, Invalid=33026, Unknown=0, NotChecked=0, Total=39402 [2022-07-22 15:18:38,086 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 633 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:38,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 479 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 15:18:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-22 15:18:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 181. [2022-07-22 15:18:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-07-22 15:18:38,109 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 174 [2022-07-22 15:18:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:38,109 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-07-22 15:18:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-07-22 15:18:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-22 15:18:38,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:38,110 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:38,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-22 15:18:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:38,311 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1983684472, now seen corresponding path program 33 times [2022-07-22 15:18:38,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:38,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759284810] [2022-07-22 15:18:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:38,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1487 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:39,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759284810] [2022-07-22 15:18:39,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759284810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151420953] [2022-07-22 15:18:39,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:18:39,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:39,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:39,339 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:39,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-22 15:18:39,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2022-07-22 15:18:39,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:39,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 15:18:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 812 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:40,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 812 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:40,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151420953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:40,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:40,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 32, 32] total 90 [2022-07-22 15:18:40,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841350338] [2022-07-22 15:18:40,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:40,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-22 15:18:40,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:40,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-22 15:18:40,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1367, Invalid=6643, Unknown=0, NotChecked=0, Total=8010 [2022-07-22 15:18:40,704 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:43,382 INFO L93 Difference]: Finished difference Result 425 states and 488 transitions. [2022-07-22 15:18:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-07-22 15:18:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 0 states have call successors, (0), 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 180 [2022-07-22 15:18:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:43,384 INFO L225 Difference]: With dead ends: 425 [2022-07-22 15:18:43,384 INFO L226 Difference]: Without dead ends: 306 [2022-07-22 15:18:43,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14123 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6821, Invalid=35409, Unknown=0, NotChecked=0, Total=42230 [2022-07-22 15:18:43,386 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 632 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:43,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 447 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 15:18:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-22 15:18:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 187. [2022-07-22 15:18:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-07-22 15:18:43,410 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 180 [2022-07-22 15:18:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:43,411 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-07-22 15:18:43,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-07-22 15:18:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-22 15:18:43,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:43,412 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:43,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-22 15:18:43,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-22 15:18:43,635 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2064523984, now seen corresponding path program 34 times [2022-07-22 15:18:43,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:43,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760876130] [2022-07-22 15:18:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:43,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 1598 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:44,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:44,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760876130] [2022-07-22 15:18:44,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760876130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:44,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697067834] [2022-07-22 15:18:44,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:18:44,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:44,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:44,784 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:44,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-22 15:18:44,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:18:44,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:44,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-22 15:18:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 870 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:45,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 870 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:46,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697067834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:46,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:46,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 33, 33] total 93 [2022-07-22 15:18:46,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496398161] [2022-07-22 15:18:46,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:46,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-22 15:18:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-22 15:18:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1459, Invalid=7097, Unknown=0, NotChecked=0, Total=8556 [2022-07-22 15:18:46,209 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:49,038 INFO L93 Difference]: Finished difference Result 439 states and 504 transitions. [2022-07-22 15:18:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-07-22 15:18:49,038 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 0 states have call successors, (0), 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 186 [2022-07-22 15:18:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:49,040 INFO L225 Difference]: With dead ends: 439 [2022-07-22 15:18:49,040 INFO L226 Difference]: Without dead ends: 316 [2022-07-22 15:18:49,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15135 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7281, Invalid=37875, Unknown=0, NotChecked=0, Total=45156 [2022-07-22 15:18:49,043 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 813 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:49,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 516 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 15:18:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-22 15:18:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 193. [2022-07-22 15:18:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-07-22 15:18:49,068 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 186 [2022-07-22 15:18:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:49,068 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-07-22 15:18:49,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-07-22 15:18:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-22 15:18:49,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:49,069 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:49,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-22 15:18:49,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-22 15:18:49,270 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash -720065944, now seen corresponding path program 35 times [2022-07-22 15:18:49,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:49,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256501179] [2022-07-22 15:18:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1713 proven. 1017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:50,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:50,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256501179] [2022-07-22 15:18:50,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256501179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:50,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862511547] [2022-07-22 15:18:50,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:18:50,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:50,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:50,388 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:50,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-22 15:18:50,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-07-22 15:18:50,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 15:18:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1800 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:52,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1800 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:52,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862511547] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:52,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:52,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 97 [2022-07-22 15:18:52,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549760218] [2022-07-22 15:18:52,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:52,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-22 15:18:52,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-22 15:18:52,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2115, Invalid=7197, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 15:18:52,274 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:53,397 INFO L93 Difference]: Finished difference Result 446 states and 512 transitions. [2022-07-22 15:18:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 15:18:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 0 states have call successors, (0), 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 192 [2022-07-22 15:18:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:53,399 INFO L225 Difference]: With dead ends: 446 [2022-07-22 15:18:53,399 INFO L226 Difference]: Without dead ends: 319 [2022-07-22 15:18:53,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3583 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4101, Invalid=12155, Unknown=0, NotChecked=0, Total=16256 [2022-07-22 15:18:53,401 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 415 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:53,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 783 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:18:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-22 15:18:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2022-07-22 15:18:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-07-22 15:18:53,425 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 192 [2022-07-22 15:18:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:53,425 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-07-22 15:18:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-07-22 15:18:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-22 15:18:53,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:53,427 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:53,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-22 15:18:53,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-22 15:18:53,647 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 12059405, now seen corresponding path program 36 times [2022-07-22 15:18:53,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352305886] [2022-07-22 15:18:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:53,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 930 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:54,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352305886] [2022-07-22 15:18:54,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352305886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:54,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802946002] [2022-07-22 15:18:54,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:18:54,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:54,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:54,170 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:54,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-22 15:18:54,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2022-07-22 15:18:54,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:18:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-22 