./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.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 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 15:25:30,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 15:25:30,812 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 15:25:30,817 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 15:25:30,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 15:25:30,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 15:25:30,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 15:25:30,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 15:25:30,841 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 15:25:30,842 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 15:25:30,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 15:25:30,843 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 15:25:30,843 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 15:25:30,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 15:25:30,846 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 15:25:30,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 15:25:30,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 15:25:30,847 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 15:25:30,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 15:25:30,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 15:25:30,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 15:25:30,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 15:25:30,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 15:25:30,848 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 15:25:30,848 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 15:25:30,848 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 15:25:30,848 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 15:25:30,848 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 15:25:30,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 15:25:30,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 15:25:30,849 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 15:25:30,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 15:25:30,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:25:30,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 15:25:30,850 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 15:25:30,850 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 15:25:30,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 15:25:30,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 15:25:30,850 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 15:25:30,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 15:25:30,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 15:25:30,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 15:25:30,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 [2024-11-08 15:25:31,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 15:25:31,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 15:25:31,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 15:25:31,066 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 15:25:31,066 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 15:25:31,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-11-08 15:25:32,267 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 15:25:32,408 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 15:25:32,409 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-11-08 15:25:32,415 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210ea425d/00cee027c19b4114a988e758097179f5/FLAG6674476e7 [2024-11-08 15:25:32,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210ea425d/00cee027c19b4114a988e758097179f5 [2024-11-08 15:25:32,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 15:25:32,428 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 15:25:32,430 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 15:25:32,430 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 15:25:32,433 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 15:25:32,434 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc30617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32, skipping insertion in model container [2024-11-08 15:25:32,435 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,452 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 15:25:32,588 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_hard2.c[1067,1080] [2024-11-08 15:25:32,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:25:32,620 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 15:25:32,631 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_hard2.c[1067,1080] [2024-11-08 15:25:32,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:25:32,675 INFO L204 MainTranslator]: Completed translation [2024-11-08 15:25:32,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32 WrapperNode [2024-11-08 15:25:32,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 15:25:32,676 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 15:25:32,676 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 15:25:32,677 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 15:25:32,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,709 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2024-11-08 15:25:32,709 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 15:25:32,710 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 15:25:32,710 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 15:25:32,710 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 15:25:32,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,739 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 8, 8, 6, 12, 5, 6, 9]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 0, 2, 1, 3, 1, 2, 3]. [2024-11-08 15:25:32,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,746 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 15:25:32,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 15:25:32,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 15:25:32,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 15:25:32,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (1/1) ... [2024-11-08 15:25:32,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:25:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:32,779 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) [2024-11-08 15:25:32,788 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 [2024-11-08 15:25:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 15:25:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2024-11-08 15:25:32,821 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2024-11-08 15:25:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 15:25:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 15:25:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 15:25:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 15:25:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 15:25:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-08 15:25:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-08 15:25:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-08 15:25:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 15:25:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 15:25:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 15:25:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 15:25:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 15:25:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 15:25:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-08 15:25:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-08 15:25:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-08 15:25:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2024-11-08 15:25:32,825 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2024-11-08 15:25:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 15:25:32,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 15:25:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 15:25:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 15:25:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 15:25:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 15:25:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 15:25:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-08 15:25:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-08 15:25:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-08 15:25:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 15:25:32,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 15:25:32,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 15:25:32,916 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 15:25:32,918 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 15:25:33,120 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-08 15:25:33,121 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 15:25:33,130 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 15:25:33,130 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 15:25:33,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:25:33 BoogieIcfgContainer [2024-11-08 15:25:33,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 15:25:33,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 15:25:33,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 15:25:33,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 15:25:33,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 03:25:32" (1/3) ... [2024-11-08 15:25:33,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b54c69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:25:33, skipping insertion in model container [2024-11-08 15:25:33,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:25:32" (2/3) ... [2024-11-08 15:25:33,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b54c69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:25:33, skipping insertion in model container [2024-11-08 