./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/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/recursified_nla-digbench/recursified_prod4br-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 02:16:00,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 02:16:00,805 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 02:16:00,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 02:16:00,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 02:16:00,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 02:16:00,833 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 02:16:00,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 02:16:00,834 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 02:16:00,834 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 02:16:00,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 02:16:00,835 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 02:16:00,836 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 02:16:00,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 02:16:00,837 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 02:16:00,838 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 02:16:00,838 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 02:16:00,838 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 02:16:00,838 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 02:16:00,840 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 02:16:00,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 02:16:00,840 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 02:16:00,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 02:16:00,841 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 02:16:00,841 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 02:16:00,841 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 02:16:00,841 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 02:16:00,841 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 02:16:00,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 02:16:00,842 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 02:16:00,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 02:16:00,842 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 02:16:00,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:16:00,842 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 02:16:00,842 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 02:16:00,842 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 02:16:00,843 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 02:16:00,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 02:16:00,843 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 02:16:00,843 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 02:16:00,843 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 02:16:00,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 02:16:00,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b [2024-11-22 02:16:01,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 02:16:01,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 02:16:01,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 02:16:01,132 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 02:16:01,132 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 02:16:01,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-11-22 02:16:02,411 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 02:16:02,628 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 02:16:02,628 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2024-11-22 02:16:02,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3361a57c/7672f4a87b9e418d879b267e39ffe7e4/FLAG00f59de68 [2024-11-22 02:16:02,990 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3361a57c/7672f4a87b9e418d879b267e39ffe7e4 [2024-11-22 02:16:02,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 02:16:02,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 02:16:02,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 02:16:02,995 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 02:16:03,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 02:16:03,001 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32dabb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03, skipping insertion in model container [2024-11-22 02:16:03,002 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,030 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 02:16:03,181 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/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2024-11-22 02:16:03,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:16:03,221 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 02:16:03,231 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/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2024-11-22 02:16:03,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:16:03,263 INFO L204 MainTranslator]: Completed translation [2024-11-22 02:16:03,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03 WrapperNode [2024-11-22 02:16:03,264 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 02:16:03,265 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 02:16:03,266 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 02:16:03,266 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 02:16:03,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,306 INFO L138 Inliner]: procedures = 16, calls = 86, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2024-11-22 02:16:03,308 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 02:16:03,309 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 02:16:03,309 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 02:16:03,309 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 02:16:03,318 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,326 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,342 INFO L175 MemorySlicer]: Split 57 memory accesses to 7 slices as follows [2, 7, 9, 15, 15, 4, 5]. 26 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 16 writes are split as follows [0, 2, 4, 4, 4, 1, 1]. [2024-11-22 02:16:03,342 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,345 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,358 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 02:16:03,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 02:16:03,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 02:16:03,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 02:16:03,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (1/1) ... [2024-11-22 02:16:03,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:16:03,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:03,396 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) [2024-11-22 02:16:03,400 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 [2024-11-22 02:16:03,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 02:16:03,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 02:16:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 02:16:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 02:16:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-22 02:16:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-22 02:16:03,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-22 02:16:03,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-22 02:16:03,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 02:16:03,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 02:16:03,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 02:16:03,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 02:16:03,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-22 02:16:03,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-22 02:16:03,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 02:16:03,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-22 02:16:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_51_0 [2024-11-22 02:16:03,449 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_51_0 [2024-11-22 02:16:03,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 02:16:03,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 02:16:03,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 02:16:03,546 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 02:16:03,548 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 02:16:03,837 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-11-22 02:16:03,837 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 02:16:03,852 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 02:16:03,852 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-22 02:16:03,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:16:03 BoogieIcfgContainer [2024-11-22 02:16:03,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 02:16:03,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 02:16:03,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 02:16:03,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 02:16:03,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:16:02" (1/3) ... [2024-11-22 02:16:03,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6712e5e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:16:03, skipping insertion in model container [2024-11-22 02:16:03,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:03" (2/3) ... [2024-11-22 02:16:03,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6712e5e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:16:03, skipping insertion in model container [2024-11-22 02:16:03,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:16:03" (3/3) ... [2024-11-22 02:16:03,860 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_prod4br-ll.c [2024-11-22 02:16:03,875 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 02:16:03,875 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 02:16:03,923 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 02:16:03,928 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;@2c7c901c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 02:16:03,928 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 02:16:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 25 states have (on average 1.48) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 02:16:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-22 02:16:03,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:03,938 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:03,938 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:03,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 784566562, now seen corresponding path program 1 times [2024-11-22 02:16:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094832872] [2024-11-22 02:16:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:03,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:16:04,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:04,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094832872] [2024-11-22 02:16:04,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094832872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:04,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:16:04,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 02:16:04,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335761705] [2024-11-22 02:16:04,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:04,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 02:16:04,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 02:16:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 02:16:04,182 INFO L87 Difference]: Start difference. First operand has 34 states, 25 states have (on average 1.48) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 02:16:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:04,198 INFO L93 Difference]: Finished difference Result 65 states and 95 transitions. [2024-11-22 02:16:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 02:16:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-22 02:16:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:04,204 INFO L225 Difference]: With dead ends: 65 [2024-11-22 02:16:04,204 INFO L226 Difference]: Without dead ends: 30 [2024-11-22 02:16:04,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 02:16:04,209 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:04,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 02:16:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-22 02:16:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-22 02:16:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-11-22 02:16:04,236 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 11 [2024-11-22 02:16:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:04,236 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-11-22 02:16:04,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 02:16:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-11-22 02:16:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-22 02:16:04,237 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:04,237 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:04,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 02:16:04,238 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:04,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1464624932, now seen corresponding path program 1 times [2024-11-22 02:16:04,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:04,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898461080] [2024-11-22 02:16:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:04,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:04,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977701484] [2024-11-22 02:16:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:04,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:04,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:04,304 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) [2024-11-22 02:16:04,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 02:16:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:04,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-22 02:16:04,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:04,509 