15:18:54,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:54,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:54,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802946002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:54,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:54,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 38 [2022-07-22 15:18:54,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922181159] [2022-07-22 15:18:54,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:54,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 15:18:54,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 15:18:54,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=802, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 15:18:54,693 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:18:55,185 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2022-07-22 15:18:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 15:18:55,185 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-07-22 15:18:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:18:55,186 INFO L225 Difference]: With dead ends: 212 [2022-07-22 15:18:55,186 INFO L226 Difference]: Without dead ends: 210 [2022-07-22 15:18:55,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1862, Invalid=3250, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 15:18:55,187 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 247 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:18:55,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 283 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:18:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-22 15:18:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2022-07-22 15:18:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2022-07-22 15:18:55,212 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 194 [2022-07-22 15:18:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:18:55,212 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2022-07-22 15:18:55,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:18:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2022-07-22 15:18:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-07-22 15:18:55,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:18:55,214 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:18:55,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-22 15:18:55,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-22 15:18:55,427 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:18:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:18:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash -951388173, now seen corresponding path program 37 times [2022-07-22 15:18:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:18:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993258642] [2022-07-22 15:18:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:18:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:18:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 1955 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:18:56,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:18:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993258642] [2022-07-22 15:18:56,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993258642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:18:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940934981] [2022-07-22 15:18:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:18:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:18:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:18:56,835 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:18:56,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-22 15:18:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:18:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-22 15:18:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:18:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:18:58,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:18:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:18:58,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940934981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:18:58,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:18:58,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 101 [2022-07-22 15:18:58,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141320305] [2022-07-22 15:18:58,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:18:58,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-22 15:18:58,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:18:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-22 15:18:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=7819, Unknown=0, NotChecked=0, Total=10100 [2022-07-22 15:18:58,747 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:00,023 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2022-07-22 15:19:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-22 15:19:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 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 202 [2022-07-22 15:19:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:00,027 INFO L225 Difference]: With dead ends: 466 [2022-07-22 15:19:00,027 INFO L226 Difference]: Without dead ends: 333 [2022-07-22 15:19:00,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3907 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4395, Invalid=13161, Unknown=0, NotChecked=0, Total=17556 [2022-07-22 15:19:00,030 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 477 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:00,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 858 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:19:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-22 15:19:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 205. [2022-07-22 15:19:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-07-22 15:19:00,053 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 202 [2022-07-22 15:19:00,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:00,053 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-07-22 15:19:00,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-07-22 15:19:00,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-22 15:19:00,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:00,055 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:00,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-22 15:19:00,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-22 15:19:00,278 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:00,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1744337320, now seen corresponding path program 38 times [2022-07-22 15:19:00,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:00,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626615041] [2022-07-22 15:19:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:00,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 1955 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:01,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626615041] [2022-07-22 15:19:01,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626615041] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:01,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000949405] [2022-07-22 15:19:01,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:19:01,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:01,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:01,517 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:01,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-22 15:19:01,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:19:01,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:01,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-22 15:19:01,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:03,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:03,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000949405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:03,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:03,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 103 [2022-07-22 15:19:03,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423375752] [2022-07-22 15:19:03,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-22 15:19:03,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-22 15:19:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2383, Invalid=8123, Unknown=0, NotChecked=0, Total=10506 [2022-07-22 15:19:03,495 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:04,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:04,673 INFO L93 Difference]: Finished difference Result 474 states and 544 transitions. [2022-07-22 15:19:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-22 15:19:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 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 204 [2022-07-22 15:19:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:04,675 INFO L225 Difference]: With dead ends: 474 [2022-07-22 15:19:04,675 INFO L226 Difference]: Without dead ends: 339 [2022-07-22 15:19:04,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4046 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4629, Invalid=13731, Unknown=0, NotChecked=0, Total=18360 [2022-07-22 15:19:04,677 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 568 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:04,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 705 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:19:04,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-22 15:19:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 207. [2022-07-22 15:19:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-07-22 15:19:04,706 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 204 [2022-07-22 15:19:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:04,707 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-07-22 15:19:04,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-07-22 15:19:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-22 15:19:04,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:04,708 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:04,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-22 15:19:04,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-22 15:19:04,933 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash 735711101, now seen corresponding path program 39 times [2022-07-22 15:19:04,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:04,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055469146] [2022-07-22 15:19:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:04,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1056 proven. 2114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:05,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:05,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055469146] [2022-07-22 15:19:05,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055469146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:05,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779363499] [2022-07-22 15:19:05,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:19:05,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:05,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:05,463 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:05,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-22 15:19:05,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-07-22 15:19:05,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:05,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-22 15:19:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:05,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:06,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779363499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:06,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:06,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 40 [2022-07-22 15:19:06,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797453072] [2022-07-22 15:19:06,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:06,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 15:19:06,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:06,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 15:19:06,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=885, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 15:19:06,026 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:06,563 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2022-07-22 15:19:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-22 15:19:06,563 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 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 206 [2022-07-22 15:19:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:06,564 INFO L225 Difference]: With dead ends: 224 [2022-07-22 15:19:06,564 INFO L226 Difference]: Without dead ends: 222 [2022-07-22 15:19:06,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2079, Invalid=3621, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 15:19:06,565 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 218 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:06,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 332 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:19:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-22 15:19:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2022-07-22 15:19:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-07-22 15:19:06,583 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 206 [2022-07-22 15:19:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:06,583 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-07-22 15:19:06,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-07-22 15:19:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-22 15:19:06,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:06,585 