15:25:33,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:25:33" (3/3) ... [2024-11-08 15:25:33,138 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2024-11-08 15:25:33,149 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 15:25:33,149 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 15:25:33,189 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 15:25:33,194 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;@15434069, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 15:25:33,194 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 15:25:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.28) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-08 15:25:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 15:25:33,202 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:33,203 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:33,203 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:33,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash -755414079, now seen corresponding path program 1 times [2024-11-08 15:25:33,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:33,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357273935] [2024-11-08 15:25:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:33,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:25:33,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:33,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357273935] [2024-11-08 15:25:33,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357273935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:33,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:33,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 15:25:33,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486361563] [2024-11-08 15:25:33,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:33,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:25:33,724 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.28) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2024-11-08 15:25:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:33,917 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2024-11-08 15:25:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 15:25:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 9 [2024-11-08 15:25:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:33,924 INFO L225 Difference]: With dead ends: 83 [2024-11-08 15:25:33,924 INFO L226 Difference]: Without dead ends: 41 [2024-11-08 15:25:33,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:25:33,929 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:33,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 246 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-08 15:25:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-08 15:25:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 15:25:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-11-08 15:25:33,956 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2024-11-08 15:25:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:33,956 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-11-08 15:25:33,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2024-11-08 15:25:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-11-08 15:25:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 15:25:33,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:33,957 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:33,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 15:25:33,957 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:33,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:33,958 INFO L85 PathProgramCache]: Analyzing trace with hash -682913725, now seen corresponding path program 1 times [2024-11-08 15:25:33,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:33,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423667272] [2024-11-08 15:25:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:33,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:34,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-08 15:25:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:25:34,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:34,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423667272] [2024-11-08 15:25:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423667272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:34,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:34,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 15:25:34,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781933142] [2024-11-08 15:25:34,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:34,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:25:34,178 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 15:25:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:34,300 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-11-08 15:25:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 15:25:34,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-08 15:25:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:34,302 INFO L225 Difference]: With dead ends: 47 [2024-11-08 15:25:34,302 INFO L226 Difference]: Without dead ends: 45 [2024-11-08 15:25:34,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:25:34,304 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:34,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 226 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-08 15:25:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-08 15:25:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 15:25:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-08 15:25:34,313 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 15 [2024-11-08 15:25:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:34,314 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-08 15:25:34,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 15:25:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-08 15:25:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 15:25:34,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:34,315 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:34,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 15:25:34,315 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:34,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:34,315 INFO L85 PathProgramCache]: Analyzing trace with hash -565463997, now seen corresponding path program 1 times [2024-11-08 15:25:34,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:34,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882974236] [2024-11-08 15:25:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:34,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:34,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138308915] [2024-11-08 15:25:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:34,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:34,346 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) [2024-11-08 15:25:34,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 15:25:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:34,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 15:25:34,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:34,499 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 [2024-11-08 15:25:34,509 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 11 treesize of output 7 [2024-11-08 15:25:34,513 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 [2024-11-08 15:25:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:25:34,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:25:34,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:34,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882974236] [2024-11-08 15:25:34,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:34,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138308915] [2024-11-08 15:25:34,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138308915] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:34,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:34,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-11-08 15:25:34,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879269787] [2024-11-08 15:25:34,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:34,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:34,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-08 15:25:34,915 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 15:25:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:35,068 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-11-08 15:25:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 15:25:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-08 15:25:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:35,072 INFO L225 Difference]: With dead ends: 56 [2024-11-08 15:25:35,072 INFO L226 Difference]: Without dead ends: 54 [2024-11-08 15:25:35,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-08 15:25:35,074 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:35,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 218 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-08 15:25:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2024-11-08 15:25:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 15:25:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-08 15:25:35,085 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 21 [2024-11-08 15:25:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:35,085 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-08 15:25:35,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 15:25:35,085 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-08 15:25:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 15:25:35,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:35,086 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:35,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 15:25:35,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:35,287 