./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/nested3-1.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 ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:53:00,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:53:00,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:53:00,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:53:00,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:53:00,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:53:00,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:53:00,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:53:00,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:53:00,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:53:00,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:53:00,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:53:00,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:53:00,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:53:00,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:53:00,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:53:00,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:53:00,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:53:00,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:53:00,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:53:00,173 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:53:00,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:53:00,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:53:00,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:53:00,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:53:00,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:53:00,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:53:00,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:53:00,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:53:00,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:53:00,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:53:00,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:53:00,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:53:00,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:53:00,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:53:00,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:53:00,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:53:00,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:53:00,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:53:00,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:53:00,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:53:00,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:53:00,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:53:00,232 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:53:00,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:53:00,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:53:00,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:53:00,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:53:00,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:53:00,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:53:00,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:53:00,235 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:53:00,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:53:00,236 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:53:00,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:53:00,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:53:00,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:53:00,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:53:00,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:53:00,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:53:00,237 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:53:00,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:53:00,237 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:53:00,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:53:00,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:53:00,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:53:00,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:53:00,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:53:00,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:53:00,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:53:00,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:53:00,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:53:00,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:53:00,239 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:53:00,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:53:00,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:53:00,239 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e [2022-07-21 02:53:00,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:53:00,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:53:00,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:53:00,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:53:00,505 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:53:00,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2022-07-21 02:53:00,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf13e2780/2681ee88bf7d4608acdbeffcb65f6dd1/FLAG7998c046f [2022-07-21 02:53:00,908 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:53:00,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2022-07-21 02:53:00,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf13e2780/2681ee88bf7d4608acdbeffcb65f6dd1/FLAG7998c046f [2022-07-21 02:53:01,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf13e2780/2681ee88bf7d4608acdbeffcb65f6dd1 [2022-07-21 02:53:01,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:53:01,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:53:01,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:53:01,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:53:01,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:53:01,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35431c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01, skipping insertion in model container [2022-07-21 02:53:01,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:53:01,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:53:01,463 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/nested3-1.c[321,334] [2022-07-21 02:53:01,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:53:01,477 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:53:01,485 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/nested3-1.c[321,334] [2022-07-21 02:53:01,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:53:01,533 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:53:01,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01 WrapperNode [2022-07-21 02:53:01,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:53:01,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:53:01,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:53:01,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:53:01,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,559 INFO L137 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-07-21 02:53:01,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:53:01,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:53:01,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:53:01,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:53:01,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:53:01,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:53:01,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:53:01,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:53:01,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (1/1) ... [2022-07-21 02:53:01,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:53:01,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:01,596 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) [2022-07-21 02:53:01,598 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 [2022-07-21 02:53:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:53:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:53:01,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:53:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:53:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 02:53:01,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 02:53:01,677 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:53:01,678 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:53:01,796 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:53:01,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:53:01,800 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 02:53:01,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:53:01 BoogieIcfgContainer [2022-07-21 02:53:01,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:53:01,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:53:01,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:53:01,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:53:01,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:53:01" (1/3) ... [2022-07-21 02:53:01,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3ba24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:53:01, skipping insertion in model container [2022-07-21 02:53:01,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:53:01" (2/3) ... [2022-07-21 02:53:01,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3ba24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:53:01, skipping insertion in model container [2022-07-21 02:53:01,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:53:01" (3/3) ... [2022-07-21 02:53:01,817 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2022-07-21 02:53:01,829 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:53:01,830 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:53:01,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:53:01,882 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@748cfc25, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@53990bb4 [2022-07-21 02:53:01,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:53:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 