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:06,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-22 15:19:06,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-22 15:19:06,790 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1013869469, now seen corresponding path program 40 times [2022-07-22 15:19:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:06,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876958886] [2022-07-22 15:19:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:06,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2213 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:08,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:08,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876958886] [2022-07-22 15:19:08,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876958886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691626776] [2022-07-22 15:19:08,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:19:08,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:08,144 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:08,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-22 15:19:08,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:19:08,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-22 15:19:08,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:10,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:10,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691626776] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:10,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:10,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 110 [2022-07-22 15:19:10,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618804] [2022-07-22 15:19:10,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:10,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-07-22 15:19:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-07-22 15:19:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2740, Invalid=9250, Unknown=0, NotChecked=0, Total=11990 [2022-07-22 15:19:10,379 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:12,352 INFO L93 Difference]: Finished difference Result 637 states and 712 transitions. [2022-07-22 15:19:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-22 15:19:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 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 214 [2022-07-22 15:19:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:12,353 INFO L225 Difference]: With dead ends: 637 [2022-07-22 15:19:12,354 INFO L226 Difference]: Without dead ends: 359 [2022-07-22 15:19:12,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7709 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7744, Invalid=24118, Unknown=0, NotChecked=0, Total=31862 [2022-07-22 15:19:12,355 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 652 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:12,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 968 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:19:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-22 15:19:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 219. [2022-07-22 15:19:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.018348623853211) internal successors, (222), 218 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-07-22 15:19:12,376 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 214 [2022-07-22 15:19:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:12,377 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-07-22 15:19:12,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-07-22 15:19:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-22 15:19:12,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:12,378 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:12,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-22 15:19:12,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-22 15:19:12,596 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash 567782637, now seen corresponding path program 41 times [2022-07-22 15:19:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:12,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780764254] [2022-07-22 15:19:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:12,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1190 proven. 2382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:13,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:13,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780764254] [2022-07-22 15:19:13,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780764254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:13,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816559195] [2022-07-22 15:19:13,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:19:13,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:13,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:13,172 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:13,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-22 15:19:13,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-07-22 15:19:13,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:13,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-22 15:19:13,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:13,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:13,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816559195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:13,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:13,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 42 [2022-07-22 15:19:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208921880] [2022-07-22 15:19:13,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:13,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 15:19:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 15:19:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=972, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 15:19:13,753 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:14,341 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2022-07-22 15:19:14,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-22 15:19:14,342 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 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 218 [2022-07-22 15:19:14,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:14,343 INFO L225 Difference]: With dead ends: 236 [2022-07-22 15:19:14,343 INFO L226 Difference]: Without dead ends: 234 [2022-07-22 15:19:14,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 466 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2308, Invalid=4012, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 15:19:14,344 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 271 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:14,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 312 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:19:14,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-22 15:19:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2022-07-22 15:19:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2022-07-22 15:19:14,372 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 218 [2022-07-22 15:19:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:14,372 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2022-07-22 15:19:14,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2022-07-22 15:19:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-22 15:19:14,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:14,373 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:14,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-22 15:19:14,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:14,574 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1116914131, now seen corresponding path program 42 times [2022-07-22 15:19:14,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:14,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142498857] [2022-07-22 15:19:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:14,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2487 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:16,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142498857] [2022-07-22 15:19:16,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142498857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705052668] [2022-07-22 15:19:16,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:19:16,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:16,034 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:16,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-22 15:19:16,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-07-22 15:19:16,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-22 15:19:16,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:18,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:18,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705052668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:18,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:18,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 116 [2022-07-22 15:19:18,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133981953] [2022-07-22 15:19:18,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:18,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-22 15:19:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-22 15:19:18,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3044, Invalid=10296, Unknown=0, NotChecked=0, Total=13340 [2022-07-22 15:19:18,491 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 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) [2022-07-22 15:19:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:20,703 INFO L93 Difference]: Finished difference Result 673 states and 752 transitions. [2022-07-22 15:19:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-07-22 15:19:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 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 226 [2022-07-22 15:19:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:20,704 INFO L225 Difference]: With dead ends: 673 [2022-07-22 15:19:20,704 INFO L226 Difference]: Without dead ends: 379 [2022-07-22 15:19:20,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8595 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8630, Invalid=26902, Unknown=0, NotChecked=0, Total=35532 [2022-07-22 15:19:20,706 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 643 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:20,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1119 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 15:19:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-07-22 15:19:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 231. [2022-07-22 15:19:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2022-07-22 15:19:20,729 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 226 [2022-07-22 15:19:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:20,729 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2022-07-22 15:19:20,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 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) [2022-07-22 15:19:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2022-07-22 15:19:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-22 15:19:20,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:20,731 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:20,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-22 15:19:20,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:20,937 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1125538653, now seen corresponding path program 43 times [2022-07-22 15:19:20,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:20,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881472577] [2022-07-22 15:19:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:20,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1332 proven. 2666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:21,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:21,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881472577] [2022-07-22 15:19:21,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881472577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:21,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747903171] [2022-07-22 15:19:21,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:19:21,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:21,571 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:21,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-22 15:19:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-22 15:19:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:21,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:22,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747903171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:22,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:22,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2022-07-22 15:19:22,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16574706] [2022-07-22 15:19:22,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:22,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 15:19:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 15:19:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1063, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 15:19:22,180 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:22,830 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2022-07-22 15:19:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-22 15:19:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 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 230 [2022-07-22 15:19:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:22,831 INFO L225 Difference]: With dead ends: 248 [2022-07-22 15:19:22,831 INFO L226 Difference]: Without dead ends: 246 [2022-07-22 15:19:22,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 492 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2549, Invalid=4423, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 15:19:22,832 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 205 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:22,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 395 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:19:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-22 15:19:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2022-07-22 15:19:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 238 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 242 transitions. [2022-07-22 15:19:22,865 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 242 transitions. Word has length 230 [2022-07-22 15:19:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:22,865 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 242 transitions. [2022-07-22 15:19:22,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 242 transitions. [2022-07-22 15:19:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-22 15:19:22,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:22,867 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:22,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-22 15:19:23,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-22 15:19:23,083 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1489764285, now seen corresponding path program 44 times [2022-07-22 15:19:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054966403] [2022-07-22 15:19:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2777 proven. 