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:35,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1188632215, now seen corresponding path program 1 times [2024-11-08 15:25:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:35,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362785635] [2024-11-08 15:25:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:35,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:35,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117174213] [2024-11-08 15:25:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:35,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:35,324 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) [2024-11-08 15:25:35,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 15:25:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:35,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-08 15:25:35,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:35,422 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 [2024-11-08 15:25:35,423 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 11 treesize of output 7 [2024-11-08 15:25:35,428 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 [2024-11-08 15:25:35,432 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 [2024-11-08 15:25:35,713 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 [2024-11-08 15:25:35,716 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 [2024-11-08 15:25:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 15:25:35,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 15:25:35,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362785635] [2024-11-08 15:25:35,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117174213] [2024-11-08 15:25:35,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117174213] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:35,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:35,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-11-08 15:25:35,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048018839] [2024-11-08 15:25:35,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:35,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:35,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-08 15:25:35,887 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 15:25:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:36,045 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2024-11-08 15:25:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 15:25:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-08 15:25:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:36,047 INFO L225 Difference]: With dead ends: 69 [2024-11-08 15:25:36,047 INFO L226 Difference]: Without dead ends: 67 [2024-11-08 15:25:36,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-08 15:25:36,048 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:36,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 232 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-08 15:25:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-11-08 15:25:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-08 15:25:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-11-08 15:25:36,063 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 33 [2024-11-08 15:25:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:36,064 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-11-08 15:25:36,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 15:25:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-11-08 15:25:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 15:25:36,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:36,066 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:36,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 15:25:36,266 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 [2024-11-08 15:25:36,267 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:36,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:36,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2141026318, now seen corresponding path program 1 times [2024-11-08 15:25:36,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:36,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949770374] [2024-11-08 15:25:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:36,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:36,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793388768] [2024-11-08 15:25:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:36,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:36,319 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) [2024-11-08 15:25:36,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 15:25:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:36,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-08 15:25:36,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:36,435 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 15 treesize of output 11 [2024-11-08 15:25:36,441 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 [2024-11-08 15:25:36,446 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 [2024-11-08 15:25:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 15:25:36,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949770374] [2024-11-08 15:25:37,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793388768] [2024-11-08 15:25:37,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793388768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:37,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:37,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-08 15:25:37,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464475472] [2024-11-08 15:25:37,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:37,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 15:25:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:37,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 15:25:37,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-08 15:25:37,004 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 15:25:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:37,420 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2024-11-08 15:25:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 15:25:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2024-11-08 15:25:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:37,421 INFO L225 Difference]: With dead ends: 123 [2024-11-08 15:25:37,421 INFO L226 Difference]: Without dead ends: 121 [2024-11-08 15:25:37,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-11-08 15:25:37,425 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:37,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 128 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:25:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-08 15:25:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2024-11-08 15:25:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 22 states have call successors, (22), 16 states have call predecessors, (22), 19 states have return successors, (29), 21 states have call predecessors, (29), 20 states have call successors, (29) [2024-11-08 15:25:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2024-11-08 15:25:37,443 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 39 [2024-11-08 15:25:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:37,443 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2024-11-08 15:25:37,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-08 15:25:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2024-11-08 15:25:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 15:25:37,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:37,444 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:37,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 15:25:37,648 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 [2024-11-08 15:25:37,649 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:37,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash -684202243, now seen corresponding path program 1 times [2024-11-08 15:25:37,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:37,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542140718] [2024-11-08 15:25:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:37,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:37,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316340795] [2024-11-08 15:25:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:37,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:37,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:37,676 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) [2024-11-08 15:25:37,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 15:25:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:37,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-08 15:25:37,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:37,779 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 [2024-11-08 15:25:37,782 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 [2024-11-08 15:25:37,786 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 [2024-11-08 15:25:37,913 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 [2024-11-08 15:25:37,968 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 [2024-11-08 15:25:37,971 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 [2024-11-08 15:25:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 15:25:37,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542140718] [2024-11-08 15:25:42,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316340795] [2024-11-08 15:25:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316340795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:42,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:42,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-08 15:25:42,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420313245] [2024-11-08 15:25:42,514 