./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono6_1.c --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/loops-crafted-1/Mono6_1.c -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 d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:23:52,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:23:52,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:23:52,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:23:52,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:23:52,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:23:52,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:23:52,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:23:52,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:23:53,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:23:53,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:23:53,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:23:53,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:23:53,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:23:53,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:23:53,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:23:53,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:23:53,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:23:53,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:23:53,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:23:53,019 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:23:53,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:23:53,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:23:53,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:23:53,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:23:53,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:23:53,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:23:53,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:23:53,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:23:53,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:23:53,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:23:53,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:23:53,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:23:53,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:23:53,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:23:53,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:23:53,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:23:53,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:23:53,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:23:53,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:23:53,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:23:53,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:23:53,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:23:53,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:23:53,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:23:53,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:23:53,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:23:53,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:23:53,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:23:53,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:23:53,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:23:53,071 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:23:53,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:23:53,073 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:23:53,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:23:53,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:23:53,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:23:53,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:23:53,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:23:53,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:23:53,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:23:53,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:23:53,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:23:53,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:23:53,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:23:53,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:23:53,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:23:53,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:23:53,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:23:53,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:23:53,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:23:53,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:23:53,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:23:53,078 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:23:53,078 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:23:53,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:23:53,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 [2022-07-22 15:23:53,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:23:53,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:23:53,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:23:53,347 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:23:53,347 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:23:53,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2022-07-22 15:23:53,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6d3f00bb/7c2fb1feef8c4faaba77b91b7a50542d/FLAGb010365a9 [2022-07-22 15:23:53,838 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:23:53,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2022-07-22 15:23:53,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6d3f00bb/7c2fb1feef8c4faaba77b91b7a50542d/FLAGb010365a9 [2022-07-22 15:23:54,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6d3f00bb/7c2fb1feef8c4faaba77b91b7a50542d [2022-07-22 15:23:54,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:23:54,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:23:54,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:23:54,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:23:54,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:23:54,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f430ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54, skipping insertion in model container [2022-07-22 15:23:54,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:23:54,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:23:54,404 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/loops-crafted-1/Mono6_1.c[311,324] [2022-07-22 15:23:54,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:23:54,428 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:23:54,440 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/loops-crafted-1/Mono6_1.c[311,324] [2022-07-22 15:23:54,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:23:54,454 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:23:54,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54 WrapperNode [2022-07-22 15:23:54,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:23:54,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:23:54,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:23:54,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:23:54,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,477 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-07-22 15:23:54,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:23:54,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:23:54,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:23:54,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:23:54,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:23:54,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:23:54,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:23:54,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:23:54,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (1/1) ... [2022-07-22 15:23:54,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:23:54,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:54,518 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 15:23:54,531 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 15:23:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:23:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:23:54,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:23:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:23:54,596 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:23:54,597 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:23:54,665 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:23:54,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:23:54,670 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 15:23:54,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:23:54 BoogieIcfgContainer [2022-07-22 15:23:54,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:23:54,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:23:54,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:23:54,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:23:54,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:23:54" (1/3) ... [2022-07-22 15:23:54,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48330c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:23:54, skipping insertion in model container [2022-07-22 15:23:54,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:23:54" (2/3) ... [2022-07-22 15:23:54,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48330c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:23:54, skipping insertion in model container [2022-07-22 15:23:54,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:23:54" (3/3) ... [2022-07-22 15:23:54,678 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2022-07-22 15:23:54,690 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:23:54,691 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:23:54,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:23:54,731 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@6ebd0e59, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2de335c7 [2022-07-22 15:23:54,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:23:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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 15:23:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 15:23:54,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:54,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 15:23:54,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-22 15:23:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:54,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176807131] [2022-07-22 15:23:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:54,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:54,842 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 15:23:54,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:54,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176807131] [2022-07-22 15:23:54,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176807131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:23:54,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:23:54,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:23:54,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65439606] [2022-07-22 15:23:54,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:23:54,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:23:54,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:23:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:23:54,872 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:54,882 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-22 15:23:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:23:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-22 15:23:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:54,889 INFO L225 Difference]: With dead ends: 21 [2022-07-22 15:23:54,889 INFO L226 Difference]: Without dead ends: 9 [2022-07-22 15:23:54,892 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 15:23:54,896 INFO L413 NwaCegarLoop]: 14 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, 14 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 15:23:54,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:23:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-22 15:23:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-22 15:23:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 15:23:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-22 15:23:54,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-22 15:23:54,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:54,923 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-22 15:23:54,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-22 15:23:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 15:23:54,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:54,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 15:23:54,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:23:54,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-22 