1517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:24,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:24,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054966403] [2022-07-22 15:19:24,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054966403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:24,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362885227] [2022-07-22 15:19:24,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:19:24,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:24,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:24,733 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:24,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-22 15:19:24,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:19:24,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-22 15:19:24,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:19:27,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:19:27,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362885227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:27,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:27,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 119 [2022-07-22 15:19:27,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923768574] [2022-07-22 15:19:27,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-07-22 15:19:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-07-22 15:19:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3163, Invalid=10879, Unknown=0, NotChecked=0, Total=14042 [2022-07-22 15:19:27,311 INFO L87 Difference]: Start difference. First operand 239 states and 242 transitions. Second operand has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:28,778 INFO L93 Difference]: Finished difference Result 550 states and 630 transitions. [2022-07-22 15:19:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-22 15:19:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 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 238 [2022-07-22 15:19:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:28,780 INFO L225 Difference]: With dead ends: 550 [2022-07-22 15:19:28,780 INFO L226 Difference]: Without dead ends: 393 [2022-07-22 15:19:28,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5440 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6129, Invalid=18363, Unknown=0, NotChecked=0, Total=24492 [2022-07-22 15:19:28,782 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 597 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:28,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 921 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:19:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-22 15:19:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 241. [2022-07-22 15:19:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 244 transitions. [2022-07-22 15:19:28,805 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 244 transitions. Word has length 238 [2022-07-22 15:19:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:28,805 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 244 transitions. [2022-07-22 15:19:28,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 244 transitions. [2022-07-22 15:19:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-07-22 15:19:28,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:28,806 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:28,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-22 15:19:29,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-22 15:19:29,026 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1569193944, now seen corresponding path program 45 times [2022-07-22 15:19:29,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:29,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678187547] [2022-07-22 15:19:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2777 proven. 1593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:30,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:30,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678187547] [2022-07-22 15:19:30,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678187547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:30,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863673494] [2022-07-22 15:19:30,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:19:30,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:30,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:30,686 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:30,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-22 15:19:30,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2022-07-22 15:19:30,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 15:19:30,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:33,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:33,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863673494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:33,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:33,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 121 [2022-07-22 15:19:33,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115415953] [2022-07-22 15:19:33,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:33,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-07-22 15:19:33,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:33,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-07-22 15:19:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3283, Invalid=11237, Unknown=0, NotChecked=0, Total=14520 [2022-07-22 15:19:33,381 INFO L87 Difference]: Start difference. First operand 241 states and 244 transitions. Second operand has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:34,886 INFO L93 Difference]: Finished difference Result 558 states and 640 transitions. [2022-07-22 15:19:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-22 15:19:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 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 240 [2022-07-22 15:19:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:34,888 INFO L225 Difference]: With dead ends: 558 [2022-07-22 15:19:34,888 INFO L226 Difference]: Without dead ends: 399 [2022-07-22 15:19:34,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5603 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6405, Invalid=19035, Unknown=0, NotChecked=0, Total=25440 [2022-07-22 15:19:34,890 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 535 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:34,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 983 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:19:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-22 15:19:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 243. [2022-07-22 15:19:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-07-22 15:19:34,923 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 240 [2022-07-22 15:19:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:34,924 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-07-22 15:19:34,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-07-22 15:19:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-22 15:19:34,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:34,925 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:34,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-22 15:19:35,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-22 15:19:35,135 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash -591684915, now seen corresponding path program 46 times [2022-07-22 15:19:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:35,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252406215] [2022-07-22 15:19:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1482 proven. 2966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:35,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:35,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252406215] [2022-07-22 15:19:35,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252406215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:35,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099285478] [2022-07-22 15:19:35,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:19:35,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:35,878 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:35,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-22 15:19:36,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:19:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:36,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-22 15:19:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:36,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:36,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099285478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:36,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:36,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 46 [2022-07-22 15:19:36,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332241476] [2022-07-22 15:19:36,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:36,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 15:19:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 15:19:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1158, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 15:19:36,475 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:37,179 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2022-07-22 15:19:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-22 15:19:37,179 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 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 242 [2022-07-22 15:19:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:37,180 INFO L225 Difference]: With dead ends: 260 [2022-07-22 15:19:37,180 INFO L226 Difference]: Without dead ends: 258 [2022-07-22 15:19:37,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 518 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2802, Invalid=4854, Unknown=0, NotChecked=0, Total=7656 [2022-07-22 15:19:37,181 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 305 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:37,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 391 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:19:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-22 15:19:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2022-07-22 15:19:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2022-07-22 15:19:37,213 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 242 [2022-07-22 15:19:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:37,213 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2022-07-22 15:19:37,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2022-07-22 15:19:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-22 15:19:37,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:37,214 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:37,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-22 15:19:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:37,415 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2128949325, now seen corresponding path program 47 times [2022-07-22 15:19:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:37,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682169444] [2022-07-22 15:19:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3083 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:39,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682169444] [2022-07-22 15:19:39,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682169444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011191727] [2022-07-22 15:19:39,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:19:39,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:39,198 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:39,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-22 15:19:39,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2022-07-22 15:19:39,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:39,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 15:19:39,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:41,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:42,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011191727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:42,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:42,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 128 [2022-07-22 