./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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_egcd2-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:29:25,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:29:25,722 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:29:25,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:29:25,729 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:29:25,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:29:25,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:29:25,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:29:25,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:29:25,766 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:29:25,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:29:25,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:29:25,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:29:25,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:29:25,769 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:29:25,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:29:25,770 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:29:25,770 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:29:25,770 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:29:25,771 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:29:25,771 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:29:25,771 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:29:25,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:29:25,772 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:29:25,772 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:29:25,773 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:29:25,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:29:25,773 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:29:25,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:29:25,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:29:25,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:29:25,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:29:25,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:29:25,775 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:29:25,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:29:25,776 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:29:25,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:29:25,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:29:25,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:29:25,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:29:25,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:29:25,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:29:25,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 [2024-11-18 14:29:26,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:29:26,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:29:26,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:29:26,065 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:29:26,066 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:29:26,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-11-18 14:29:27,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:29:27,787 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:29:27,787 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-11-18 14:29:27,797 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65d6b3c7/bf1c8678c1dc40cd8524a97090cecf62/FLAG34072ca47 [2024-11-18 14:29:27,812 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65d6b3c7/bf1c8678c1dc40cd8524a97090cecf62 [2024-11-18 14:29:27,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:29:27,816 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:29:27,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:29:27,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:29:27,825 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:29:27,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:29:27" (1/1) ... [2024-11-18 14:29:27,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393160d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:27, skipping insertion in model container [2024-11-18 14:29:27,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:29:27" (1/1) ... [2024-11-18 14:29:27,853 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:29:28,030 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_egcd2-ll.c[1037,1050] [2024-11-18 14:29:28,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:29:28,077 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:29:28,087 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_egcd2-ll.c[1037,1050] [2024-11-18 14:29:28,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:29:28,124 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:29:28,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28 WrapperNode [2024-11-18 14:29:28,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:29:28,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:29:28,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:29:28,126 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:29:28,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,161 INFO L138 Inliner]: procedures = 17, calls = 141, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 137 [2024-11-18 14:29:28,161 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:29:28,162 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:29:28,162 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:29:28,162 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:29:28,173 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,178 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,199 INFO L175 MemorySlicer]: Split 86 memory accesses to 13 slices as follows [2, 7, 7, 10, 7, 3, 3, 8, 5, 8, 5, 12, 9]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [0, 2, 3, 2, 3, 1, 1, 2, 2, 2, 2, 1, 1]. [2024-11-18 14:29:28,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,210 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,214 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,216 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:29:28,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:29:28,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:29:28,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:29:28,223 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (1/1) ... [2024-11-18 14:29:28,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:29:28,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:28,262 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) [2024-11-18 14:29:28,265 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 [2024-11-18 14:29:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:29:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-18 14:29:28,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-18 14:29:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:29:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 14:29:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 14:29:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-18 14:29:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-18 14:29:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-18 14:29:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-18 14:29:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-18 14:29:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-18 14:29:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-11-18 14:29:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-11-18 14:29:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-11-18 14:29:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-11-18 14:29:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 14:29:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 14:29:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 14:29:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 14:29:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-18 14:29:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-18 14:29:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-18 14:29:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-18 14:29:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-18 14:29:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-11-18 14:29:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-11-18 14:29:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-11-18 14:29:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-11-18 14:29:28,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-11-18 14:29:28,322 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2024-11-18 14:29:28,323 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2024-11-18 14:29:28,324 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2024-11-18 14:29:28,324 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2024-11-18 14:29:28,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:29:28,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:29:28,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 14:29:28,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 14:29:28,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 14:29:28,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-11-18 14:29:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 14:29:28,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 14:29:28,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 14:29:28,480 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:29:28,482 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:29:28,881 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-18 14:29:28,882 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:29:28,898 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:29:28,898 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 14:29:28,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:29:28 BoogieIcfgContainer [2024-11-18 14:29:28,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:29:28,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:29:28,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:29:28,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:29:28,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:29:27" (1/3) ... [2024-11-18 14:29:28,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60296f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:29:28, skipping insertion in model container [2024-11-18 14:29:28,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:29:28" (2/3) ... [2024-11-18 14:29:28,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60296f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:29:28, skipping insertion in model container [2024-11-18 14:29:28,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:29:28" (3/3) ... [2024-11-18 14:29:28,910 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2024-11-18 14:29:28,927 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:29:28,928 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:29:28,993 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:29:29,000 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;@3025642a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:29:29,001 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:29:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-18 14:29:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 14:29:29,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:29,012 INFO L215 NwaCegarLoop]: trace histogram [4, 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] [2024-11-18 14:29:29,013 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:29,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1681658183, now seen corresponding path program 1 times [2024-11-18 14:29:29,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:29,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447320247] [2024-11-18 14:29:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:29,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:29:29,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:29,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447320247] [2024-11-18 14:29:29,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447320247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:29,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078136107] [2024-11-18 14:29:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:29,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:29,406 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) [2024-11-18 14:29:29,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:29:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:29,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-18 14:29:29,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:29:29,686 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 14:29:29,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078136107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:29:29,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:29:29,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-18 14:29:29,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185161881] [2024-11-18 14:29:29,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:29:29,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 14:29:29,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 14:29:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 14:29:29,724 INFO L87 Difference]: Start difference. First operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-18 14:29:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:29,752 INFO L93 Difference]: Finished difference Result 99 states and 142 transitions. [2024-11-18 14:29:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 14:29:29,754 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-11-18 14:29:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:29,765 INFO L225 Difference]: With dead ends: 99 [2024-11-18 14:29:29,766 INFO L226 Difference]: Without dead ends: 47 [2024-11-18 14:29:29,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 14:29:29,776 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:29,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:29:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-18 14:29:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-18 14:29:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 31 states have internal predecessors, (31), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-18 14:29:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2024-11-18 14:29:29,829 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 37 [2024-11-18 14:29:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:29,830 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2024-11-18 14:29:29,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-18 14:29:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2024-11-18 14:29:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 14:29:29,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:29,833 INFO L215 NwaCegarLoop]: trace histogram [4, 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] [2024-11-18 14:29:29,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 14:29:30,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-18 14:29:30,034 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:30,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1619629489, now seen corresponding path program 1 times [2024-11-18 14:29:30,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:30,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624196750] [2024-11-18 14:29:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:30,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:29:30,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043834482] [2024-11-18 14:29:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:30,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:30,193 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) [2024-11-18 14:29:30,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:29:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:30,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-18 14:29:30,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:30,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 14:29:30,499 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 11 treesize of output 7 [2024-11-18 14:29:30,510 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 [2024-11-18 14:29:30,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:29:30,600 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 [2024-11-18 14:29:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 14:29:30,649 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 14:29:30,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624196750] [2024-11-18 14:29:30,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:29:30,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043834482] [2024-11-18 14:29:30,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043834482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:29:30,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:29:30,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-18 14:29:30,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131453852] [2024-11-18 14:29:30,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:29:30,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 14:29:30,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 14:29:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-18 14:29:30,654 INFO L87 Difference]: Start difference. First operand 47 states and 58 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 14:29:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:30,978 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-11-18 14:29:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:29:30,980 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-11-18 14:29:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:30,981 INFO L225 Difference]: With dead ends: 67 [2024-11-18 14:29:30,981 INFO L226 Difference]: Without dead ends: 65 [2024-11-18 14:29:30,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:29:30,983 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:30,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 320 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:29:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-18 14:29:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2024-11-18 14:29:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-11-18 14:29:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2024-11-18 14:29:31,008 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2024-11-18 14:29:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:31,009 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2024-11-18 14:29:31,009 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-18 14:29:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2024-11-18 14:29:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 14:29:31,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:31,012 INFO L215 NwaCegarLoop]: trace histogram [4, 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] [2024-11-18 14:29:31,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 14:29:31,212 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,SelfDestructingSolverStorable1 [2024-11-18 14:29:31,213 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:31,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash 509898258, now seen corresponding path program 1 times [2024-11-18 14:29:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:31,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203528023] [2024-11-18 14:29:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:31,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 