15:23:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:54,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286189553] [2022-07-22 15:23:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:54,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:55,108 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 15:23:55,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:55,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286189553] [2022-07-22 15:23:55,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286189553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:23:55,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:23:55,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:23:55,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60942833] [2022-07-22 15:23:55,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:23:55,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 15:23:55,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 15:23:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:23:55,127 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:55,149 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-07-22 15:23:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 15:23:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-22 15:23:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:55,151 INFO L225 Difference]: With dead ends: 19 [2022-07-22 15:23:55,151 INFO L226 Difference]: Without dead ends: 12 [2022-07-22 15:23:55,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:23:55,152 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:55,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:23:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-22 15:23:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-07-22 15:23:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-22 15:23:55,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-07-22 15:23:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:55,157 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-22 15:23:55,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-22 15:23:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 15:23:55,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:55,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:55,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:23:55,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2022-07-22 15:23:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:55,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555406159] [2022-07-22 15:23:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555406159] [2022-07-22 15:23:55,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555406159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:23:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360183422] [2022-07-22 15:23:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:55,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:55,333 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 15:23:55,345 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 15:23:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 15:23:55,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:23:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:55,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:23:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:55,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360183422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:23:55,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:23:55,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-07-22 15:23:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448539041] [2022-07-22 15:23:55,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:23:55,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:23:55,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:23:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:23:55,502 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 15:23:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:55,674 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-07-22 15:23:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 15:23:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) Word has length 9 [2022-07-22 15:23:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:55,676 INFO L225 Difference]: With dead ends: 33 [2022-07-22 15:23:55,676 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 15:23:55,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:23:55,678 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:55,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 16 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:23:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 15:23:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-07-22 15:23:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-22 15:23:55,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2022-07-22 15:23:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:55,683 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-22 15:23:55,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 15:23:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-22 15:23:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 15:23:55,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:55,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:55,715 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 15:23:55,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:55,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2022-07-22 15:23:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:55,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576270331] [2022-07-22 15:23:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:55,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:56,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:56,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576270331] [2022-07-22 15:23:56,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576270331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:23:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486022009] [2022-07-22 15:23:56,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:23:56,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:56,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:56,096 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 15:23:56,106 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 15:23:56,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 15:23:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:23:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 15:23:56,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:23:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 15:23:56,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:23:56,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486022009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:23:56,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:23:56,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-07-22 15:23:56,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892219582] [2022-07-22 15:23:56,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:23:56,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:23:56,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:23:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:23:56,239 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:56,279 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-22 15:23:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:23:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-22 15:23:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:56,281 INFO L225 Difference]: With dead ends: 30 [2022-07-22 15:23:56,281 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 15:23:56,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 15:23:56,283 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:56,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:23:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 15:23:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-22 15:23:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-22 15:23:56,288 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2022-07-22 15:23:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:56,288 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-22 15:23:56,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-22 15:23:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 15:23:56,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:56,290 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:56,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 15:23:56,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 15:23:56,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:56,501 INFO L85 PathProgramCache]: Analyzing trace with hash 491841168, now seen corresponding path program 1 times [2022-07-22 15:23:56,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:56,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646322671] [2022-07-22 15:23:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:56,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:23:56,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:56,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646322671] [2022-07-22 15:23:56,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646322671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:23:56,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052687739] [2022-07-22 15:23:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:56,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:56,589 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 15:23:56,590 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 15:23:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 15:23:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:23:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:23:56,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:23:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:56,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052687739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:23:56,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:23:56,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 9] total 14 [2022-07-22 15:23:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919268547] [2022-07-22 15:23:56,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:23:56,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:23:56,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:23:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:23:56,943 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 15:23:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:23:58,366 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-07-22 15:23:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 15:23:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) Word has length 18 [2022-07-22 15:23:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:23:58,367 INFO L225 Difference]: With dead ends: 53 [2022-07-22 15:23:58,367 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 15:23:58,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2022-07-22 15:23:58,368 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:23:58,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 25 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:23:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 15:23:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-07-22 15:23:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:23:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-07-22 15:23:58,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 18 [2022-07-22 15:23:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:23:58,376 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-07-22 15:23:58,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 15:23:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-07-22 15:23:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 15:23:58,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:23:58,377 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:23:58,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 15:23:58,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:58,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:23:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:23:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -191017413, now seen corresponding path program 2 times [2022-07-22 15:23:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:23:58,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121301725] [2022-07-22 