02:53:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:53:01,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:01,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:01,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1839857593, now seen corresponding path program 1 times [2022-07-21 02:53:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:01,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108471628] [2022-07-21 02:53:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:01,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:01,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:01,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108471628] [2022-07-21 02:53:01,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108471628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:53:01,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:53:01,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:53:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139329318] [2022-07-21 02:53:01,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:53:01,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:53:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:53:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:53:02,022 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:02,036 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2022-07-21 02:53:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:53:02,038 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 02:53:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:02,043 INFO L225 Difference]: With dead ends: 38 [2022-07-21 02:53:02,043 INFO L226 Difference]: Without dead ends: 16 [2022-07-21 02:53:02,048 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 [2022-07-21 02:53:02,051 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-07-21 02:53:02,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:53:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-21 02:53:02,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-21 02:53:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:53:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-07-21 02:53:02,079 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2022-07-21 02:53:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:02,079 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-07-21 02:53:02,080 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-07-21 02:53:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:53:02,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:02,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:02,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:53:02,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:02,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1810304921, now seen corresponding path program 1 times [2022-07-21 02:53:02,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:02,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270860894] [2022-07-21 02:53:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:02,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:02,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270860894] [2022-07-21 02:53:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270860894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:53:02,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:53:02,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:53:02,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010796489] [2022-07-21 02:53:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:53:02,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:53:02,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:53:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:53:02,198 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:02,209 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-07-21 02:53:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:53:02,210 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 02:53:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:02,210 INFO L225 Difference]: With dead ends: 30 [2022-07-21 02:53:02,210 INFO L226 Difference]: Without dead ends: 23 [2022-07-21 02:53:02,211 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 [2022-07-21 02:53:02,212 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:02,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:53:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-21 02:53:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2022-07-21 02:53:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:53:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-07-21 02:53:02,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2022-07-21 02:53:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:02,216 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-07-21 02:53:02,217 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-07-21 02:53:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 02:53:02,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:02,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:02,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:53:02,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash 300961951, now seen corresponding path program 1 times [2022-07-21 02:53:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:02,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350417006] [2022-07-21 02:53:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:02,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:02,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:02,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350417006] [2022-07-21 02:53:02,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350417006] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:53:02,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:53:02,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:53:02,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875470431] [2022-07-21 02:53:02,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:53:02,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:53:02,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:53:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:53:02,248 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:02,274 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-07-21 02:53:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:53:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 02:53:02,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:02,275 INFO L225 Difference]: With dead ends: 35 [2022-07-21 02:53:02,275 INFO L226 Difference]: Without dead ends: 21 [2022-07-21 02:53:02,276 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 [2022-07-21 02:53:02,276 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:02,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:53:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-21 02:53:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-07-21 02:53:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:53:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-07-21 02:53:02,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2022-07-21 02:53:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:02,281 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-07-21 02:53:02,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-07-21 02:53:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 02:53:02,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:02,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:02,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 02:53:02,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:02,282 INFO L85 PathProgramCache]: Analyzing trace with hash 766069286, now seen corresponding path program 1 times [2022-07-21 02:53:02,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:02,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566346625] [2022-07-21 02:53:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566346625] [2022-07-21 02:53:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566346625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:53:02,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:53:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:53:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711860974] [2022-07-21 02:53:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:53:02,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:53:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:53:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:53:02,339 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:02,354 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-07-21 02:53:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:53:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 02:53:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:02,362 INFO L225 Difference]: With dead ends: 35 [2022-07-21 02:53:02,362 INFO L226 Difference]: Without dead ends: 20 [2022-07-21 02:53:02,363 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 [2022-07-21 02:53:02,364 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:02,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:53:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-21 02:53:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-07-21 02:53:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:53:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-21 02:53:02,374 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-07-21 02:53:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:02,374 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-21 02:53:02,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-21 02:53:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 02:53:02,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:02,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:02,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 02:53:02,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1993625471, now seen corresponding path program 1 times [2022-07-21 02:53:02,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:02,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874972251] [2022-07-21 