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 [2024-11-22 02:16:04,514 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 [2024-11-22 02:16:04,529 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 11 [2024-11-22 02:16:04,537 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 11 [2024-11-22 02:16:04,547 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 [2024-11-22 02:16:04,560 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 [2024-11-22 02:16:04,749 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 19 treesize of output 11 [2024-11-22 02:16:04,754 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 15 treesize of output 7 [2024-11-22 02:16:04,761 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 19 treesize of output 11 [2024-11-22 02:16:04,764 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 15 treesize of output 7 [2024-11-22 02:16:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:16:04,820 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:04,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:04,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898461080] [2024-11-22 02:16:04,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:04,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977701484] [2024-11-22 02:16:04,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977701484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:04,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:16:04,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 02:16:04,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892465398] [2024-11-22 02:16:04,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:04,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 02:16:04,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:04,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 02:16:04,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-22 02:16:04,827 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 02:16:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:05,086 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2024-11-22 02:16:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 02:16:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-22 02:16:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:05,088 INFO L225 Difference]: With dead ends: 51 [2024-11-22 02:16:05,089 INFO L226 Difference]: Without dead ends: 49 [2024-11-22 02:16:05,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 02:16:05,090 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:05,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 131 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:16:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-22 02:16:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2024-11-22 02:16:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 33 states have internal predecessors, (42), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 02:16:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2024-11-22 02:16:05,103 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 11 [2024-11-22 02:16:05,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:05,104 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2024-11-22 02:16:05,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 02:16:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2024-11-22 02:16:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-22 02:16:05,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:05,105 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:05,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 02:16:05,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:05,306 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:05,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash -667122419, now seen corresponding path program 1 times [2024-11-22 02:16:05,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:05,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854111510] [2024-11-22 02:16:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:05,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:16:05,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:05,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854111510] [2024-11-22 02:16:05,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854111510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:05,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:16:05,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 02:16:05,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788484280] [2024-11-22 02:16:05,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:05,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 02:16:05,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 02:16:05,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-22 02:16:05,823 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:16:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:06,019 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2024-11-22 02:16:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 02:16:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-22 02:16:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:06,022 INFO L225 Difference]: With dead ends: 64 [2024-11-22 02:16:06,022 INFO L226 Difference]: Without dead ends: 52 [2024-11-22 02:16:06,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-22 02:16:06,025 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:06,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:16:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-22 02:16:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-11-22 02:16:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 38 states have internal predecessors, (46), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-22 02:16:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2024-11-22 02:16:06,040 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 22 [2024-11-22 02:16:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:06,040 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2024-11-22 02:16:06,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:16:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2024-11-22 02:16:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-22 02:16:06,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:06,041 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:06,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 02:16:06,041 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:06,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 12935951, now seen corresponding path program 1 times [2024-11-22 02:16:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:06,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667660346] [2024-11-22 02:16:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:06,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:06,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084212121] [2024-11-22 02:16:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:06,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:06,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:06,079 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) [2024-11-22 02:16:06,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 02:16:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:06,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 02:16:06,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:06,179 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 [2024-11-22 02:16:06,185 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 11 [2024-11-22 02:16:06,198 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 11 treesize of output 7 [2024-11-22 02:16:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:16:06,359 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:06,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:06,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667660346] [2024-11-22 02:16:06,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:06,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084212121] [2024-11-22 02:16:06,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084212121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:06,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:16:06,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-22 02:16:06,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110997454] [2024-11-22 02:16:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:06,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 02:16:06,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 02:16:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-22 02:16:06,361 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:16:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:06,630 INFO L93 Difference]: Finished difference Result 87 states and 122 transitions. [2024-11-22 02:16:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 02:16:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-22 02:16:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:06,631 INFO L225 Difference]: With dead ends: 87 [2024-11-22 02:16:06,631 INFO L226 Difference]: Without dead ends: 58 [2024-11-22 02:16:06,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-22 02:16:06,633 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:06,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 116 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:16:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-22 02:16:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2024-11-22 02:16:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 43 states have internal predecessors, (49), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-22 02:16:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2024-11-22 02:16:06,641 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 22 [2024-11-22 02:16:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:06,641 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2024-11-22 02:16:06,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:16:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2024-11-22 02:16:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-22 02:16:06,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:06,641 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:06,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 02:16:06,842 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 [2024-11-22 02:16:06,842 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:06,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash -572145724, now seen corresponding path program 1 times [2024-11-22 02:16:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565565917] [2024-11-22 02:16:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:06,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702270431] [2024-11-22 02:16:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:06,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:06,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:06,907 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) [2024-11-22 02:16:06,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 02:16:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:07,010 WARN L253 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-22 02:16:07,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:07,026 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 [2024-11-22 02:16:07,029 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 [2024-11-22 02:16:07,037 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 [2024-11-22 02:16:07,042 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 [2024-11-22 02:16:07,049 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 11 [2024-11-22 02:16:07,055 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 11 [2024-11-22 02:16:07,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 22 [2024-11-22 02:16:07,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 22 [2024-11-22 02:16:07,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2024-11-22 02:16:07,631 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 30 treesize of output 18 [2024-11-22 02:16:07,636 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 17 treesize of output 9 [2024-11-22 02:16:07,657 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 30 treesize of output 18 [2024-11-22 02:16:07,672 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 17 treesize of output 9 [2024-11-22 02:16:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:16:07,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:16:08,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565565917] [2024-11-22 02:16:08,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702270431] [2024-11-22 02:16:08,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702270431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:16:08,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 02:16:08,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-11-22 02:16:08,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775480488] [2024-11-22 02:16:08,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:08,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 02:16:08,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 02:16:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-22 02:16:08,658 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:16:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:16,893 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2024-11-22 02:16:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 02:16:16,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-22 02:16:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:16,895 INFO L225 Difference]: With dead ends: 106 [2024-11-22 02:16:16,895 INFO L226 Difference]: Without dead ends: 102 [2024-11-22 02:16:16,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2024-11-22 02:16:16,896 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:16,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 