15:19:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927707631] [2022-07-22 15:19:42,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:42,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-22 15:19:42,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-22 15:19:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3700, Invalid=12556, Unknown=0, NotChecked=0, Total=16256 [2022-07-22 15:19:42,118 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:44,778 INFO L93 Difference]: Finished difference Result 745 states and 832 transitions. [2022-07-22 15:19:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-07-22 15:19:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 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 250 [2022-07-22 15:19:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:44,780 INFO L225 Difference]: With dead ends: 745 [2022-07-22 15:19:44,781 INFO L226 Difference]: Without dead ends: 419 [2022-07-22 15:19:44,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10511 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10546, Invalid=32926, Unknown=0, NotChecked=0, Total=43472 [2022-07-22 15:19:44,785 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 900 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:44,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 1232 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 15:19:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-22 15:19:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 255. [2022-07-22 15:19:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.015748031496063) internal successors, (258), 254 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-07-22 15:19:44,835 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 250 [2022-07-22 15:19:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:44,835 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-07-22 15:19:44,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-07-22 15:19:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-22 15:19:44,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:44,837 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:44,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-22 15:19:45,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-22 15:19:45,052 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash 145550141, now seen corresponding path program 48 times [2022-07-22 15:19:45,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:45,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488836866] [2022-07-22 15:19:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:45,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1640 proven. 3282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:45,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:45,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488836866] [2022-07-22 15:19:45,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488836866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:45,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717770367] [2022-07-22 15:19:45,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:19:45,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:45,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:45,847 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:45,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-22 15:19:46,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-07-22 15:19:46,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:46,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-22 15:19:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:46,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:46,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717770367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:46,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:46,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 48 [2022-07-22 15:19:46,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964091500] [2022-07-22 15:19:46,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:46,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 15:19:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 15:19:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=1257, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 15:19:46,543 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:47,259 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-07-22 15:19:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-22 15:19:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 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 254 [2022-07-22 15:19:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:47,261 INFO L225 Difference]: With dead ends: 272 [2022-07-22 15:19:47,261 INFO L226 Difference]: Without dead ends: 270 [2022-07-22 15:19:47,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 544 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3067, Invalid=5305, Unknown=0, NotChecked=0, Total=8372 [2022-07-22 15:19:47,262 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 192 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:47,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 410 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:19:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-22 15:19:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2022-07-22 15:19:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.015267175572519) internal successors, (266), 262 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 266 transitions. [2022-07-22 15:19:47,287 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 266 transitions. Word has length 254 [2022-07-22 15:19:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:47,288 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 266 transitions. [2022-07-22 15:19:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 266 transitions. [2022-07-22 15:19:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-07-22 15:19:47,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:47,289 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:47,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-22 15:19:47,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:47,495 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:47,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1823256611, now seen corresponding path program 49 times [2022-07-22 15:19:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:47,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856432166] [2022-07-22 15:19:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3405 proven. 1845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:49,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:49,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856432166] [2022-07-22 15:19:49,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856432166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:49,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350172754] [2022-07-22 15:19:49,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:19:49,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:49,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:49,433 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:49,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-22 15:19:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:49,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-22 15:19:49,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:19:52,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:19:52,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350172754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:52,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:52,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 131 [2022-07-22 15:19:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415667061] [2022-07-22 15:19:52,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-07-22 15:19:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-07-22 15:19:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3831, Invalid=13199, Unknown=0, NotChecked=0, Total=17030 [2022-07-22 15:19:52,455 INFO L87 Difference]: Start difference. First operand 263 states and 266 transitions. Second operand has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:19:54,261 INFO L93 Difference]: Finished difference Result 606 states and 694 transitions. [2022-07-22 15:19:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-22 15:19:54,261 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 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 262 [2022-07-22 15:19:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:19:54,263 INFO L225 Difference]: With dead ends: 606 [2022-07-22 15:19:54,263 INFO L226 Difference]: Without dead ends: 433 [2022-07-22 15:19:54,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7445, Invalid=22311, Unknown=0, NotChecked=0, Total=29756 [2022-07-22 15:19:54,265 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 613 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:19:54,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1097 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:19:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-07-22 15:19:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 265. [2022-07-22 15:19:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0151515151515151) internal successors, (268), 264 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-07-22 15:19:54,295 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 262 [2022-07-22 15:19:54,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:19:54,295 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-07-22 15:19:54,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:19:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-07-22 15:19:54,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-07-22 15:19:54,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:19:54,297 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:19:54,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-22 15:19:54,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-22 15:19:54,511 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:19:54,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:19:54,512 INFO L85 PathProgramCache]: Analyzing trace with hash -354905848, now seen corresponding path program 50 times [2022-07-22 15:19:54,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:19:54,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466320206] [2022-07-22 15:19:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:19:54,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:19:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:19:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3405 proven. 1929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:56,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:19:56,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466320206] [2022-07-22 15:19:56,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466320206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:19:56,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312975191] [2022-07-22 15:19:56,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:19:56,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:19:56,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:19:56,586 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:19:56,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-22 15:19:56,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:19:56,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:19:56,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-22 15:19:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:19:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 1806 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:58,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:19:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 1806 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:19:59,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312975191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:19:59,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:19:59,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 46, 46] total 132 [2022-07-22 15:19:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303435184] [2022-07-22 15:19:59,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:19:59,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-07-22 15:19:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:19:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-07-22 15:19:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=14364, Unknown=0, NotChecked=0, Total=17292 [2022-07-22 15:19:59,110 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:20:04,282 INFO L93 Difference]: Finished difference Result 621 states and 712 transitions. [2022-07-22 15:20:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-07-22 15:20:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 0 states have call successors, (0), 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 264 [2022-07-22 15:20:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:20:04,285 INFO L225 Difference]: With dead ends: 621 [2022-07-22 15:20:04,285 INFO L226 Difference]: Without dead ends: 446 [2022-07-22 15:20:04,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31476 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=14626, Invalid=77486, Unknown=0, NotChecked=0, Total=92112 [2022-07-22 15:20:04,292 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1156 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 2751 mSolverCounterSat, 929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 2751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:20:04,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 725 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 2751 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 