./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/ex3_forlist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/ldv-regression/ex3_forlist.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 ddbd4e73adf4663f87721f5aa250c32f7b058621a618ab1d03544a940de1ce0e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 19:27:20,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 19:27:20,672 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 19:27:20,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 19:27:20,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 19:27:20,725 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 19:27:20,727 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 19:27:20,727 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 19:27:20,728 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 19:27:20,729 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 19:27:20,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 19:27:20,730 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 19:27:20,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 19:27:20,731 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 19:27:20,732 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 19:27:20,732 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 19:27:20,735 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 19:27:20,736 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 19:27:20,736 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 19:27:20,736 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 19:27:20,736 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 19:27:20,737 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 19:27:20,737 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 19:27:20,737 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 19:27:20,737 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 19:27:20,738 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 19:27:20,738 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 19:27:20,738 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 19:27:20,738 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 19:27:20,738 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 19:27:20,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 19:27:20,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 19:27:20,739 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:27:20,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 19:27:20,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 19:27:20,740 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 19:27:20,740 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 19:27:20,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 19:27:20,741 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 19:27:20,741 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 19:27:20,742 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 19:27:20,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 19:27:20,742 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ddbd4e73adf4663f87721f5aa250c32f7b058621a618ab1d03544a940de1ce0e [2024-11-11 19:27:21,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 19:27:21,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 19:27:21,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 19:27:21,047 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 19:27:21,048 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 19:27:21,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/ex3_forlist.i [2024-11-11 19:27:22,534 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 19:27:22,757 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 19:27:22,758 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/ex3_forlist.i [2024-11-11 19:27:22,771 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45308f237/f11a33224c3b46b197c2fd78063cf2d3/FLAG94af07743 [2024-11-11 19:27:22,787 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45308f237/f11a33224c3b46b197c2fd78063cf2d3 [2024-11-11 19:27:22,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 19:27:22,791 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 19:27:22,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 19:27:22,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 19:27:22,799 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 19:27:22,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:27:22" (1/1) ... [2024-11-11 19:27:22,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3cb5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:22, skipping insertion in model container [2024-11-11 19:27:22,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:27:22" (1/1) ... [2024-11-11 19:27:22,823 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 19:27:22,991 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/ex3_forlist.i[293,306] [2024-11-11 19:27:23,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:27:23,023 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 19:27:23,034 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/ex3_forlist.i[293,306] [2024-11-11 19:27:23,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:27:23,058 INFO L204 MainTranslator]: Completed translation [2024-11-11 19:27:23,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23 WrapperNode [2024-11-11 19:27:23,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 19:27:23,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 19:27:23,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 19:27:23,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 19:27:23,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,089 INFO L138 Inliner]: procedures = 19, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2024-11-11 19:27:23,090 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 19:27:23,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 19:27:23,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 19:27:23,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 19:27:23,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,102 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,119 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 6, 6, 0]. 43 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 2, 2, 0]. The 5 writes are split as follows [0, 2, 3, 0]. [2024-11-11 19:27:23,120 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,120 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,132 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,142 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 19:27:23,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 19:27:23,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 19:27:23,146 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 19:27:23,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (1/1) ... [2024-11-11 19:27:23,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:27:23,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:27:23,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 19:27:23,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 19:27:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-11 19:27:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-11 19:27:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-11 19:27:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-11 19:27:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-11 19:27:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-11 19:27:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-11 19:27:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-11 19:27:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 19:27:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-11 19:27:23,220 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-11 19:27:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure g [2024-11-11 19:27:23,220 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2024-11-11 19:27:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 19:27:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 19:27:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 19:27:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-11 19:27:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure fake_malloc [2024-11-11 19:27:23,221 INFO L138 BoogieDeclarations]: Found implementation of procedure fake_malloc [2024-11-11 19:27:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-11 19:27:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-11 19:27:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-11 19:27:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-11 19:27:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 19:27:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 19:27:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 19:27:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-11 19:27:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 19:27:23,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 19:27:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 19:27:23,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 19:27:23,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 19:27:23,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-11 19:27:23,327 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 19:27:23,329 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 19:27:23,536 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-11 19:27:23,537 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 19:27:23,549 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 19:27:23,549 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-11 19:27:23,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:27:23 BoogieIcfgContainer [2024-11-11 19:27:23,549 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 19:27:23,552 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 19:27:23,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 19:27:23,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 19:27:23,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 07:27:22" (1/3) ... [2024-11-11 19:27:23,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d9a053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:27:23, skipping insertion in model container [2024-11-11 19:27:23,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:27:23" (2/3) ... [2024-11-11 19:27:23,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d9a053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:27:23, skipping insertion in model container [2024-11-11 19:27:23,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:27:23" (3/3) ... [2024-11-11 19:27:23,558 INFO L112 eAbstractionObserver]: Analyzing ICFG ex3_forlist.i [2024-11-11 19:27:23,570 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 19:27:23,570 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 19:27:23,621 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 19:27:23,627 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@706ea700, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 19:27:23,627 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 19:27:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 19:27:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-11 19:27:23,635 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:23,636 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:23,636 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:23,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:23,641 INFO L85 PathProgramCache]: Analyzing trace with hash -431383929, now seen corresponding path program 1 times [2024-11-11 19:27:23,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:23,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158782858] [2024-11-11 19:27:23,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:23,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:23,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 19:27:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:23,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-11 