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:42,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 15:25:42,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 15:25:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=85, Unknown=2, NotChecked=0, Total=110 [2024-11-08 15:25:42,515 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-08 15:25:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:42,851 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2024-11-08 15:25:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 15:25:42,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2024-11-08 15:25:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:42,853 INFO L225 Difference]: With dead ends: 137 [2024-11-08 15:25:42,853 INFO L226 Difference]: Without dead ends: 133 [2024-11-08 15:25:42,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=49, Invalid=159, Unknown=2, NotChecked=0, Total=210 [2024-11-08 15:25:42,854 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:42,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:25:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-08 15:25:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2024-11-08 15:25:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 87 states have internal predecessors, (93), 24 states have call successors, (24), 18 states have call predecessors, (24), 20 states have return successors, (30), 23 states have call predecessors, (30), 21 states have call successors, (30) [2024-11-08 15:25:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2024-11-08 15:25:42,885 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 49 [2024-11-08 15:25:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:42,886 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2024-11-08 15:25:42,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-08 15:25:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2024-11-08 15:25:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 15:25:42,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:42,887 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:42,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 15:25:43,087 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 [2024-11-08 15:25:43,088 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:43,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1621802541, now seen corresponding path program 1 times [2024-11-08 15:25:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:43,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874466286] [2024-11-08 15:25:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:43,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:25:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 15:25:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-08 15:25:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 15:25:43,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:43,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874466286] [2024-11-08 15:25:43,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874466286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:43,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 15:25:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069014044] [2024-11-08 15:25:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:43,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:43,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:25:43,299 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-08 15:25:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:43,490 INFO L93 Difference]: Finished difference Result 177 states and 204 transitions. [2024-11-08 15:25:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 15:25:43,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2024-11-08 15:25:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:43,492 INFO L225 Difference]: With dead ends: 177 [2024-11-08 15:25:43,493 INFO L226 Difference]: Without dead ends: 129 [2024-11-08 15:25:43,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:25:43,494 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:43,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 102 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-08 15:25:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2024-11-08 15:25:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 24 states have call successors, (24), 18 states have call predecessors, (24), 19 states have return successors, (26), 23 states have call predecessors, (26), 21 states have call successors, (26) [2024-11-08 15:25:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2024-11-08 15:25:43,523 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 50 [2024-11-08 15:25:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:43,523 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2024-11-08 15:25:43,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-08 15:25:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2024-11-08 15:25:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 15:25:43,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:43,524 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:43,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 15:25:43,525 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:43,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash 377968636, now seen corresponding path program 1 times [2024-11-08 15:25:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:43,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859758736] [2024-11-08 15:25:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:25:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-08 15:25:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-08 15:25:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-08 15:25:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:43,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859758736] [2024-11-08 15:25:43,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859758736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:43,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:43,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-08 15:25:43,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264209754] [2024-11-08 15:25:43,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:43,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 15:25:43,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 15:25:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-08 15:25:43,725 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-08 15:25:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:43,908 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2024-11-08 15:25:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 15:25:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2024-11-08 15:25:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:43,909 INFO L225 Difference]: With dead ends: 131 [2024-11-08 15:25:43,909 INFO L226 Difference]: Without dead ends: 99 [2024-11-08 15:25:43,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:25:43,910 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:43,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 72 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 15:25:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-08 15:25:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-11-08 15:25:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 66 states have internal predecessors, (70), 19 states have call successors, (19), 13 states have call predecessors, (19), 14 states have return successors, (21), 18 states have call predecessors, (21), 17 states have call successors, (21) [2024-11-08 15:25:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2024-11-08 15:25:43,927 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 55 [2024-11-08 15:25:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:43,928 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2024-11-08 15:25:43,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-08 15:25:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2024-11-08 15:25:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-08 15:25:43,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:43,929 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:43,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 15:25:43,930 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:43,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:43,930 INFO L85 PathProgramCache]: Analyzing trace with hash 380342299, now seen corresponding path program 1 times [2024-11-08 15:25:43,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:43,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477189666] [2024-11-08 15:25:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:43,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:43,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516209128] [2024-11-08 15:25:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:43,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:43,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:43,959 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) [2024-11-08 15:25:43,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 15:25:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:44,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-08 15:25:44,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:44,073 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 [2024-11-08 15:25:44,076 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 [2024-11-08 15:25:44,081 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 [2024-11-08 15:25:44,396 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 [2024-11-08 15:25:44,403 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 [2024-11-08 15:25:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-08 15:25:44,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:44,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477189666] [2024-11-08 