15:20:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-22 15:20:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 271. [2022-07-22 15:20:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 270 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:04,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 274 transitions. [2022-07-22 15:20:04,377 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 274 transitions. Word has length 264 [2022-07-22 15:20:04,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:20:04,377 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 274 transitions. [2022-07-22 15:20:04,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.984848484848485) internal successors, (526), 132 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 274 transitions. [2022-07-22 15:20:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-22 15:20:04,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:20:04,379 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:20:04,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-22 15:20:04,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-07-22 15:20:04,606 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:20:04,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:20:04,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2068373472, now seen corresponding path program 51 times [2022-07-22 15:20:04,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:20:04,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4859967] [2022-07-22 15:20:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:20:04,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:20:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:20:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3572 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:06,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:20:06,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4859967] [2022-07-22 15:20:06,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4859967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:20:06,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227271306] [2022-07-22 15:20:06,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:20:06,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:06,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:20:06,901 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:20:06,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-22 15:20:07,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2022-07-22 15:20:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:20:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-22 15:20:07,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:20:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 1892 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:09,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:20:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 1892 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:09,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227271306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:20:09,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:20:09,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 47, 47] total 135 [2022-07-22 15:20:09,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743202628] [2022-07-22 15:20:09,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:20:09,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-07-22 15:20:09,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:20:09,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-07-22 15:20:09,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3062, Invalid=15028, Unknown=0, NotChecked=0, Total=18090 [2022-07-22 15:20:09,580 INFO L87 Difference]: Start difference. First operand 271 states and 274 transitions. Second operand has 135 states, 135 states have (on average 3.9851851851851854) internal successors, (538), 135 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:20:15,004 INFO L93 Difference]: Finished difference Result 635 states and 728 transitions. [2022-07-22 15:20:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-07-22 15:20:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.9851851851851854) internal successors, (538), 135 states have internal predecessors, (538), 0 states have call successors, (0), 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 270 [2022-07-22 15:20:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:20:15,007 INFO L225 Difference]: With dead ends: 635 [2022-07-22 15:20:15,007 INFO L226 Difference]: Without dead ends: 456 [2022-07-22 15:20:15,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32978 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=15296, Invalid=81114, Unknown=0, NotChecked=0, Total=96410 [2022-07-22 15:20:15,011 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1107 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 921 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 921 IncrementalHoareTripleChecker+Valid, 2859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:20:15,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1107 Valid, 726 Invalid, 3780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [921 Valid, 2859 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 15:20:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-22 15:20:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 277. [2022-07-22 15:20:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 276 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 280 transitions. [2022-07-22 15:20:15,063 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 280 transitions. Word has length 270 [2022-07-22 15:20:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:20:15,063 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 280 transitions. [2022-07-22 15:20:15,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.9851851851851854) internal successors, (538), 135 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 280 transitions. [2022-07-22 15:20:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-07-22 15:20:15,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:20:15,065 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:20:15,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-22 15:20:15,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:15,279 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:20:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:20:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1986014472, now seen corresponding path program 52 times [2022-07-22 15:20:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:20:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477896994] [2022-07-22 15:20:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:20:15,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:20:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:20:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 3743 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:17,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:20:17,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477896994] [2022-07-22 15:20:17,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477896994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:20:17,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201820092] [2022-07-22 15:20:17,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:20:17,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:17,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:20:17,486 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:20:17,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-22 15:20:17,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:20:17,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:20:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-22 15:20:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:20:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 1980 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:19,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:20:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 1980 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:20,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201820092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:20:20,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:20:20,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 48, 48] total 138 [2022-07-22 15:20:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11804390] [2022-07-22 15:20:20,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:20:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-07-22 15:20:20,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:20:20,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-07-22 15:20:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3199, Invalid=15707, Unknown=0, NotChecked=0, Total=18906 [2022-07-22 15:20:20,206 INFO L87 Difference]: Start difference. First operand 277 states and 280 transitions. Second operand has 138 states, 138 states have (on average 3.9855072463768115) internal successors, (550), 138 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:25,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:20:25,801 INFO L93 Difference]: Finished difference Result 649 states and 744 transitions. [2022-07-22 15:20:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-07-22 15:20:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 3.9855072463768115) internal successors, (550), 138 states have internal predecessors, (550), 0 states have call successors, (0), 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 276 [2022-07-22 15:20:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:20:25,803 INFO L225 Difference]: With dead ends: 649 [2022-07-22 15:20:25,803 INFO L226 Difference]: Without dead ends: 466 [2022-07-22 15:20:25,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 867 GetRequests, 550 SyntacticMatches, 1 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34515 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=15981, Invalid=84825, Unknown=0, NotChecked=0, Total=100806 [2022-07-22 15:20:25,807 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1164 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:20:25,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 728 Invalid, 4050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 15:20:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-22 15:20:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 283. [2022-07-22 15:20:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0141843971631206) internal successors, (286), 282 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 286 transitions. [2022-07-22 15:20:25,853 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 286 transitions. Word has length 276 [2022-07-22 15:20:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:20:25,854 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 286 transitions. [2022-07-22 15:20:25,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 3.9855072463768115) internal successors, (550), 138 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 286 transitions. [2022-07-22 15:20:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-07-22 15:20:25,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:20:25,856 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:20:25,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-22 15:20:26,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-22 15:20:26,079 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:20:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:20:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1067181488, now seen corresponding path program 53 times [2022-07-22 15:20:26,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:20:26,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089976435] [2022-07-22 15:20:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:20:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:20:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:20:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 3918 proven. 