15:23:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:23:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:23:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:23:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:58,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:23:58,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121301725] [2022-07-22 15:23:58,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121301725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:23:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637547675] [2022-07-22 15:23:58,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:23:58,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:23:58,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:23:58,720 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 15:23:58,752 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 15:23:58,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:23:58,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:23:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 15:23:58,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:23:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:23:58,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:23:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:23:59,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637547675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:23:59,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:23:59,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 20 [2022-07-22 15:23:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707488564] [2022-07-22 15:23:59,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:23:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 15:23:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:23:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 15:23:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-07-22 15:23:59,073 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 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 15:24:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:24:03,072 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2022-07-22 15:24:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 15:24:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 15:24:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:24:03,074 INFO L225 Difference]: With dead ends: 109 [2022-07-22 15:24:03,074 INFO L226 Difference]: Without dead ends: 86 [2022-07-22 15:24:03,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2022-07-22 15:24:03,076 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:24:03,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 31 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 15:24:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-22 15:24:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-07-22 15:24:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 78 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:24:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-07-22 15:24:03,094 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 21 [2022-07-22 15:24:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:24:03,094 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-07-22 15:24:03,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 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 15:24:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-07-22 15:24:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 15:24:03,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:24:03,096 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:24:03,126 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 15:24:03,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:24:03,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:24:03,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:24:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1942413364, now seen corresponding path program 3 times [2022-07-22 15:24:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:24:03,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649671747] [2022-07-22 15:24:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:24:03,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:24:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:24:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 79 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 15:24:03,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:24:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649671747] [2022-07-22 15:24:03,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649671747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:24:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395847287] [2022-07-22 15:24:03,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:24:03,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:24:03,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:24:03,455 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 15:24:03,483 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 15:24:03,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 15:24:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:24:03,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 15:24:03,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:24:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 15:24:03,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:24:03,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395847287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:24:03,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:24:03,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-07-22 15:24:03,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002039225] [2022-07-22 15:24:03,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:24:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:24:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:24:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:24:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:24:03,594 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 15:24:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:24:03,646 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-07-22 15:24:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:24:03,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 36 [2022-07-22 15:24:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:24:03,647 INFO L225 Difference]: With dead ends: 103 [2022-07-22 15:24:03,647 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 15:24:03,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-22 15:24:03,648 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:24:03,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:24:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 15:24:03,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2022-07-22 15:24:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:24:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-07-22 15:24:03,659 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 36 [2022-07-22 15:24:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:24:03,660 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-07-22 15:24:03,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 15:24:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-07-22 15:24:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 15:24:03,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:24:03,661 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:24:03,684 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 15:24:03,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:24:03,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:24:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:24:03,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1991122341, now seen corresponding path program 4 times [2022-07-22 15:24:03,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:24:03,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352386092] [2022-07-22 15:24:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:24:03,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:24:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:24:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:24:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:24:04,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352386092] [2022-07-22 15:24:04,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352386092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:24:04,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146615438] [2022-07-22 15:24:04,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:24:04,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:24:04,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:24:04,080 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 15:24:04,086 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 15:24:04,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:24:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:24:04,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 15:24:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:24:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:24:04,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:24:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:24:04,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146615438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:24:04,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:24:04,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 38 [2022-07-22 15:24:04,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099979833] [2022-07-22 15:24:04,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:24:04,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 15:24:04,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:24:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 15:24:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 15:24:04,894 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:24:07,104 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296))) (and (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 5) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 9) 4294967296) .cse0)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) .cse0)) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 3) 4294967296))) (not (= .cse0 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296))) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296))) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296))))) is different from false [2022-07-22 15:24:09,110 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296))) (and (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 5) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 9) 4294967296) .cse0)) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 3) 4294967296))) (not (= .cse0 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (not (= (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) .cse0)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296))) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296))) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296))))) is different from false [2022-07-22 15:24:42,505 WARN L233 SmtUtils]: Spent 13.45s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:24:45,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:24:47,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:24:49,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:24:50,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:24:52,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:24:54,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:24:56,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:24:58,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:00,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:02,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:04,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:06,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:09,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:11,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:13,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:46,084 WARN L233 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:25:48,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:50,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:52,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:53,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:55,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:25:58,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:26:00,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:26:02,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:26:04,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:26:31,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:26:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:26:33,856 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2022-07-22 15:26:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 15:26:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 15:26:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:26:33,857 INFO L225 Difference]: With dead ends: 136 [2022-07-22 15:26:33,857 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 15:26:33,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 95.8s TimeCoverageRelationStatistics Valid=550, Invalid=2106, Unknown=4, NotChecked=202, Total=2862 [2022-07-22 15:26:33,859 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 36 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 53.