15:25:44,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516209128] [2024-11-08 15:25:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516209128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:44,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:44,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-08 15:25:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654217216] [2024-11-08 15:25:44,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:44,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 15:25:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 15:25:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-08 15:25:44,957 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-08 15:25:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:45,586 INFO L93 Difference]: Finished difference Result 131 states and 149 transitions. [2024-11-08 15:25:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 15:25:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 63 [2024-11-08 15:25:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:45,587 INFO L225 Difference]: With dead ends: 131 [2024-11-08 15:25:45,587 INFO L226 Difference]: Without dead ends: 129 [2024-11-08 15:25:45,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-11-08 15:25:45,588 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:45,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 139 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 15:25:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-08 15:25:45,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2024-11-08 15:25:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 85 states have internal predecessors, (91), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (31), 24 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-08 15:25:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2024-11-08 15:25:45,604 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 63 [2024-11-08 15:25:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:45,604 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2024-11-08 15:25:45,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-08 15:25:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2024-11-08 15:25:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-08 15:25:45,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:45,605 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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] [2024-11-08 15:25:45,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 15:25:45,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:45,806 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:45,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash -941273112, now seen corresponding path program 2 times [2024-11-08 15:25:45,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:45,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814007233] [2024-11-08 15:25:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:45,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:45,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480357503] [2024-11-08 15:25:45,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:25:45,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:45,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:45,835 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) [2024-11-08 15:25:45,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 15:25:45,960 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:25:45,960 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:25:45,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-08 15:25:45,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:45,980 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 [2024-11-08 15:25:45,983 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 [2024-11-08 15:25:45,987 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 [2024-11-08 15:25:45,991 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 [2024-11-08 15:25:45,994 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 [2024-11-08 15:25:46,820 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 [2024-11-08 15:25:46,827 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 [2024-11-08 15:26:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 3 proven. 75 refuted. 33 times theorem prover too weak. 123 trivial. 0 not checked. [2024-11-08 15:26:07,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:26:08,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:26:08,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814007233] [2024-11-08 15:26:08,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:26:08,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480357503] [2024-11-08 15:26:08,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480357503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:26:08,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:26:08,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-08 15:26:08,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330269943] [2024-11-08 15:26:08,204 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:26:08,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 15:26:08,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:26:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 15:26:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=771, Unknown=4, NotChecked=0, Total=870 [2024-11-08 15:26:08,205 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 21 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-08 15:26:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:26:29,735 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2024-11-08 15:26:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 15:26:29,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) Word has length 87 [2024-11-08 15:26:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:26:29,737 INFO L225 Difference]: With dead ends: 161 [2024-11-08 15:26:29,737 INFO L226 Difference]: Without dead ends: 159 [2024-11-08 15:26:29,738 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=237, Invalid=1734, Unknown=9, NotChecked=0, Total=1980 [2024-11-08 15:26:29,738 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 15:26:29,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 234 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 751 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 15:26:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-08 15:26:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 129. [2024-11-08 15:26:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.108433734939759) internal successors, (92), 86 states have internal predecessors, (92), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (33), 25 states have call predecessors, (33), 21 states have call successors, (33) [2024-11-08 15:26:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2024-11-08 15:26:29,777 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 87 [2024-11-08 15:26:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:26:29,777 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2024-11-08 15:26:29,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.375) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-08 15:26:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2024-11-08 15:26:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-08 15:26:29,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:26:29,780 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:26:29,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 15:26:29,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:26:29,981 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:26:29,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:26:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2016753803, now seen corresponding path program 3 times [2024-11-08 15:26:29,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:26:29,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877583634] [2024-11-08 15:26:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:26:29,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:26:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:26:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592177625] [2024-11-08 15:26:30,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 15:26:30,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:26:30,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:26:30,023 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) [2024-11-08 15:26:30,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 15:26:30,184 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 15:26:30,185 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:26:30,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-11-08 15:26:30,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:26:30,200 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 [2024-11-08 15:26:30,214 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 [2024-11-08 15:26:30,218 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 [2024-11-08 15:26:30,223 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 11 treesize of output 7 [2024-11-08 15:26:31,313 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 [2024-11-08 15:26:31,324 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 [2024-11-08 15:26:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 27 proven. 