19:27:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:23,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-11 19:27:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:23,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 19:27:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 19:27:23,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:23,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158782858] [2024-11-11 19:27:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158782858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:27:23,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:27:23,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 19:27:23,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308660938] [2024-11-11 19:27:23,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:27:23,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 19:27:23,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:24,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 19:27:24,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 19:27:24,009 INFO L87 Difference]: Start difference. First operand has 38 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 19:27:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:27:24,207 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2024-11-11 19:27:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 19:27:24,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-11-11 19:27:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:27:24,217 INFO L225 Difference]: With dead ends: 82 [2024-11-11 19:27:24,218 INFO L226 Difference]: Without dead ends: 44 [2024-11-11 19:27:24,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:27:24,224 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:27:24,227 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:27:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-11 19:27:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2024-11-11 19:27:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 19:27:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-11 19:27:24,264 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2024-11-11 19:27:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:27:24,265 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-11 19:27:24,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 19:27:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-11 19:27:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-11 19:27:24,267 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:24,267 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:24,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 19:27:24,268 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:24,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:24,269 INFO L85 PathProgramCache]: Analyzing trace with hash -621686623, now seen corresponding path program 1 times [2024-11-11 19:27:24,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:24,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059571978] [2024-11-11 19:27:24,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:24,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-11 19:27:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-11 19:27:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-11 19:27:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 19:27:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 19:27:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059571978] [2024-11-11 19:27:24,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059571978] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:27:24,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:27:24,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 19:27:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597191256] [2024-11-11 19:27:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:27:24,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 19:27:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:24,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 19:27:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:27:24,423 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 19:27:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:27:24,618 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2024-11-11 19:27:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 19:27:24,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-11-11 19:27:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:27:24,621 INFO L225 Difference]: With dead ends: 75 [2024-11-11 19:27:24,621 INFO L226 Difference]: Without dead ends: 46 [2024-11-11 19:27:24,623 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 19:27:24,624 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:27:24,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 40 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:27:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-11 19:27:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2024-11-11 19:27:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 19:27:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-11 19:27:24,637 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2024-11-11 19:27:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:27:24,638 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-11 19:27:24,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 19:27:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-11 19:27:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-11 19:27:24,639 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:24,640 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:24,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 19:27:24,640 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:24,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1110999905, now seen corresponding path program 1 times [2024-11-11 19:27:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:24,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848571789] [2024-11-11 19:27:24,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-11 19:27:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 19:27:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 19:27:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-11 19:27:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 19:27:24,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:24,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848571789] [2024-11-11 19:27:24,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848571789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:27:24,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929004212] [2024-11-11 19:27:24,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:24,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:24,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:27:24,858 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) [2024-11-11 19:27:24,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 19:27:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:24,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-11 19:27:24,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:27:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 19:27:25,006 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 19:27:25,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929004212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:27:25,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 19:27:25,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2024-11-11 19:27:25,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118630222] [2024-11-11 19:27:25,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:27:25,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 19:27:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:25,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 19:27:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-11 19:27:25,011 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 19:27:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:27:25,027 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-11-11 19:27:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 19:27:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-11 19:27:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:27:25,029 INFO L225 Difference]: With dead ends: 56 [2024-11-11 19:27:25,029 INFO L226 Difference]: Without dead ends: 37 [2024-11-11 19:27:25,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-11 19:27:25,031 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:27:25,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 72 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:27:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-11 19:27:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-11 19:27:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 19:27:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-11 19:27:25,038 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2024-11-11 19:27:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:27:25,046 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-11 19:27:25,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 19:27:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-11 19:27:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-11 19:27:25,048 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:25,048 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:25,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 19:27:25,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:25,250 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:25,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:25,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1230450813, now seen corresponding path program 1 times [2024-11-11 19:27:25,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:25,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194397061] [2024-11-11 19:27:25,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:25,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:25,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-11 19:27:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:25,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 19:27:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:25,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 19:27:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:25,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-11 19:27:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 19:27:25,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194397061] [2024-11-11 19:27:25,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194397061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:27:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624969006] [2024-11-11 19:27:25,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:25,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:25,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:27:25,417 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) [2024-11-11 19:27:25,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 19:27:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:25,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-11 19:27:25,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:27:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 19:27:25,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:27:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 19:27:25,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624969006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:27:25,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:27:25,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2024-11-11 19:27:25,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846643042] [2024-11-11 19:27:25,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:27:25,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-11 19:27:25,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-11 19:27:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-11 