02:53:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:02,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:02,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874972251] [2022-07-21 02:53:02,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874972251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:53:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121512390] [2022-07-21 02:53:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:02,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:02,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:02,456 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) [2022-07-21 02:53:02,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:53:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 02:53:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:53:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:02,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:53:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:02,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121512390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:53:02,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:53:02,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-21 02:53:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196293015] [2022-07-21 02:53:02,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:53:02,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:53:02,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:53:02,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:53:02,561 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:02,602 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-07-21 02:53:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:53:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 02:53:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:02,606 INFO L225 Difference]: With dead ends: 39 [2022-07-21 02:53:02,606 INFO L226 Difference]: Without dead ends: 23 [2022-07-21 02:53:02,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:53:02,609 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:02,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 65 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:53:02,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-21 02:53:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-21 02:53:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:53:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-21 02:53:02,620 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2022-07-21 02:53:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:02,621 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-21 02:53:02,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-21 02:53:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 02:53:02,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:02,622 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:02,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:53:02,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:02,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash 775784678, now seen corresponding path program 2 times [2022-07-21 02:53:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:02,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072664417] [2022-07-21 02:53:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:02,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:02,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:02,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072664417] [2022-07-21 02:53:02,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072664417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:53:02,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551889122] [2022-07-21 02:53:02,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:53:02,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:02,944 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) [2022-07-21 02:53:02,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:53:02,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:53:02,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:53:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 02:53:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:53:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:03,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:53:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:03,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551889122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:53:03,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:53:03,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-21 02:53:03,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346390495] [2022-07-21 02:53:03,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:53:03,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 02:53:03,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 02:53:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-07-21 02:53:03,069 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:03,299 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2022-07-21 02:53:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 02:53:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 02:53:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:03,300 INFO L225 Difference]: With dead ends: 48 [2022-07-21 02:53:03,300 INFO L226 Difference]: Without dead ends: 29 [2022-07-21 02:53:03,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:53:03,301 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:03,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 98 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:53:03,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-21 02:53:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-21 02:53:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:53:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-21 02:53:03,305 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2022-07-21 02:53:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:03,305 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-21 02:53:03,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-21 02:53:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 02:53:03,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:03,306 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:03,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:53:03,525 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,SelfDestructingSolverStorable5 [2022-07-21 02:53:03,525 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:03,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2064634630, now seen corresponding path program 3 times [2022-07-21 02:53:03,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:03,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306539517] [2022-07-21 02:53:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:03,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306539517] [2022-07-21 02:53:03,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306539517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:53:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895889920] [2022-07-21 02:53:03,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:53:03,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:03,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:03,696 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) [2022-07-21 02:53:03,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:53:03,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 02:53:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:53:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 02:53:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:53:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 02:53:03,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:53:03,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895889920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:53:03,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:53:03,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2022-07-21 02:53:03,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34238890] [2022-07-21 02:53:03,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:53:03,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 02:53:03,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 02:53:03,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:53:03,930 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:03,944 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-07-21 02:53:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:53:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 02:53:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:03,945 INFO L225 Difference]: With dead ends: 33 [2022-07-21 02:53:03,945 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 02:53:03,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-07-21 02:53:03,946 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:03,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-07-21 02:53:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 02:53:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-07-21 02:53:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 02:53:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-21 02:53:03,951 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2022-07-21 02:53:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:03,951 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-21 02:53:03,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:53:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-21 02:53:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 02:53:03,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:03,952 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:03,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:53:04,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:04,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1529129531, now seen corresponding path program 1 times [2022-07-21 