2202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:28,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:20:28,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089976435] [2022-07-22 15:20:28,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089976435] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:20:28,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446530844] [2022-07-22 15:20:28,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:20:28,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:28,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:20:28,340 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:20:28,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-22 15:20:28,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-07-22 15:20:28,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:20:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-22 15:20:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:20:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 4050 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:31,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:20:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 4050 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:31,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446530844] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:20:31,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:20:31,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 142 [2022-07-22 15:20:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076895372] [2022-07-22 15:20:31,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:20:31,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-07-22 15:20:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:20:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-07-22 15:20:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4515, Invalid=15507, Unknown=0, NotChecked=0, Total=20022 [2022-07-22 15:20:31,876 INFO L87 Difference]: Start difference. First operand 283 states and 286 transitions. Second operand has 142 states, 142 states have (on average 3.3098591549295775) internal successors, (470), 142 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:20:33,936 INFO L93 Difference]: Finished difference Result 656 states and 752 transitions. [2022-07-22 15:20:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-22 15:20:33,936 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.3098591549295775) internal successors, (470), 142 states have internal predecessors, (470), 0 states have call successors, (0), 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 282 [2022-07-22 15:20:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:20:33,938 INFO L225 Difference]: With dead ends: 656 [2022-07-22 15:20:33,938 INFO L226 Difference]: Without dead ends: 469 [2022-07-22 15:20:33,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7738 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8841, Invalid=26315, Unknown=0, NotChecked=0, Total=35156 [2022-07-22 15:20:33,940 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 748 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:20:33,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 1171 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 15:20:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-22 15:20:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 285. [2022-07-22 15:20:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0140845070422535) internal successors, (288), 284 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-07-22 15:20:33,986 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 282 [2022-07-22 15:20:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:20:33,986 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-07-22 15:20:33,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.3098591549295775) internal successors, (470), 142 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-07-22 15:20:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-07-22 15:20:33,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:20:33,988 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:20:34,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-22 15:20:34,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-22 15:20:34,201 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:20:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:20:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1766615371, now seen corresponding path program 54 times [2022-07-22 15:20:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:20:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114375891] [2022-07-22 15:20:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:20:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:20:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:20:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2070 proven. 4142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:35,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:20:35,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114375891] [2022-07-22 15:20:35,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114375891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:20:35,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644728090] [2022-07-22 15:20:35,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:20:35,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:35,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:20:35,118 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:20:35,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-22 15:20:35,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-07-22 15:20:35,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:20:35,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-22 15:20:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:20:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:35,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:20:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:35,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644728090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:20:35,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:20:35,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 53 [2022-07-22 15:20:35,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257580206] [2022-07-22 15:20:35,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:20:35,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 15:20:35,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:20:35,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 15:20:35,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1234, Invalid=1522, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 15:20:35,913 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:20:36,771 INFO L93 Difference]: Finished difference Result 302 states and 306 transitions. [2022-07-22 15:20:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-22 15:20:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 0 states have call successors, (0), 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 284 [2022-07-22 15:20:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:20:36,773 INFO L225 Difference]: With dead ends: 302 [2022-07-22 15:20:36,773 INFO L226 Difference]: Without dead ends: 300 [2022-07-22 15:20:36,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 609 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3782, Invalid=6520, Unknown=0, NotChecked=0, Total=10302 [2022-07-22 15:20:36,774 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 258 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:20:36,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 431 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:20:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-22 15:20:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 293. [2022-07-22 15:20:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0136986301369864) internal successors, (296), 292 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 296 transitions. [2022-07-22 15:20:36,848 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 296 transitions. Word has length 284 [2022-07-22 15:20:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:20:36,849 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 296 transitions. [2022-07-22 15:20:36,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.7924528301886795) internal successors, (307), 53 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 296 transitions. [2022-07-22 15:20:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-07-22 15:20:36,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:20:36,850 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:20:36,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-22 15:20:37,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:37,063 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:20:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:20:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash -890477669, now seen corresponding path program 55 times [2022-07-22 15:20:37,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:20:37,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485083417] [2022-07-22 15:20:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:20:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:20:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:20:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4280 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:39,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:20:39,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485083417] [2022-07-22 15:20:39,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485083417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:20:39,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989582751] [2022-07-22 15:20:39,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:20:39,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:39,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:20:39,431 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:20:39,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-22 15:20:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:20:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-22 15:20:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:20:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:20:42,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:20:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:20:43,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989582751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:20:43,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:20:43,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 146 [2022-07-22 15:20:43,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118606355] [2022-07-22 15:20:43,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:20:43,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-22 15:20:43,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:20:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-22 15:20:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4756, Invalid=16414, Unknown=0, NotChecked=0, Total=21170 [2022-07-22 15:20:43,039 INFO L87 Difference]: Start difference. First operand 293 states and 296 transitions. Second operand has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:20:45,197 INFO L93 Difference]: Finished difference Result 676 states and 774 transitions. [2022-07-22 15:20:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-22 15:20:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 0 states have call successors, (0), 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 292 [2022-07-22 15:20:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:20:45,198 INFO L225 Difference]: With dead ends: 676 [2022-07-22 15:20:45,198 INFO L226 Difference]: Without dead ends: 483 [2022-07-22 15:20:45,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8212 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9270, Invalid=27786, Unknown=0, NotChecked=0, Total=37056 [2022-07-22 15:20:45,201 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 791 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:20:45,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1060 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 15:20:45,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-07-22 15:20:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 295. [2022-07-22 15:20:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0136054421768708) internal successors, (298), 294 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 298 transitions. [2022-07-22 15:20:45,256 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 298 transitions. Word has length 292 [2022-07-22 15:20:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:20:45,256 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 298 transitions. [2022-07-22 15:20:45,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.3424657534246576) internal successors, (488), 146 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:45,256 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 298 transitions. [2022-07-22 15:20:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-22 15:20:45,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:20:45,258 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:20:45,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-22 15:20:45,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:45,463 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:20:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:20:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash -817142336, now seen corresponding path program 56 times [2022-07-22 15:20:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:20:45,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209452259] [2022-07-22 15:20:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:20:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:20:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:20:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4280 proven. 