263 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-22 02:16:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-22 02:16:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2024-11-22 02:16:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.25) internal successors, (70), 60 states have internal predecessors, (70), 11 states have call successors, (11), 8 states have call predecessors, (11), 11 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2024-11-22 02:16:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2024-11-22 02:16:16,915 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 24 [2024-11-22 02:16:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:16,915 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2024-11-22 02:16:16,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:16:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2024-11-22 02:16:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-22 02:16:16,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:16,916 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:16,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 02:16:17,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:17,117 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:17,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:17,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1650254103, now seen corresponding path program 1 times [2024-11-22 02:16:17,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:17,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532762282] [2024-11-22 02:16:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:17,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:17,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90180271] [2024-11-22 02:16:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:17,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:17,140 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) [2024-11-22 02:16:17,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 02:16:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:17,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 02:16:17,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:17,220 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 15 treesize of output 11 [2024-11-22 02:16:17,223 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 [2024-11-22 02:16:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:16:17,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:17,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532762282] [2024-11-22 02:16:17,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:17,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90180271] [2024-11-22 02:16:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90180271] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:17,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:17,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 14 [2024-11-22 02:16:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177292106] [2024-11-22 02:16:17,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:17,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 02:16:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 02:16:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-22 02:16:17,435 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 02:16:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:17,576 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2024-11-22 02:16:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 02:16:17,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2024-11-22 02:16:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:17,580 INFO L225 Difference]: With dead ends: 84 [2024-11-22 02:16:17,580 INFO L226 Difference]: Without dead ends: 69 [2024-11-22 02:16:17,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-22 02:16:17,581 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:17,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 155 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:16:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-22 02:16:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2024-11-22 02:16:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 51 states have internal predecessors, (60), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-22 02:16:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2024-11-22 02:16:17,594 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 28 [2024-11-22 02:16:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:17,594 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2024-11-22 02:16:17,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 02:16:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2024-11-22 02:16:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-22 02:16:17,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:17,596 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:17,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 02:16:17,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:17,796 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:17,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:17,797 INFO L85 PathProgramCache]: Analyzing trace with hash -423181544, now seen corresponding path program 1 times [2024-11-22 02:16:17,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:17,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879330328] [2024-11-22 02:16:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:17,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 02:16:18,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:18,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879330328] [2024-11-22 02:16:18,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879330328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:18,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398642550] [2024-11-22 02:16:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:18,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:18,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:18,442 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) [2024-11-22 02:16:18,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 02:16:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:18,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-22 02:16:18,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:18,565 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 [2024-11-22 02:16:18,566 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 19 treesize of output 11 [2024-11-22 02:16:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 02:16:18,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:19,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398642550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:16:19,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:16:19,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 27 [2024-11-22 02:16:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839872758] [2024-11-22 02:16:19,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:19,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 02:16:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 02:16:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2024-11-22 02:16:19,240 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 27 states, 22 states have (on average 2.0) internal successors, (44), 24 states have internal predecessors, (44), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-22 02:16:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:19,705 INFO L93 Difference]: Finished difference Result 96 states and 151 transitions. [2024-11-22 02:16:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 02:16:19,705 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.0) internal successors, (44), 24 states have internal predecessors, (44), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 37 [2024-11-22 02:16:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:19,707 INFO L225 Difference]: With dead ends: 96 [2024-11-22 02:16:19,707 INFO L226 Difference]: Without dead ends: 82 [2024-11-22 02:16:19,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 02:16:19,708 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 94 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:19,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 116 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 02:16:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-22 02:16:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2024-11-22 02:16:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 50 states have internal predecessors, (58), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-22 02:16:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2024-11-22 02:16:19,722 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 37 [2024-11-22 02:16:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:19,722 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2024-11-22 02:16:19,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.0) internal successors, (44), 24 states have internal predecessors, (44), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-22 02:16:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2024-11-22 02:16:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-22 02:16:19,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:19,724 INFO L215 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] [2024-11-22 02:16:19,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 02:16:19,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:19,924 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:19,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:19,925 INFO L85 PathProgramCache]: Analyzing trace with hash 277883034, now seen corresponding path program 1 times [2024-11-22 02:16:19,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:19,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925898652] [2024-11-22 02:16:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:19,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 02:16:20,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925898652] [2024-11-22 02:16:20,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925898652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480696399] [2024-11-22 02:16:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:20,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:20,482 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) [2024-11-22 02:16:20,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 02:16:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:20,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 02:16:20,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:20,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 35 treesize of output 19 [2024-11-22 02:16:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:20,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:20,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480696399] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:16:20,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:16:20,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-11-22 02:16:20,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710754548] [2024-11-22 02:16:20,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:20,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 02:16:20,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 02:16:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2024-11-22 02:16:20,909 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-22 02:16:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:21,287 INFO L93 Difference]: Finished difference Result 103 states and 201 transitions. [2024-11-22 02:16:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 02:16:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 37 [2024-11-22 02:16:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:21,290 INFO L225 Difference]: With dead ends: 103 [2024-11-22 02:16:21,290 INFO L226 Difference]: Without dead ends: 86 [2024-11-22 02:16:21,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2024-11-22 02:16:21,291 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:21,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 137 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 02:16:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-22 02:16:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2024-11-22 02:16:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 53 states have internal predecessors, (64), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-22 02:16:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2024-11-22 02:16:21,331 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 37 [2024-11-22 02:16:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:21,332 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2024-11-22 02:16:21,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-22 02:16:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2024-11-22 02:16:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-22 02:16:21,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:21,335 INFO L215 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] [2024-11-22 02:16:21,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 02:16:21,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:21,536 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:21,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1657766048, now seen corresponding path program 1 times [2024-11-22 02:16:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:21,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746602234] [2024-11-22 02:16:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:21,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:21,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498021235] [2024-11-22 02:16:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:21,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:21,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:21,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:21,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 