118 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-11-08 15:26:31,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:26:33,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:26:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877583634] [2024-11-08 15:26:33,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:26:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592177625] [2024-11-08 15:26:33,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592177625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:26:33,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:26:33,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-08 15:26:33,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506575442] [2024-11-08 15:26:33,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:26:33,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 15:26:33,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:26:33,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 15:26:33,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2024-11-08 15:26:33,203 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 23 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 9 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-08 15:26:34,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:26:34,961 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2024-11-08 15:26:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 15:26:34,961 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 9 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 111 [2024-11-08 15:26:34,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:26:34,963 INFO L225 Difference]: With dead ends: 163 [2024-11-08 15:26:34,963 INFO L226 Difference]: Without dead ends: 161 [2024-11-08 15:26:34,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=266, Invalid=2086, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 15:26:34,964 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 15:26:34,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 324 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1104 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 15:26:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-08 15:26:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2024-11-08 15:26:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 87 states have internal predecessors, (93), 24 states have call successors, (24), 17 states have call predecessors, (24), 22 states have return successors, (35), 26 states have call predecessors, (35), 21 states have call successors, (35) [2024-11-08 15:26:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2024-11-08 15:26:34,988 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 111 [2024-11-08 15:26:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:26:34,988 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2024-11-08 15:26:34,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 9 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-08 15:26:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2024-11-08 15:26:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-08 15:26:34,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:26:34,989 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:26:35,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 15:26:35,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:26:35,190 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:26:35,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:26:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash 974653122, now seen corresponding path program 4 times [2024-11-08 15:26:35,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:26:35,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373055314] [2024-11-08 15:26:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:26:35,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:26:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:26:35,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292689664] [2024-11-08 15:26:35,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 15:26:35,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:26:35,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:26:35,245 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) [2024-11-08 15:26:35,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 15:26:35,432 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 15:26:35,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:26:35,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-08 15:26:35,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:26:39,974 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_40_to_50_0_~d.base_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~p.offset_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~B.base_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~p.base_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~B.offset_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~d.offset_BEFORE_CALL_9 Int)) (= (* (select (select |c_#memory_int#3| v_func_to_recursive_line_40_to_50_0_~B.base_BEFORE_CALL_9) v_func_to_recursive_line_40_to_50_0_~B.offset_BEFORE_CALL_9) (select (select |c_#memory_int#7| v_func_to_recursive_line_40_to_50_0_~p.base_BEFORE_CALL_9) v_func_to_recursive_line_40_to_50_0_~p.offset_BEFORE_CALL_9)) (select (select |c_#memory_int#4| v_func_to_recursive_line_40_to_50_0_~d.base_BEFORE_CALL_9) v_func_to_recursive_line_40_to_50_0_~d.offset_BEFORE_CALL_9))) is different from true [2024-11-08 15:26:40,007 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 25 treesize of output 17 [2024-11-08 15:26:40,010 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 21 treesize of output 13 [2024-11-08 15:26:40,019 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 [2024-11-08 15:26:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 128 proven. 13 refuted. 0 times theorem prover too weak. 482 trivial. 5 not checked. [2024-11-08 15:26:40,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:26:40,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:40,947 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 36 treesize of output 39 [2024-11-08 15:26:40,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:40,954 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 28 treesize of output 31 [2024-11-08 15:26:40,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:40,963 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 20 treesize of output 23 [2024-11-08 15:26:41,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,309 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 36 treesize of output 39 [2024-11-08 15:26:41,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,319 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 28 treesize of output 31 [2024-11-08 15:26:41,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,329 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 20 treesize of output 23 [2024-11-08 15:26:41,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,581 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 36 treesize of output 39 [2024-11-08 15:26:41,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,590 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 28 treesize of output 31 [2024-11-08 15:26:41,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,602 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 20 treesize of output 23 [2024-11-08 15:26:41,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,731 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 36 treesize of output 39 [2024-11-08 15:26:41,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,739 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 28 treesize of output 31 [2024-11-08 15:26:41,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,749 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 20 treesize of output 23 [2024-11-08 15:26:41,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,885 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 36 treesize of output 39 [2024-11-08 15:26:41,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,895 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 28 treesize of output 31 [2024-11-08 15:26:41,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:41,904 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 20 treesize of output 23 [2024-11-08 15:26:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 73 proven. 16 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2024-11-08 15:26:42,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:26:42,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373055314] [2024-11-08 15:26:42,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:26:42,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292689664] [2024-11-08 15:26:42,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292689664] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:26:42,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 15:26:42,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2024-11-08 15:26:42,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250594460] [2024-11-08 15:26:42,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 15:26:42,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 15:26:42,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:26:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 15:26:42,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=203, Unknown=1, NotChecked=28, Total=272 [2024-11-08 15:26:42,338 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-08 15:26:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:26:48,572 INFO L93 Difference]: Finished difference Result 153 states and 175 transitions. [2024-11-08 15:26:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 15:26:48,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 135 [2024-11-08 15:26:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:26:48,574 INFO L225 Difference]: With dead ends: 153 [2024-11-08 15:26:48,574 INFO L226 Difference]: Without dead ends: 151 [2024-11-08 15:26:48,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 250 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=79, Invalid=429, Unknown=2, NotChecked=42, Total=552 [2024-11-08 15:26:48,575 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:26:48,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 206 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 