2394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:20:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209452259] [2022-07-22 15:20:47,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209452259] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:20:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115020391] [2022-07-22 15:20:47,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:20:47,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:47,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:20:47,884 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:20:47,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-22 15:20:48,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:20:48,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:20:48,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-22 15:20:48,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:20:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 2256 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:50,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:20:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 2256 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:50,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115020391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:20:50,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:20:50,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 51, 51] total 147 [2022-07-22 15:20:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040173037] [2022-07-22 15:20:50,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:20:50,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-07-22 15:20:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:20:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-07-22 15:20:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3628, Invalid=17834, Unknown=0, NotChecked=0, Total=21462 [2022-07-22 15:20:50,812 INFO L87 Difference]: Start difference. First operand 295 states and 298 transitions. Second operand has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:56,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:20:56,902 INFO L93 Difference]: Finished difference Result 691 states and 792 transitions. [2022-07-22 15:20:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-07-22 15:20:56,902 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 0 states have call successors, (0), 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 294 [2022-07-22 15:20:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:20:56,904 INFO L225 Difference]: With dead ends: 691 [2022-07-22 15:20:56,904 INFO L226 Difference]: Without dead ends: 496 [2022-07-22 15:20:56,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39336 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=18126, Invalid=96456, Unknown=0, NotChecked=0, Total=114582 [2022-07-22 15:20:56,911 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1311 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 1056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 4407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1056 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:20:56,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1311 Valid, 797 Invalid, 4407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1056 Valid, 3351 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 15:20:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-22 15:20:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 301. [2022-07-22 15:20:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0133333333333334) internal successors, (304), 300 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 304 transitions. [2022-07-22 15:20:57,013 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 304 transitions. Word has length 294 [2022-07-22 15:20:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:20:57,014 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 304 transitions. [2022-07-22 15:20:57,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 3.9863945578231292) internal successors, (586), 147 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:20:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 304 transitions. [2022-07-22 15:20:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-07-22 15:20:57,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:20:57,016 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:20:57,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-22 15:20:57,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:57,223 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:20:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:20:57,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1199032792, now seen corresponding path program 57 times [2022-07-22 15:20:57,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:20:57,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283400325] [2022-07-22 15:20:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:20:57,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:20:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:20:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4467 proven. 2493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:20:59,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:20:59,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283400325] [2022-07-22 15:20:59,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283400325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:20:59,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171419190] [2022-07-22 15:20:59,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:20:59,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:20:59,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:20:59,744 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:20:59,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-22 15:20:59,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2022-07-22 15:20:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:20:59,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-22 15:20:59,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:21:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:21:03,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:21:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:21:03,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171419190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:21:03,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:21:03,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 151 [2022-07-22 15:21:03,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145156465] [2022-07-22 15:21:03,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:21:03,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-07-22 15:21:03,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:21:03,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-07-22 15:21:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5103, Invalid=17547, Unknown=0, NotChecked=0, Total=22650 [2022-07-22 15:21:03,622 INFO L87 Difference]: Start difference. First operand 301 states and 304 transitions. Second operand has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:21:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:21:06,179 INFO L93 Difference]: Finished difference Result 698 states and 800 transitions. [2022-07-22 15:21:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-22 15:21:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 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 300 [2022-07-22 15:21:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:21:06,181 INFO L225 Difference]: With dead ends: 698 [2022-07-22 15:21:06,181 INFO L226 Difference]: Without dead ends: 499 [2022-07-22 15:21:06,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8758 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10005, Invalid=29795, Unknown=0, NotChecked=0, Total=39800 [2022-07-22 15:21:06,184 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 845 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:21:06,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 1200 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 15:21:06,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-07-22 15:21:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 303. [2022-07-22 15:21:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.0132450331125828) internal successors, (306), 302 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:21:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 306 transitions. [2022-07-22 15:21:06,223 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 306 transitions. Word has length 300 [2022-07-22 15:21:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:21:06,223 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 306 transitions. [2022-07-22 15:21:06,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:21:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 306 transitions. [2022-07-22 15:21:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-07-22 15:21:06,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:21:06,225 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:21:06,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-22 15:21:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-22 15:21:06,439 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:21:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:21:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1939396349, now seen corresponding path program 58 times [2022-07-22 15:21:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:21:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506737872] [2022-07-22 15:21:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:21:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:21:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:21:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2352 proven. 4706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:21:07,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:21:07,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506737872] [2022-07-22 15:21:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506737872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:21:07,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289620084] [2022-07-22 15:21:07,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:21:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:21:07,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:21:07,449 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:21:07,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-22 15:21:07,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:21:07,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:21:07,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-22 15:21:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:21:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:21:07,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:21:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:21:08,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289620084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:21:08,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:21:08,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 56 [2022-07-22 15:21:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662163865] [2022-07-22 15:21:08,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:21:08,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 15:21:08,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:21:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 15:21:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 15:21:08,182 INFO L87 Difference]: Start difference. First operand 303 states and 306 transitions. Second operand has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:21:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:21:09,141 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2022-07-22 15:21:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-22 15:21:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2022-07-22 15:21:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:21:09,142 INFO L225 Difference]: With dead ends: 320 [2022-07-22 15:21:09,142 INFO L226 Difference]: Without dead ends: 318 [2022-07-22 15:21:09,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 648 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2937 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4247, Invalid=7309, Unknown=0, NotChecked=0, Total=11556 [2022-07-22 15:21:09,144 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 314 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:21:09,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 461 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:21:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-22 15:21:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2022-07-22 15:21:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:21:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 314 transitions. [2022-07-22 15:21:09,181 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 314 transitions. Word has length 302 [2022-07-22 15:21:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:21:09,181 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 314 transitions. [2022-07-22 15:21:09,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:21:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 314 transitions. [2022-07-22 15:21:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-07-22 15:21:09,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:21:09,182 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:21:09,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-22 15:21:09,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-22 15:21:09,383 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:21:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:21:09,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1043276829, now seen corresponding path program 59 times [2022-07-22 15:21:09,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:21:09,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188527631] [2022-07-22 15:21:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:21:09,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:21:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:21:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 4853 proven. 2597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:21:12,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:21:12,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188527631] [2022-07-22 15:21:12,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188527631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:21:12,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643116856] [2022-07-22 15:21:12,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:21:12,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:21:12,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:21:12,016 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:21:12,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-22 15:21:12,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2022-07-22 15:21:12,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:21:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-22 15:21:12,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:21:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:21:15,781 INFO L328 TraceCheckSpWp]: Computing backward predicates...