02:16:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:21,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-22 02:16:21,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:21,697 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 [2024-11-22 02:16:21,704 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 [2024-11-22 02:16:21,718 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 11 [2024-11-22 02:16:21,722 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 [2024-11-22 02:16:21,731 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 11 [2024-11-22 02:16:21,736 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 [2024-11-22 02:16:21,754 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 11 treesize of output 7 [2024-11-22 02:16:21,765 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 11 treesize of output 7 [2024-11-22 02:16:22,592 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 36 treesize of output 24 [2024-11-22 02:16:22,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 15 [2024-11-22 02:16:22,634 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 19 treesize of output 11 [2024-11-22 02:16:22,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:16:22,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2024-11-22 02:16:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:22,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:23,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:23,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746602234] [2024-11-22 02:16:23,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:23,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498021235] [2024-11-22 02:16:23,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498021235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:23,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:23,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-22 02:16:23,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084662296] [2024-11-22 02:16:23,657 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:23,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 02:16:23,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 02:16:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-11-22 02:16:23,658 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:27,674 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] [2024-11-22 02:16:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:28,704 INFO L93 Difference]: Finished difference Result 97 states and 159 transitions. [2024-11-22 02:16:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 02:16:28,704 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2024-11-22 02:16:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:28,706 INFO L225 Difference]: With dead ends: 97 [2024-11-22 02:16:28,707 INFO L226 Difference]: Without dead ends: 83 [2024-11-22 02:16:28,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2024-11-22 02:16:28,709 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:28,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 131 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 573 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-11-22 02:16:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-22 02:16:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2024-11-22 02:16:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 64 states have internal predecessors, (75), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (38), 10 states have call predecessors, (38), 13 states have call successors, (38) [2024-11-22 02:16:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 127 transitions. [2024-11-22 02:16:28,724 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 127 transitions. Word has length 39 [2024-11-22 02:16:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:28,724 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 127 transitions. [2024-11-22 02:16:28,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 127 transitions. [2024-11-22 02:16:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:28,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:28,726 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:28,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 02:16:28,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:28,929 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:28,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1332434696, now seen corresponding path program 1 times [2024-11-22 02:16:28,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:28,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484253741] [2024-11-22 02:16:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:28,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:29,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:29,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484253741] [2024-11-22 02:16:29,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484253741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:29,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904139544] [2024-11-22 02:16:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:29,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:29,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:29,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 02:16:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:29,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 02:16:29,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:29,456 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:29,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904139544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:29,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:29,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-11-22 02:16:29,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150389086] [2024-11-22 02:16:29,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:29,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 02:16:29,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:29,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 02:16:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 02:16:29,457 INFO L87 Difference]: Start difference. First operand 82 states and 127 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-11-22 02:16:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:29,554 INFO L93 Difference]: Finished difference Result 140 states and 237 transitions. [2024-11-22 02:16:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 02:16:29,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 41 [2024-11-22 02:16:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:29,556 INFO L225 Difference]: With dead ends: 140 [2024-11-22 02:16:29,556 INFO L226 Difference]: Without dead ends: 88 [2024-11-22 02:16:29,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-22 02:16:29,557 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:29,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 117 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:16:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-22 02:16:29,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2024-11-22 02:16:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 68 states have internal predecessors, (79), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (38), 10 states have call predecessors, (38), 13 states have call successors, (38) [2024-11-22 02:16:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 131 transitions. [2024-11-22 02:16:29,577 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 131 transitions. Word has length 41 [2024-11-22 02:16:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:29,578 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 131 transitions. [2024-11-22 02:16:29,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-11-22 02:16:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 131 transitions. [2024-11-22 02:16:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:29,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:29,579 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:29,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 02:16:29,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 02:16:29,780 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:29,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1973991240, now seen corresponding path program 1 times [2024-11-22 02:16:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:29,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977406059] [2024-11-22 02:16:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:30,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:30,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977406059] [2024-11-22 02:16:30,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977406059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:30,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063567444] [2024-11-22 02:16:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:30,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:30,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:30,094 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 02:16:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:30,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 02:16:30,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:30,244 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063567444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:30,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:30,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-11-22 02:16:30,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856685612] [2024-11-22 02:16:30,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:30,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 02:16:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 02:16:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-22 02:16:30,246 INFO L87 Difference]: Start difference. First operand 86 states and 131 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-11-22 02:16:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:30,313 INFO L93 Difference]: Finished difference Result 140 states and 243 transitions. [2024-11-22 02:16:30,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 02:16:30,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 41 [2024-11-22 02:16:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:30,315 INFO L225 Difference]: With dead ends: 140 [2024-11-22 02:16:30,315 INFO L226 Difference]: Without dead ends: 84 [2024-11-22 02:16:30,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-22 02:16:30,316 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:30,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:16:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-22 02:16:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2024-11-22 02:16:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 65 states have internal predecessors, (74), 13 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (35), 10 states have call predecessors, (35), 12 states have call successors, (35) [2024-11-22 02:16:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 122 transitions. [2024-11-22 02:16:30,332 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 122 transitions. Word has length 41 [2024-11-22 02:16:30,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:30,332 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 122 transitions. [2024-11-22 02:16:30,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-11-22 02:16:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 122 transitions. [2024-11-22 02:16:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-22 02:16:30,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:30,334 INFO L215 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] [2024-11-22 02:16:30,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 02:16:30,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:30,535 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:30,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1876620766, now seen corresponding path program 1 times [2024-11-22 02:16:30,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:30,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424650585] [2024-11-22 02:16:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:30,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 02:16:30,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:30,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424650585] [2024-11-22 02:16:30,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424650585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:30,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:16:30,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 02:16:30,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926553677] [2024-11-22 02:16:30,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:30,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 02:16:30,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 02:16:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 02:16:30,565 INFO L87 Difference]: Start difference. First operand 83 states and 122 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 02:16:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:30,579 INFO L93 Difference]: Finished difference Result 135 states and 210 transitions. [2024-11-22 02:16:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 02:16:30,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-22 02:16:30,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:30,581 INFO L225 Difference]: With dead ends: 135 [2024-11-22 02:16:30,581 INFO L226 Difference]: Without dead ends: 82 [2024-11-22 02:16:30,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 02:16:30,582 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:30,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 