330 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2024-11-08 15:26:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-08 15:26:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2024-11-08 15:26:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 99 states have internal predecessors, (106), 26 states have call successors, (26), 20 states have call predecessors, (26), 25 states have return successors, (37), 28 states have call predecessors, (37), 23 states have call successors, (37) [2024-11-08 15:26:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2024-11-08 15:26:48,597 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 135 [2024-11-08 15:26:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:26:48,597 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2024-11-08 15:26:48,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-08 15:26:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2024-11-08 15:26:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-08 15:26:48,598 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:26:48,598 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:26:48,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 15:26:48,799 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,SelfDestructingSolverStorable11 [2024-11-08 15:26:48,799 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:26:48,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:26:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1965363914, now seen corresponding path program 1 times [2024-11-08 15:26:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:26:48,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287552920] [2024-11-08 15:26:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:26:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:26:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:48,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:26:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,024 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:26:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:26:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:26:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-08 15:26:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:26:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:26:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:26:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-08 15:26:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:26:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:26:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-08 15:26:49,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:26:49,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287552920] [2024-11-08 15:26:49,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287552920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:26:49,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714243527] [2024-11-08 15:26:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:26:49,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:26:49,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:26:49,131 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) [2024-11-08 15:26:49,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 15:26:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:49,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-08 15:26:49,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:26:49,251 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 [2024-11-08 15:26:49,332 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 25 treesize of output 13 [2024-11-08 15:26:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-08 15:26:49,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:26:49,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-08 15:26:49,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714243527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:26:49,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 15:26:49,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-11-08 15:26:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648972535] [2024-11-08 15:26:49,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 15:26:49,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 15:26:49,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:26:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 15:26:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-08 15:26:49,694 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 18 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-08 15:26:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:26:50,110 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2024-11-08 15:26:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 15:26:50,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 73 [2024-11-08 15:26:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:26:50,111 INFO L225 Difference]: With dead ends: 159 [2024-11-08 15:26:50,111 INFO L226 Difference]: Without dead ends: 137 [2024-11-08 15:26:50,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2024-11-08 15:26:50,112 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:26:50,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 97 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:26:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-08 15:26:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2024-11-08 15:26:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 77 states have internal predecessors, (82), 21 states have call successors, (21), 16 states have call predecessors, (21), 17 states have return successors, (24), 20 states have call predecessors, (24), 19 states have call successors, (24) [2024-11-08 15:26:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2024-11-08 15:26:50,134 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 73 [2024-11-08 15:26:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:26:50,135 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2024-11-08 15:26:50,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-08 15:26:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2024-11-08 15:26:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-08 15:26:50,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:26:50,135 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:26:50,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 15:26:50,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 15:26:50,336 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:26:50,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:26:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2140992512, now seen corresponding path program 1 times [2024-11-08 15:26:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:26:50,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044071900] [2024-11-08 15:26:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:26:50,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:26:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:26:50,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111632867] [2024-11-08 15:26:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:26:50,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:26:50,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:26:50,378 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) [2024-11-08 15:26:50,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 15:26:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:26:50,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-11-08 15:26:50,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:26:50,546 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 [2024-11-08 15:26:50,550 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 [2024-11-08 15:26:50,553 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 [2024-11-08 15:26:50,557 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 [2024-11-08 15:26:50,561 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 [2024-11-08 15:26:50,566 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 [2024-11-08 15:26:51,165 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 [2024-11-08 15:26:51,171 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 [2024-11-08 15:26:51,630 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 [2024-11-08 15:26:51,643 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 [2024-11-08 15:26:51,729 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-11-08 15:26:51,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 51 [2024-11-08 15:26:51,771 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-08 15:26:51,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-08 15:26:51,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:51,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 140 [2024-11-08 15:26:52,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:52,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 156 [2024-11-08 15:26:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 29 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-08 15:26:52,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:26:54,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:26:54,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044071900] [2024-11-08 15:26:54,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:26:54,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111632867] [2024-11-08 15:26:54,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111632867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:26:54,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:26:54,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-08 15:26:54,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832729354] [2024-11-08 15:26:54,346 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:26:54,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 