19:27:25,637 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-11 19:27:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:27:25,811 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2024-11-11 19:27:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 19:27:25,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 35 [2024-11-11 19:27:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:27:25,814 INFO L225 Difference]: With dead ends: 78 [2024-11-11 19:27:25,815 INFO L226 Difference]: Without dead ends: 48 [2024-11-11 19:27:25,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-11 19:27:25,817 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:27:25,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 62 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:27:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-11 19:27:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2024-11-11 19:27:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 19:27:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-11-11 19:27:25,835 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 35 [2024-11-11 19:27:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:27:25,835 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-11-11 19:27:25,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-11 19:27:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-11-11 19:27:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-11 19:27:25,836 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:25,838 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:25,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-11 19:27:26,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-11 19:27:26,039 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:26,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash 828026235, now seen corresponding path program 2 times [2024-11-11 19:27:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:26,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279716595] [2024-11-11 19:27:26,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:26,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 19:27:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:26,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 19:27:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:26,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-11 19:27:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:26,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 19:27:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 19:27:26,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:26,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279716595] [2024-11-11 19:27:26,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279716595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:27:26,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:27:26,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-11 19:27:26,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468730851] [2024-11-11 19:27:26,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:27:26,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 19:27:26,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:26,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 19:27:26,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-11 19:27:26,684 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 19:27:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:27:27,198 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2024-11-11 19:27:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 19:27:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-11-11 19:27:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:27:27,201 INFO L225 Difference]: With dead ends: 90 [2024-11-11 19:27:27,201 INFO L226 Difference]: Without dead ends: 79 [2024-11-11 19:27:27,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2024-11-11 19:27:27,203 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 19:27:27,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 74 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 19:27:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-11 19:27:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2024-11-11 19:27:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 50 states have internal predecessors, (61), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-11 19:27:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2024-11-11 19:27:27,220 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 37 [2024-11-11 19:27:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:27:27,220 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2024-11-11 19:27:27,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 19:27:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2024-11-11 19:27:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-11 19:27:27,222 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:27,222 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:27,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-11 19:27:27,223 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:27,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2143087823, now seen corresponding path program 1 times [2024-11-11 19:27:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:27,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409134328] [2024-11-11 19:27:27,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:27,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 19:27:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:27,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 19:27:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:27,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-11 19:27:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:27,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 19:27:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 19:27:27,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:27,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409134328] [2024-11-11 19:27:27,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409134328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:27:27,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711704673] [2024-11-11 19:27:27,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:27,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:27,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:27:27,849 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) [2024-11-11 19:27:27,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 19:27:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:27,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-11 19:27:27,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:27:28,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-11 19:27:28,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-11 19:27:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 19:27:28,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:27:28,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-11 19:27:28,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-11 19:27:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 19:27:29,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711704673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:27:29,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:27:29,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2024-11-11 19:27:29,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180708512] [2024-11-11 19:27:29,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:27:29,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-11 19:27:29,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-11 19:27:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2024-11-11 19:27:29,013 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 26 states have internal predecessors, (66), 9 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-11 19:27:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:27:29,998 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2024-11-11 19:27:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-11 19:27:29,998 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 26 states have internal predecessors, (66), 9 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 40 [2024-11-11 19:27:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:27:30,000 INFO L225 Difference]: With dead ends: 136 [2024-11-11 19:27:30,000 INFO L226 Difference]: Without dead ends: 105 [2024-11-11 19:27:30,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=2370, Unknown=0, NotChecked=0, Total=2756 [2024-11-11 19:27:30,006 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 438 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-11 19:27:30,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 98 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-11 19:27:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-11 19:27:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 90. [2024-11-11 19:27:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 71 states have internal predecessors, (88), 12 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-11 19:27:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2024-11-11 19:27:30,037 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 40 [2024-11-11 19:27:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:27:30,037 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2024-11-11 19:27:30,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 26 states have internal predecessors, (66), 9 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-11 19:27:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2024-11-11 19:27:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-11 19:27:30,041 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:30,041 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:30,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 19:27:30,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:30,246 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:30,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash -309149075, now seen corresponding path program 1 times [2024-11-11 19:27:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:30,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138245964] [2024-11-11 19:27:30,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:30,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:30,306 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 19:27:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:30,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 19:27:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:30,322 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-11 19:27:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:30,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-11 19:27:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 19:27:30,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:30,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138245964] [2024-11-11 19:27:30,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138245964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:27:30,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063741298] [2024-11-11 19:27:30,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:30,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:30,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:27:30,349 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) [2024-11-11 19:27:30,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 19:27:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:30,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-11 19:27:30,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:27:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 19:27:30,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:27:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 