02:16:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-22 02:16:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-22 02:16:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 64 states have internal predecessors, (73), 12 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (29), 10 states have call predecessors, (29), 11 states have call successors, (29) [2024-11-22 02:16:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 114 transitions. [2024-11-22 02:16:30,593 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 114 transitions. Word has length 39 [2024-11-22 02:16:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:30,593 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 114 transitions. [2024-11-22 02:16:30,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 02:16:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 114 transitions. [2024-11-22 02:16:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:30,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:30,595 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:30,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 02:16:30,595 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:30,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1198421190, now seen corresponding path program 1 times [2024-11-22 02:16:30,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:30,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515326143] [2024-11-22 02:16:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:30,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:30,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419309842] [2024-11-22 02:16:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:30,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:30,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:30,628 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:30,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 02:16:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:30,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-22 02:16:30,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:30,741 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 [2024-11-22 02:16:30,744 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 [2024-11-22 02:16:30,747 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 11 [2024-11-22 02:16:30,750 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 11 [2024-11-22 02:16:30,755 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 [2024-11-22 02:16:30,770 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 11 treesize of output 7 [2024-11-22 02:16:30,777 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 11 treesize of output 7 [2024-11-22 02:16:31,246 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 27 treesize of output 19 [2024-11-22 02:16:31,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 15 [2024-11-22 02:16:31,269 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 19 treesize of output 11 [2024-11-22 02:16:31,271 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 15 treesize of output 7 [2024-11-22 02:16:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:31,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515326143] [2024-11-22 02:16:31,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419309842] [2024-11-22 02:16:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419309842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:31,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:31,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-22 02:16:31,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963757300] [2024-11-22 02:16:31,857 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:31,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 02:16:31,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 02:16:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-11-22 02:16:31,859 INFO L87 Difference]: Start difference. First operand 82 states and 114 transitions. Second operand has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:32,362 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2024-11-22 02:16:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 02:16:32,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-11-22 02:16:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:32,364 INFO L225 Difference]: With dead ends: 94 [2024-11-22 02:16:32,364 INFO L226 Difference]: Without dead ends: 92 [2024-11-22 02:16:32,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-11-22 02:16:32,366 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:32,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 02:16:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-22 02:16:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2024-11-22 02:16:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 66 states have internal predecessors, (74), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (41), 11 states have call predecessors, (41), 12 states have call successors, (41) [2024-11-22 02:16:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 128 transitions. [2024-11-22 02:16:32,378 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 128 transitions. Word has length 41 [2024-11-22 02:16:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:32,378 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 128 transitions. [2024-11-22 02:16:32,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 128 transitions. [2024-11-22 02:16:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:32,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:32,380 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:32,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 02:16:32,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 02:16:32,585 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:32,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1621123016, now seen corresponding path program 1 times [2024-11-22 02:16:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:32,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021898346] [2024-11-22 02:16:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:32,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 02:16:33,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021898346] [2024-11-22 02:16:33,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021898346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525218797] [2024-11-22 02:16:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:33,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:33,029 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:33,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 02:16:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:33,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 02:16:33,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:33,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 37 treesize of output 21 [2024-11-22 02:16:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:33,337 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:33,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525218797] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:33,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:33,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 15 [2024-11-22 02:16:33,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704141422] [2024-11-22 02:16:33,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:33,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 02:16:33,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 02:16:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-22 02:16:33,338 INFO L87 Difference]: Start difference. First operand 85 states and 128 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:16:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:33,617 INFO L93 Difference]: Finished difference Result 100 states and 163 transitions. [2024-11-22 02:16:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 02:16:33,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2024-11-22 02:16:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:33,618 INFO L225 Difference]: With dead ends: 100 [2024-11-22 02:16:33,618 INFO L226 Difference]: Without dead ends: 88 [2024-11-22 02:16:33,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-11-22 02:16:33,619 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:33,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 107 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:16:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-22 02:16:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2024-11-22 02:16:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 67 states have internal predecessors, (74), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (45), 11 states have call predecessors, (45), 13 states have call successors, (45) [2024-11-22 02:16:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 133 transitions. [2024-11-22 02:16:33,634 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 133 transitions. Word has length 41 [2024-11-22 02:16:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:33,634 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 133 transitions. [2024-11-22 02:16:33,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:16:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 133 transitions. [2024-11-22 02:16:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:33,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:33,635 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:33,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 02:16:33,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 02:16:33,840 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:33,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1839977734, now seen corresponding path program 1 times [2024-11-22 02:16:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:33,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668245567] [2024-11-22 02:16:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:34,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668245567] [2024-11-22 02:16:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668245567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251682978] [2024-11-22 02:16:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:34,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:34,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:34,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:34,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 02:16:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:34,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 02:16:34,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:34,380 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:34,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251682978] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:34,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:34,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-11-22 02:16:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035523234] [2024-11-22 02:16:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:34,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 02:16:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:34,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 02:16:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-22 02:16:34,381 INFO L87 Difference]: Start difference. First operand 86 states and 133 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-11-22 02:16:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:34,451 INFO L93 Difference]: Finished difference Result 141 states and 234 transitions. [2024-11-22 02:16:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 02:16:34,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 41 [2024-11-22 02:16:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:34,463 INFO L225 Difference]: With dead ends: 141 [2024-11-22 02:16:34,463 INFO L226 Difference]: Without dead ends: 85 [2024-11-22 02:16:34,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-22 02:16:34,464 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:34,465 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 118 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:16:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-22 02:16:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2024-11-22 02:16:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 65 states have internal predecessors, (72), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (39), 11 states have call predecessors, (39), 12 states have call successors, (39) [2024-11-22 02:16:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 124 transitions. [2024-11-22 02:16:34,476 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 124 transitions. Word has length 41 [2024-11-22 02:16:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:34,476 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 124 transitions. [2024-11-22 02:16:34,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-11-22 02:16:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 124 transitions. [2024-11-22 02:16:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:34,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:34,477 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:34,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 02:16:34,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 02:16:34,678 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:34,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2036030854, now seen corresponding path program 1 times [2024-11-22 02:16:34,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:34,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304160803] [2024-11-22 02:16:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:34,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:34,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089864422] [2024-11-22 