02:53:04,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:04,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337307661] [2022-07-21 02:53:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:04,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:04,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 02:53:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:53:04,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337307661] [2022-07-21 02:53:04,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337307661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:53:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643386625] [2022-07-21 02:53:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:04,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:04,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:04,323 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) [2022-07-21 02:53:04,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:53:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 02:53:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:53:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 02:53:04,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:53:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 02:53:04,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643386625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:53:04,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:53:04,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2022-07-21 02:53:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792658358] [2022-07-21 02:53:04,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:53:04,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 02:53:04,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 02:53:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-21 02:53:04,556 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 02:53:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:05,320 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2022-07-21 02:53:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 02:53:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-07-21 02:53:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:05,324 INFO L225 Difference]: With dead ends: 104 [2022-07-21 02:53:05,324 INFO L226 Difference]: Without dead ends: 77 [2022-07-21 02:53:05,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 02:53:05,326 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:05,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 96 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:53:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-21 02:53:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-07-21 02:53:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 02:53:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-07-21 02:53:05,337 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 26 [2022-07-21 02:53:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:05,337 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-07-21 02:53:05,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 02:53:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-07-21 02:53:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 02:53:05,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:05,338 INFO L195 NwaCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:05,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 02:53:05,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:05,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:05,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:05,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1271803231, now seen corresponding path program 2 times [2022-07-21 02:53:05,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:05,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367998075] [2022-07-21 02:53:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:05,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 02:53:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:05,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 02:53:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:05,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 02:53:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:05,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 02:53:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-21 02:53:05,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:05,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367998075] [2022-07-21 02:53:05,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367998075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:53:05,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126956922] [2022-07-21 02:53:05,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:53:05,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:05,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:05,788 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) [2022-07-21 02:53:05,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:53:05,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:53:05,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:53:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 02:53:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:53:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-21 02:53:06,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:53:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-21 02:53:06,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126956922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:53:06,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:53:06,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2022-07-21 02:53:06,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237917424] [2022-07-21 02:53:06,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:53:06,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 02:53:06,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:06,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 02:53:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 02:53:06,375 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 02:53:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:12,587 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2022-07-21 02:53:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-07-21 02:53:12,587 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 84 [2022-07-21 02:53:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:12,588 INFO L225 Difference]: With dead ends: 250 [2022-07-21 02:53:12,588 INFO L226 Difference]: Without dead ends: 177 [2022-07-21 02:53:12,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8825 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2022-07-21 02:53:12,595 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 68 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:12,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 411 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 02:53:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-21 02:53:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-07-21 02:53:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 162 states have (on average 1.0802469135802468) internal successors, (175), 162 states have internal predecessors, (175), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 02:53:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 198 transitions. [2022-07-21 02:53:12,637 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 198 transitions. Word has length 84 [2022-07-21 02:53:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:12,638 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 198 transitions. [2022-07-21 02:53:12,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 02:53:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 198 transitions. [2022-07-21 02:53:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-21 02:53:12,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:12,644 INFO L195 NwaCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:12,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 02:53:12,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:12,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1147001079, now seen corresponding path program 3 times [2022-07-21 02:53:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:12,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491199768] [2022-07-21 02:53:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:12,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 02:53:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 02:53:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 02:53:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 02:53:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-21 02:53:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-21 02:53:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-21 02:53:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-07-21 02:53:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-07-21 02:53:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-07-21 02:53:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2022-07-21 02:53:13,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:13,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491199768] [2022-07-21 02:53:13,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491199768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:53:13,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689266136] [2022-07-21 02:53:13,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:53:13,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:13,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:13,161 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) [2022-07-21 02:53:13,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:53:13,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-21 02:53:13,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:53:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 02:53:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:53:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 78 refuted. 