19:27:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063741298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:27:30,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:27:30,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2024-11-11 19:27:30,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668177998] [2024-11-11 19:27:30,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:27:30,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 19:27:30,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 19:27:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-11 19:27:30,497 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-11 19:27:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:27:30,669 INFO L93 Difference]: Finished difference Result 166 states and 214 transitions. [2024-11-11 19:27:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 19:27:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-11-11 19:27:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:27:30,673 INFO L225 Difference]: With dead ends: 166 [2024-11-11 19:27:30,673 INFO L226 Difference]: Without dead ends: 102 [2024-11-11 19:27:30,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-11 19:27:30,677 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:27:30,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 67 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:27:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-11 19:27:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2024-11-11 19:27:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.295774647887324) internal successors, (92), 75 states have internal predecessors, (92), 12 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-11 19:27:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2024-11-11 19:27:30,705 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 41 [2024-11-11 19:27:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:27:30,705 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2024-11-11 19:27:30,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-11 19:27:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2024-11-11 19:27:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 19:27:30,707 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:30,707 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:30,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 19:27:30,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:30,908 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:30,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:30,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1965354537, now seen corresponding path program 1 times [2024-11-11 19:27:30,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:30,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907162503] [2024-11-11 19:27:30,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:30,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:31,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 19:27:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:31,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 19:27:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:31,770 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-11 19:27:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:31,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 19:27:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 19:27:32,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:32,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907162503] [2024-11-11 19:27:32,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907162503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:27:32,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210623868] [2024-11-11 19:27:32,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:32,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:32,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:27:32,109 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) [2024-11-11 19:27:32,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 19:27:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:32,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-11 19:27:32,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:27:32,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-11 19:27:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-11 19:27:32,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:27:33,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-11 19:27:33,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-11 19:27:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 19:27:33,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210623868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:27:33,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:27:33,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 51 [2024-11-11 19:27:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262580539] [2024-11-11 19:27:33,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:27:33,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-11 19:27:33,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-11 19:27:33,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2394, Unknown=0, NotChecked=0, Total=2550 [2024-11-11 19:27:33,292 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 51 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 35 states have internal predecessors, (82), 12 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-11 19:27:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:27:35,808 INFO L93 Difference]: Finished difference Result 236 states and 302 transitions. [2024-11-11 19:27:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-11 19:27:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 35 states have internal predecessors, (82), 12 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 43 [2024-11-11 19:27:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:27:35,811 INFO L225 Difference]: With dead ends: 236 [2024-11-11 19:27:35,811 INFO L226 Difference]: Without dead ends: 186 [2024-11-11 19:27:35,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=709, Invalid=6773, Unknown=0, NotChecked=0, Total=7482 [2024-11-11 19:27:35,814 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 320 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-11 19:27:35,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 201 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-11 19:27:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-11 19:27:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2024-11-11 19:27:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 111 states have (on average 1.2882882882882882) internal successors, (143), 116 states have internal predecessors, (143), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-11 19:27:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2024-11-11 19:27:35,841 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 43 [2024-11-11 19:27:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:27:35,841 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2024-11-11 19:27:35,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 35 states have internal predecessors, (82), 12 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-11 19:27:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2024-11-11 19:27:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 19:27:35,843 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:27:35,843 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:27:35,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 19:27:36,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:36,044 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:27:36,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:27:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1392073365, now seen corresponding path program 2 times [2024-11-11 19:27:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:27:36,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327683347] [2024-11-11 19:27:36,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:27:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:27:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:36,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 19:27:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:36,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-11 19:27:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:36,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-11 19:27:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:36,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 19:27:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:27:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 19:27:37,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:27:37,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327683347] [2024-11-11 19:27:37,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327683347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:27:37,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612054304] [2024-11-11 19:27:37,015 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:27:37,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:27:37,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:27:37,017 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) [2024-11-11 19:27:37,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 19:27:37,145 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:27:37,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:27:37,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-11 19:27:37,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:27:37,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-11 19:27:37,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-11 19:27:37,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 19:27:37,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-11 19:27:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 19:27:37,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:27:38,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-11 19:27:38,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-11 19:27:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-11 19:27:38,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612054304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:27:38,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:27:38,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 10] total 38 [2024-11-11 19:27:38,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098510329] [2024-11-11 19:27:38,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:27:38,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-11 19:27:38,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:27:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-11 19:27:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1271, Unknown=3, NotChecked=0, Total=1406 [2024-11-11 19:27:38,057 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand has 38 states, 36 states have (on average 2.388888888888889) internal successors, (86), 31 states have internal predecessors, (86), 10 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-11 19:27:47,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:27:51,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:27:55,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:00,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:04,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:08,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:16,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:24,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:28,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:32,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:36,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:40,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:44,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:48,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:52,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 19:28:56,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]