02:16:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:34,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:34,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:34,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:34,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 02:16:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:34,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-22 02:16:34,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:34,848 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 11 [2024-11-22 02:16:34,853 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 [2024-11-22 02:16:34,857 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 [2024-11-22 02:16:34,862 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 11 [2024-11-22 02:16:34,875 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 11 treesize of output 7 [2024-11-22 02:16:34,880 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 11 treesize of output 7 [2024-11-22 02:16:35,700 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 42 treesize of output 26 [2024-11-22 02:16:35,704 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 23 treesize of output 15 [2024-11-22 02:16:35,736 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 19 treesize of output 11 [2024-11-22 02:16:35,738 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 30 treesize of output 14 [2024-11-22 02:16:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:35,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:37,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:37,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304160803] [2024-11-22 02:16:37,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:37,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089864422] [2024-11-22 02:16:37,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089864422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:37,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:37,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-22 02:16:37,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331172050] [2024-11-22 02:16:37,030 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:37,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 02:16:37,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 02:16:37,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-11-22 02:16:37,031 INFO L87 Difference]: Start difference. First operand 84 states and 124 transitions. Second operand has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:38,133 INFO L93 Difference]: Finished difference Result 99 states and 160 transitions. [2024-11-22 02:16:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 02:16:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-11-22 02:16:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:38,134 INFO L225 Difference]: With dead ends: 99 [2024-11-22 02:16:38,135 INFO L226 Difference]: Without dead ends: 97 [2024-11-22 02:16:38,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2024-11-22 02:16:38,135 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:38,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 149 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-22 02:16:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-22 02:16:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2024-11-22 02:16:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 67 states have internal predecessors, (73), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (46), 11 states have call predecessors, (46), 13 states have call successors, (46) [2024-11-22 02:16:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 133 transitions. [2024-11-22 02:16:38,152 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 133 transitions. Word has length 41 [2024-11-22 02:16:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:38,152 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 133 transitions. [2024-11-22 02:16:38,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 133 transitions. [2024-11-22 02:16:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:38,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:38,153 INFO L215 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] [2024-11-22 02:16:38,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 02:16:38,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 02:16:38,358 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:38,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:38,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1557871864, now seen corresponding path program 1 times [2024-11-22 02:16:38,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:38,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855975238] [2024-11-22 02:16:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:38,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:38,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504533918] [2024-11-22 02:16:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:38,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:38,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:38,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:38,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 02:16:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:38,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-22 02:16:38,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:38,582 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 [2024-11-22 02:16:38,597 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 11 [2024-11-22 02:16:38,600 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 [2024-11-22 02:16:38,605 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 [2024-11-22 02:16:38,611 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 11 [2024-11-22 02:16:38,635 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 11 treesize of output 7 [2024-11-22 02:16:38,640 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 11 treesize of output 7 [2024-11-22 02:16:40,295 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 37 treesize of output 25 [2024-11-22 02:16:40,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 15 [2024-11-22 02:16:40,348 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 19 treesize of output 11 [2024-11-22 02:16:40,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:16:40,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2024-11-22 02:16:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:40,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:41,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855975238] [2024-11-22 02:16:41,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504533918] [2024-11-22 02:16:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504533918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:41,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:41,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-22 02:16:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853482412] [2024-11-22 02:16:41,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:41,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 02:16:41,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:41,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 02:16:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2024-11-22 02:16:41,527 INFO L87 Difference]: Start difference. First operand 86 states and 133 transitions. Second operand has 23 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:45,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:16:46,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-22 02:16:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:48,001 INFO L93 Difference]: Finished difference Result 99 states and 160 transitions. [2024-11-22 02:16:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 02:16:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-11-22 02:16:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:48,003 INFO L225 Difference]: With dead ends: 99 [2024-11-22 02:16:48,003 INFO L226 Difference]: Without dead ends: 97 [2024-11-22 02:16:48,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2024-11-22 02:16:48,004 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:48,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 130 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 577 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2024-11-22 02:16:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-22 02:16:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2024-11-22 02:16:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 67 states have internal predecessors, (73), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (46), 11 states have call predecessors, (46), 13 states have call successors, (46) [2024-11-22 02:16:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 133 transitions. [2024-11-22 02:16:48,018 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 133 transitions. Word has length 41 [2024-11-22 02:16:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:48,018 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 133 transitions. [2024-11-22 02:16:48,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 133 transitions. [2024-11-22 02:16:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:48,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:48,019 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:48,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 02:16:48,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:48,220 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:48,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1683162630, now seen corresponding path program 1 times [2024-11-22 02:16:48,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308293867] [2024-11-22 02:16:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:48,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308293867] [2024-11-22 02:16:48,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308293867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275056567] [2024-11-22 02:16:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:48,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:48,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:48,589 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:48,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 02:16:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:48,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 02:16:48,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:48,777 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275056567] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:48,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:48,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-11-22 02:16:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649412444] [2024-11-22 02:16:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:48,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 02:16:48,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 02:16:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-22 02:16:48,779 INFO L87 Difference]: Start difference. First operand 86 states and 133 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-11-22 02:16:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:48,839 INFO L93 Difference]: Finished difference Result 147 states and 253 transitions. [2024-11-22 02:16:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 02:16:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 41 [2024-11-22 02:16:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:48,840 INFO L225 Difference]: With dead ends: 147 [2024-11-22 02:16:48,840 INFO L226 Difference]: Without dead ends: 85 [2024-11-22 02:16:48,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-22 02:16:48,841 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:48,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 02:16:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-22 02:16:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-22 02:16:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 66 states have internal predecessors, (69), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (46), 11 states have call predecessors, (46), 13 states have call successors, (46) [2024-11-22 02:16:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 129 transitions. [2024-11-22 02:16:48,852 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 129 transitions. Word has length 41 [2024-11-22 02:16:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:48,852 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 129 transitions. [2024-11-22 02:16:48,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2024-11-22 02:16:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 129 transitions. [2024-11-22 02:16:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:48,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:48,853 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-22 02:16:48,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 02:16:49,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 02:16:49,054 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:49,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:49,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1902017348, now seen corresponding path program 1 times [2024-11-22 02:16:49,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:49,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222450696] [2024-11-22 02:16:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:49,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:49,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202438351] [2024-11-22 02:16:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:49,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:49,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:49,078 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:49,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 02:16:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:49,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-22 02:16:49,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:49,257 