15:26:54,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:26:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 15:26:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2024-11-08 15:26:54,347 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-08 15:26:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:26:55,722 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2024-11-08 15:26:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 15:26:55,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 74 [2024-11-08 15:26:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:26:55,724 INFO L225 Difference]: With dead ends: 156 [2024-11-08 15:26:55,724 INFO L226 Difference]: Without dead ends: 154 [2024-11-08 15:26:55,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 15:26:55,725 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 27 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 15:26:55,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 233 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 762 Invalid, 3 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 15:26:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-08 15:26:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2024-11-08 15:26:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 99 states have (on average 1.101010101010101) internal successors, (109), 101 states have internal predecessors, (109), 27 states have call successors, (27), 21 states have call predecessors, (27), 23 states have return successors, (36), 27 states have call predecessors, (36), 25 states have call successors, (36) [2024-11-08 15:26:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2024-11-08 15:26:55,752 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 74 [2024-11-08 15:26:55,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:26:55,752 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2024-11-08 15:26:55,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-08 15:26:55,753 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2024-11-08 15:26:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-08 15:26:55,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:26:55,753 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:26:55,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 15:26:55,954 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,SelfDestructingSolverStorable13 [2024-11-08 15:26:55,954 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:26:55,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:26:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1255319021, now seen corresponding path program 2 times [2024-11-08 15:26:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:26:55,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727299497] [2024-11-08 15:26:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:26:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:26:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:26:56,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515110780] [2024-11-08 15:26:56,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:26:56,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:26:56,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:26:56,013 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) [2024-11-08 15:26:56,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 15:26:56,191 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:26:56,192 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:26:56,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-11-08 15:26:56,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:26:56,206 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 [2024-11-08 15:26:56,210 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 [2024-11-08 15:26:56,214 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 [2024-11-08 15:26:56,216 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 [2024-11-08 15:26:56,221 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 [2024-11-08 15:26:56,226 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 [2024-11-08 15:26:57,028 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 [2024-11-08 15:26:57,033 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 [2024-11-08 15:26:57,459 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 [2024-11-08 15:26:57,468 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 [2024-11-08 15:26:57,520 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-08 15:26:57,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-08 15:26:57,560 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-11-08 15:26:57,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 51 [2024-11-08 15:26:57,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:57,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 136 [2024-11-08 15:26:57,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:26:57,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 160 [2024-11-08 15:26:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-08 15:26:57,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:06,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:06,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727299497] [2024-11-08 15:27:06,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:27:06,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515110780] [2024-11-08 15:27:06,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515110780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:06,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:27:06,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-08 15:27:06,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162645616] [2024-11-08 15:27:06,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:06,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 15:27:06,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 15:27:06,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=723, Unknown=1, NotChecked=0, Total=812 [2024-11-08 15:27:06,180 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-08 15:27:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:08,020 INFO L93 Difference]: Finished difference Result 192 states and 228 transitions. [2024-11-08 15:27:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 15:27:08,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 98 [2024-11-08 15:27:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:08,022 INFO L225 Difference]: With dead ends: 192 [2024-11-08 15:27:08,022 INFO L226 Difference]: Without dead ends: 190 [2024-11-08 15:27:08,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=135, Invalid=1054, Unknown=1, NotChecked=0, Total=1190 [2024-11-08 15:27:08,023 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:08,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 292 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 929 Invalid, 3 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 15:27:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-08 15:27:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 152. [2024-11-08 15:27:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 100 states have (on average 1.1) internal successors, (110), 102 states have internal predecessors, (110), 27 states have call successors, (27), 21 states have call predecessors, (27), 24 states have return successors, (38), 28 states have call predecessors, (38), 25 states have call successors, (38) [2024-11-08 15:27:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 175 transitions. [2024-11-08 15:27:08,055 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 175 transitions. Word has length 98 [2024-11-08 15:27:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:08,055 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 175 transitions. [2024-11-08 15:27:08,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-08 15:27:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 175 transitions. [2024-11-08 15:27:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-08 15:27:08,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:08,056 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:27:08,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 15:27:08,256 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,SelfDestructingSolverStorable14 [2024-11-08 15:27:08,257 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:08,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:08,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1423939686, now seen corresponding path program 3 times [2024-11-08 15:27:08,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:08,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565765580] [2024-11-08 15:27:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:08,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:27:08,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288624321] [2024-11-08 15:27:08,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 15:27:08,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:08,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:08,293 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) [2024-11-08 15:27:08,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 15:27:08,690 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 15:27:08,690 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:27:08,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 303 conjuncts are in the unsatisfiable core [2024-11-08 15:27:08,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:08,708 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 [2024-11-08 15:27:08,713 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 [2024-11-08 15:27:08,718 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 [2024-11-08 15:27:08,723 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 [2024-11-08 15:27:08,728 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 [2024-11-08 15:27:08,732 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