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:26:33,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 70 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 665 Invalid, 21 Unknown, 4 Unchecked, 53.7s Time] [2022-07-22 15:26:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 15:26:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2022-07-22 15:26:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 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 15:26:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-07-22 15:26:33,869 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 39 [2022-07-22 15:26:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:26:33,869 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-07-22 15:26:33,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:26:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-07-22 15:26:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 15:26:33,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:26:33,871 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 15:26:33,892 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 15:26:34,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:26:34,072 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:26:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:26:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash -83499594, now seen corresponding path program 5 times [2022-07-22 15:26:34,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:26:34,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72804358] [2022-07-22 15:26:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:26:34,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:26:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:26:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 93 proven. 187 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 15:26:34,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:26:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72804358] [2022-07-22 15:26:34,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72804358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:26:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563349390] [2022-07-22 15:26:34,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:26:34,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:26:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:26:34,249 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 15:26:34,250 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 15:26:34,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-22 15:26:34,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:26:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:26:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:26:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-22 15:26:35,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:26:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-07-22 15:26:35,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563349390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:26:35,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:26:35,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2022-07-22 15:26:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547564038] [2022-07-22 15:26:35,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:26:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 15:26:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:26:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 15:26:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:26:35,162 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 15:26:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:26:35,464 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2022-07-22 15:26:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 15:26:35,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 48 [2022-07-22 15:26:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:26:35,465 INFO L225 Difference]: With dead ends: 105 [2022-07-22 15:26:35,465 INFO L226 Difference]: Without dead ends: 78 [2022-07-22 15:26:35,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-07-22 15:26:35,466 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:26:35,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 29 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:26:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-22 15:26:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-07-22 15:26:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:26:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-22 15:26:35,477 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 48 [2022-07-22 15:26:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:26:35,477 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-22 15:26:35,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 15:26:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-22 15:26:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 15:26:35,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:26:35,479 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:26:35,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 15:26:35,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:26:35,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:26:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:26:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash -724913509, now seen corresponding path program 6 times [2022-07-22 15:26:35,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:26:35,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751282228] [2022-07-22 15:26:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:26:35,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:26:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:26:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:26:36,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:26:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751282228] [2022-07-22 15:26:36,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751282228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:26:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155034258] [2022-07-22 15:26:36,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:26:36,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:26:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:26:36,116 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 15:26:36,121 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 15:26:36,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 15:26:36,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:26:36,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 15:26:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:26:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-07-22 15:26:36,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:26:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-07-22 15:26:36,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155034258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:26:36,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:26:36,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2022-07-22 15:26:36,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314455822] [2022-07-22 15:26:36,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:26:36,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 15:26:36,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:26:36,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 15:26:36,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-07-22 15:26:36,787 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:26:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:26:38,487 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2022-07-22 15:26:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 15:26:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 15:26:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:26:38,489 INFO L225 Difference]: With dead ends: 105 [2022-07-22 15:26:38,489 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 15:26:38,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=451, Invalid=3455, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 15:26:38,490 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 141 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:26:38,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 33 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1738 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 15:26:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 15:26:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-07-22 15:26:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 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 15:26:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-07-22 15:26:38,500 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 75 [2022-07-22 15:26:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:26:38,501 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-07-22 15:26:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:26:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-07-22 15:26:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 15:26:38,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:26:38,502 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 23, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 15:26:38,523 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 15:26:38,719 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,SelfDestructingSolverStorable9 [2022-07-22 15:26:38,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:26:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:26:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash 220270617, now seen corresponding path program 7 times [2022-07-22 15:26:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:26:38,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021645015] [2022-07-22 15:26:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:26:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:26:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:26:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 260 proven. 805 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:26:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:26:39,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021645015] [2022-07-22 15:26:39,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021645015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:26:39,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910511467] [2022-07-22 15:26:39,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:26:39,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:26:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:26:39,106 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 15:26:39,106 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 15:26:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:26:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 15:26:39,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:26:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 128 proven. 950 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:26:39,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:26:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 128 proven. 950 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 15:26:41,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910511467] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:26:41,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:26:41,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 29] total 56 [2022-07-22 15:26:41,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808639491] [2022-07-22 15:26:41,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:26:41,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 15:26:41,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:26:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 15:26:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 15:26:41,030 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 56 states, 56 states have (on average 2.982142857142857) internal successors, (167), 56 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)