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 [2024-11-22 02:16:49,258 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 [2024-11-22 02:16:49,261 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 11 [2024-11-22 02:16:49,265 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 11 [2024-11-22 02:16:49,269 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 [2024-11-22 02:16:49,276 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 [2024-11-22 02:16:49,291 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 11 treesize of output 7 [2024-11-22 02:16:49,295 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 11 treesize of output 7 [2024-11-22 02:16:49,994 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 46 treesize of output 30 [2024-11-22 02:16:49,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 15 [2024-11-22 02:16:50,026 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 19 treesize of output 11 [2024-11-22 02:16:50,027 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 34 treesize of output 18 [2024-11-22 02:16:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:50,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:55,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:55,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222450696] [2024-11-22 02:16:55,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:55,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202438351] [2024-11-22 02:16:55,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202438351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:55,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:55,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-22 02:16:55,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355544427] [2024-11-22 02:16:55,018 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:55,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 02:16:55,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:55,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 02:16:55,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=474, Unknown=1, NotChecked=0, Total=552 [2024-11-22 02:16:55,019 INFO L87 Difference]: Start difference. First operand 85 states and 129 transitions. Second operand has 19 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:56,350 INFO L93 Difference]: Finished difference Result 98 states and 156 transitions. [2024-11-22 02:16:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 02:16:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-11-22 02:16:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:56,352 INFO L225 Difference]: With dead ends: 98 [2024-11-22 02:16:56,352 INFO L226 Difference]: Without dead ends: 96 [2024-11-22 02:16:56,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=126, Invalid=803, Unknown=1, NotChecked=0, Total=930 [2024-11-22 02:16:56,353 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:56,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 161 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-22 02:16:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-22 02:16:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2024-11-22 02:16:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 66 states have internal predecessors, (69), 14 states have call successors, (14), 7 states have call predecessors, (14), 11 states have return successors, (46), 11 states have call predecessors, (46), 13 states have call successors, (46) [2024-11-22 02:16:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 129 transitions. [2024-11-22 02:16:56,364 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 129 transitions. Word has length 41 [2024-11-22 02:16:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:56,364 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 129 transitions. [2024-11-22 02:16:56,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 02:16:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 129 transitions. [2024-11-22 02:16:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:16:56,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:56,365 INFO L215 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] [2024-11-22 02:16:56,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 02:16:56,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:56,566 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:56,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1691885370, now seen corresponding path program 1 times [2024-11-22 02:16:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:56,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068294215] [2024-11-22 02:16:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:56,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 02:16:56,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:56,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068294215] [2024-11-22 02:16:56,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068294215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:56,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75979146] [2024-11-22 02:16:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:56,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:56,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:56,962 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:56,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 02:16:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:57,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-22 02:16:57,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:57,100 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 15 treesize of output 11 [2024-11-22 02:16:57,103 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 [2024-11-22 02:16:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 02:16:57,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75979146] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 02:16:57,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 26 [2024-11-22 02:16:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014671216] [2024-11-22 02:16:57,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:57,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 02:16:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 02:16:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2024-11-22 02:16:57,694 INFO L87 Difference]: Start difference. First operand 85 states and 129 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:16:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:58,044 INFO L93 Difference]: Finished difference Result 103 states and 175 transitions. [2024-11-22 02:16:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 02:16:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2024-11-22 02:16:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:58,045 INFO L225 Difference]: With dead ends: 103 [2024-11-22 02:16:58,045 INFO L226 Difference]: Without dead ends: 91 [2024-11-22 02:16:58,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 02:16:58,046 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:58,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 123 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:16:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-22 02:16:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-11-22 02:16:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 68 states have internal predecessors, (71), 14 states have call successors, (14), 7 states have call predecessors, (14), 13 states have return successors, (58), 13 states have call predecessors, (58), 13 states have call successors, (58) [2024-11-22 02:16:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 143 transitions. [2024-11-22 02:16:58,063 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 143 transitions. Word has length 41 [2024-11-22 02:16:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:58,063 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 143 transitions. [2024-11-22 02:16:58,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:16:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 143 transitions. [2024-11-22 02:16:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-22 02:16:58,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:58,064 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:58,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-22 02:16:58,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:58,265 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:58,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1044251861, now seen corresponding path program 1 times [2024-11-22 02:16:58,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:58,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50136058] [2024-11-22 02:16:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:58,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:58,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909373214] [2024-11-22 02:16:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:58,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:58,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:58,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:16:58,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 02:16:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:58,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-11-22 02:16:58,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:58,479 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 [2024-11-22 02:16:58,482 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 [2024-11-22 02:16:58,485 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 [2024-11-22 02:16:58,490 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 [2024-11-22 02:16:58,494 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 11 [2024-11-22 02:16:58,500 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 11 [2024-11-22 02:16:58,521 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 11 treesize of output 7 [2024-11-22 02:16:58,527 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 11 treesize of output 7 [2024-11-22 02:16:59,888 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 40 treesize of output 28 [2024-11-22 02:16:59,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 19 [2024-11-22 02:16:59,898 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 30 treesize of output 18 [2024-11-22 02:16:59,940 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 32 treesize of output 20 [2024-11-22 02:16:59,944 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 19 treesize of output 11 [2024-11-22 02:16:59,948 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 26 treesize of output 14 [2024-11-22 02:17:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 02:17:00,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:02,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:02,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50136058] [2024-11-22 02:17:02,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:17:02,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909373214] [2024-11-22 02:17:02,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909373214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:02,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:17:02,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-22 02:17:02,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347318010] [2024-11-22 02:17:02,440 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:02,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 02:17:02,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 02:17:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-22 02:17:02,441 INFO L87 Difference]: Start difference. First operand 89 states and 143 transitions. Second operand has 20 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 02:17:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:03,695 INFO L93 Difference]: Finished difference Result 102 states and 168 transitions. [2024-11-22 02:17:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 02:17:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2024-11-22 02:17:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:03,697 INFO L225 Difference]: With dead ends: 102 [2024-11-22 02:17:03,697 INFO L226 Difference]: Without dead ends: 100 [2024-11-22 02:17:03,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2024-11-22 02:17:03,698 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:03,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 219 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-22 02:17:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-22 02:17:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2024-11-22 02:17:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 68 states have internal predecessors, (71), 14 states have call successors, (14), 7 states have call predecessors, (14), 13 states have return successors, (58), 13 states have call predecessors, (58), 13 states have call successors, (58) [2024-11-22 02:17:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 143 transitions. [2024-11-22 02:17:03,711 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 143 transitions. Word has length 54 [2024-11-22 02:17:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:03,712 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 143 transitions. [2024-11-22 02:17:03,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 02:17:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 143 transitions. [2024-11-22 02:17:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-22 02:17:03,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:03,712 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:17:03,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-22 02:17:03,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:03,913 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:03,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash -514402863, now seen corresponding path program 1 times [2024-11-22 