0 times theorem prover too weak. 7056 trivial. 0 not checked. [2022-07-21 02:53:13,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:53:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 63 refuted. 0 times theorem prover too weak. 7071 trivial. 0 not checked. [2022-07-21 02:53:13,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689266136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:53:13,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:53:13,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 8] total 23 [2022-07-21 02:53:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374062088] [2022-07-21 02:53:13,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:53:13,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 02:53:13,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 02:53:13,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-21 02:53:13,664 INFO L87 Difference]: Start difference. First operand 176 states and 198 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 02:53:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:13,869 INFO L93 Difference]: Finished difference Result 472 states and 592 transitions. [2022-07-21 02:53:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 02:53:13,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 208 [2022-07-21 02:53:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:13,872 INFO L225 Difference]: With dead ends: 472 [2022-07-21 02:53:13,872 INFO L226 Difference]: Without dead ends: 287 [2022-07-21 02:53:13,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 427 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-07-21 02:53:13,873 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:13,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 276 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 02:53:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-21 02:53:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 206. [2022-07-21 02:53:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 192 states have (on average 1.171875) internal successors, (225), 192 states have internal predecessors, (225), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 02:53:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 248 transitions. [2022-07-21 02:53:13,896 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 248 transitions. Word has length 208 [2022-07-21 02:53:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:13,896 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 248 transitions. [2022-07-21 02:53:13,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 02:53:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 248 transitions. [2022-07-21 02:53:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-21 02:53:13,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:13,898 INFO L195 NwaCegarLoop]: trace histogram [130, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:13,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 02:53:14,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:14,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1425089983, now seen corresponding path program 4 times [2022-07-21 02:53:14,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093183349] [2022-07-21 02:53:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 02:53:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 02:53:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-21 02:53:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-21 02:53:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-21 02:53:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-21 02:53:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-21 02:53:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-07-21 02:53:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-07-21 02:53:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-21 02:53:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1794 proven. 91 refuted. 0 times theorem prover too weak. 8190 trivial. 0 not checked. [2022-07-21 02:53:14,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093183349] [2022-07-21 02:53:14,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093183349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:53:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702186305] [2022-07-21 02:53:14,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:53:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:14,328 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) [2022-07-21 02:53:14,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 02:53:14,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:53:14,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:53:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 02:53:14,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:53:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 5866 proven. 91 refuted. 0 times theorem prover too weak. 4118 trivial. 0 not checked. [2022-07-21 02:53:14,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:53:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 5782 proven. 91 refuted. 0 times theorem prover too weak. 4202 trivial. 0 not checked. [2022-07-21 02:53:14,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702186305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:53:14,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:53:14,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-07-21 02:53:14,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179081401] [2022-07-21 02:53:14,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:53:14,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 02:53:14,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:53:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 02:53:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2022-07-21 02:53:14,847 INFO L87 Difference]: Start difference. First operand 206 states and 248 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 02:53:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:53:25,791 INFO L93 Difference]: Finished difference Result 570 states and 774 transitions. [2022-07-21 02:53:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 02:53:25,791 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 218 [2022-07-21 02:53:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:53:25,792 INFO L225 Difference]: With dead ends: 570 [2022-07-21 02:53:25,793 INFO L226 Difference]: Without dead ends: 367 [2022-07-21 02:53:25,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 441 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=686, Invalid=1206, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 02:53:25,794 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:53:25,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 242 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:53:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-21 02:53:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 366. [2022-07-21 02:53:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 352 states have (on average 1.09375) internal successors, (385), 352 states have internal predecessors, (385), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 02:53:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 408 transitions. [2022-07-21 02:53:25,822 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 408 transitions. Word has length 218 [2022-07-21 02:53:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:53:25,822 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 408 transitions. [2022-07-21 02:53:25,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 02:53:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 408 transitions. [2022-07-21 02:53:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-07-21 02:53:25,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:53:25,825 INFO L195 NwaCegarLoop]: trace histogram [290, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:53:25,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 02:53:26,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:26,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:53:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:53:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2057039807, now seen corresponding path program 5 times [2022-07-21 02:53:26,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:53:26,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876072678] [2022-07-21 02:53:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:53:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:53:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-21 02:53:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 02:53:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-21 02:53:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-21 02:53:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-07-21 02:53:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-07-21 02:53:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2022-07-21 02:53:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2022-07-21 02:53:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2022-07-21 02:53:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 367 [2022-07-21 02:53:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:53:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45195 backedges. 8130 proven. 435 refuted. 0 times theorem prover too weak. 36630 trivial. 0 not checked. [2022-07-21 02:53:26,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:53:26,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876072678] [2022-07-21 02:53:26,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876072678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:53:26,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112766323] [2022-07-21 02:53:26,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:53:26,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:53:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:53:26,752 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) [2022-07-21 02:53:26,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process