02:17:03,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:03,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859442016] [2024-11-22 02:17:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:03,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:17:03,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214878371] [2024-11-22 02:17:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:03,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:03,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:03,950 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:17:03,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 02:17:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:04,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-11-22 02:17:04,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:04,152 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 [2024-11-22 02:17:04,178 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 [2024-11-22 02:17:04,182 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 11 [2024-11-22 02:17:04,188 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 11 [2024-11-22 02:17:04,195 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 [2024-11-22 02:17:04,218 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 11 treesize of output 7 [2024-11-22 02:17:04,227 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 11 treesize of output 7 [2024-11-22 02:17:05,643 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 30 treesize of output 18 [2024-11-22 02:17:05,653 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 40 treesize of output 28 [2024-11-22 02:17:05,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 19 [2024-11-22 02:17:05,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:17:05,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2024-11-22 02:17:05,729 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 32 treesize of output 20 [2024-11-22 02:17:05,734 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 19 treesize of output 11 [2024-11-22 02:17:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 02:17:05,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:08,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:08,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859442016] [2024-11-22 02:17:08,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:17:08,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214878371] [2024-11-22 02:17:08,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214878371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:08,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:17:08,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-22 02:17:08,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356728106] [2024-11-22 02:17:08,058 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:08,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 02:17:08,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 02:17:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-22 02:17:08,059 INFO L87 Difference]: Start difference. First operand 89 states and 143 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 02:17:12,081 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] [2024-11-22 02:17:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:13,924 INFO L93 Difference]: Finished difference Result 104 states and 177 transitions. [2024-11-22 02:17:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 02:17:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2024-11-22 02:17:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:13,926 INFO L225 Difference]: With dead ends: 104 [2024-11-22 02:17:13,926 INFO L226 Difference]: Without dead ends: 102 [2024-11-22 02:17:13,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 02:17:13,927 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:13,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 162 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 816 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2024-11-22 02:17:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-22 02:17:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2024-11-22 02:17:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 69 states have internal predecessors, (72), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (66), 14 states have call predecessors, (66), 13 states have call successors, (66) [2024-11-22 02:17:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 152 transitions. [2024-11-22 02:17:13,942 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 152 transitions. Word has length 56 [2024-11-22 02:17:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:13,943 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 152 transitions. [2024-11-22 02:17:13,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 02:17:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 152 transitions. [2024-11-22 02:17:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-22 02:17:13,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:13,944 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:17:13,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-22 02:17:14,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:14,148 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:14,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash 682793875, now seen corresponding path program 1 times [2024-11-22 02:17:14,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:14,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890635416] [2024-11-22 02:17:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:14,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:17:14,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712911431] [2024-11-22 02:17:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:14,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:14,177 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:17:14,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-22 02:17:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:14,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-22 02:17:14,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:14,401 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 [2024-11-22 02:17:14,405 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 [2024-11-22 02:17:14,419 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 11 [2024-11-22 02:17:14,423 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 11 [2024-11-22 02:17:14,430 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 [2024-11-22 02:17:14,435 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 [2024-11-22 02:17:14,454 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 11 treesize of output 7 [2024-11-22 02:17:14,460 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 11 treesize of output 7 [2024-11-22 02:17:16,214 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 30 treesize of output 18 [2024-11-22 02:17:16,222 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 40 treesize of output 28 [2024-11-22 02:17:16,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 19 [2024-11-22 02:17:16,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:17:16,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2024-11-22 02:17:16,301 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 19 treesize of output 11 [2024-11-22 02:17:16,307 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 26 treesize of output 14 [2024-11-22 02:17:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 02:17:16,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:19,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:19,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890635416] [2024-11-22 02:17:19,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:17:19,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712911431] [2024-11-22 02:17:19,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712911431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:19,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:17:19,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-22 02:17:19,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106836381] [2024-11-22 02:17:19,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:19,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 02:17:19,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:19,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 02:17:19,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-11-22 02:17:19,421 INFO L87 Difference]: Start difference. First operand 91 states and 152 transitions. Second operand has 26 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 02:17:23,442 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] [2024-11-22 02:17:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:27,557 INFO L93 Difference]: Finished difference Result 106 states and 186 transitions. [2024-11-22 02:17:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-22 02:17:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2024-11-22 02:17:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:27,559 INFO L225 Difference]: With dead ends: 106 [2024-11-22 02:17:27,559 INFO L226 Difference]: Without dead ends: 104 [2024-11-22 02:17:27,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2024-11-22 02:17:27,560 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:27,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 172 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 937 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2024-11-22 02:17:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-22 02:17:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2024-11-22 02:17:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 69 states have internal predecessors, (72), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (66), 14 states have call predecessors, (66), 13 states have call successors, (66) [2024-11-22 02:17:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 152 transitions. [2024-11-22 02:17:27,579 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 152 transitions. Word has length 56 [2024-11-22 02:17:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:27,579 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 152 transitions. [2024-11-22 02:17:27,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 02:17:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 152 transitions. [2024-11-22 02:17:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-22 02:17:27,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:27,580 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:17:27,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-22 02:17:27,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-22 02:17:27,781 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:27,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1269599889, now seen corresponding path program 1 times [2024-11-22 02:17:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10663520] [2024-11-22 02:17:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:27,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:17:27,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458286774] [2024-11-22 02:17:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:27,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:27,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:27,821 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:17:27,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-22 02:17:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:28,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-11-22 02:17:28,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:28,035 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 [2024-11-22 02:17:28,057 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 [2024-11-22 02:17:28,065 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 11 [2024-11-22 02:17:28,070 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 [2024-11-22 02:17:28,077 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 11 [2024-11-22 02:17:28,111 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 11 treesize of output 7 [2024-11-22 02:17:28,114 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 11 treesize of output 7 [2024-11-22 02:17:29,923 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 30 treesize of output 18 [2024-11-22 02:17:29,930 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 40 treesize of output 28 [2024-11-22 02:17:29,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 19 [2024-11-22 02:17:29,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:17:29,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2024-11-22 02:17:30,000 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 23 treesize of output 15 [2024-11-22 02:17:30,003 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 28 treesize of output 16 [2024-11-22 02:17:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 02:17:30,081 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:32,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:32,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10663520] [2024-11-22 02:17:32,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:17:32,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458286774] [2024-11-22 02:17:32,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458286774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:32,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:17:32,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-22 02:17:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109545533] [2024-11-22 02:17:32,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:32,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 02:17:32,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:32,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 02:17:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-11-22 02:17:32,628 INFO L87 Difference]: Start difference. First operand 91 states and 152 transitions. Second operand has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)