14:29:31,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:31,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203528023] [2024-11-18 14:29:31,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203528023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:31,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481757129] [2024-11-18 14:29:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:31,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:31,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:31,720 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) [2024-11-18 14:29:31,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:29:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:31,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-18 14:29:31,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:31,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-18 14:29:31,986 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 [2024-11-18 14:29:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:29:32,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 14:29:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481757129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:32,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:29:32,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2024-11-18 14:29:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42944279] [2024-11-18 14:29:32,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:32,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-18 14:29:32,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:32,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-18 14:29:32,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-18 14:29:32,585 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 24 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (14), 5 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-18 14:29:37,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-18 14:29:41,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 14:29:45,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 14:29:49,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-18 14:29:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:49,572 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2024-11-18 14:29:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 14:29:49,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (14), 5 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 37 [2024-11-18 14:29:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:49,579 INFO L225 Difference]: With dead ends: 124 [2024-11-18 14:29:49,579 INFO L226 Difference]: Without dead ends: 112 [2024-11-18 14:29:49,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 14:29:49,582 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 111 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 80 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:49,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 103 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 527 Invalid, 7 Unknown, 0 Unchecked, 16.7s Time] [2024-11-18 14:29:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-18 14:29:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2024-11-18 14:29:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 72 states have internal predecessors, (75), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2024-11-18 14:29:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2024-11-18 14:29:49,619 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 37 [2024-11-18 14:29:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:49,619 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2024-11-18 14:29:49,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (14), 5 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-18 14:29:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2024-11-18 14:29:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-18 14:29:49,620 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:49,621 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2024-11-18 14:29:49,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:29:49,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:49,822 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:49,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash -257668564, now seen corresponding path program 1 times [2024-11-18 14:29:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797853423] [2024-11-18 14:29:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:29:49,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710100893] [2024-11-18 14:29:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:49,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:49,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:49,918 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) [2024-11-18 14:29:49,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:29:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:50,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-18 14:29:50,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:50,141 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 [2024-11-18 14:29:50,153 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 [2024-11-18 14:29:50,160 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 [2024-11-18 14:29:50,167 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 [2024-11-18 14:29:50,605 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 [2024-11-18 14:29:50,609 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 [2024-11-18 14:29:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 14:29:50,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:50,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:50,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797853423] [2024-11-18 14:29:50,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:29:50,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710100893] [2024-11-18 14:29:50,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710100893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:50,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:29:50,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-18 14:29:50,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587078631] [2024-11-18 14:29:50,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:50,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 14:29:50,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 14:29:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-18 14:29:50,784 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:29:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:51,293 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2024-11-18 14:29:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:29:51,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2024-11-18 14:29:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:51,295 INFO L225 Difference]: With dead ends: 118 [2024-11-18 14:29:51,295 INFO L226 Difference]: Without dead ends: 116 [2024-11-18 14:29:51,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:29:51,296 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 24 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:51,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 337 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:29:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-18 14:29:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-11-18 14:29:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 75 states have internal predecessors, (78), 28 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2024-11-18 14:29:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2024-11-18 14:29:51,328 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 43 [2024-11-18 14:29:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:51,332 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2024-11-18 14:29:51,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:29:51,332 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2024-11-18 14:29:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-18 14:29:51,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:51,334 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1] [2024-11-18 14:29:51,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 14:29:51,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:51,535 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:51,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:51,535 INFO L85 PathProgramCache]: Analyzing trace with hash 670488903, now seen corresponding path program 1 times [2024-11-18 14:29:51,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:51,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497781457] [2024-11-18 14:29:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:51,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:29:51,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452915520] [2024-11-18 14:29:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:51,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:51,587 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) [2024-11-18 14:29:51,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:29:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:51,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-18 14:29:51,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:51,807 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 [2024-11-18 14:29:51,812 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 [2024-11-18 14:29:51,817 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 [2024-11-18 14:29:51,823 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 [2024-11-18 14:29:52,293 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 [2024-11-18 14:29:52,300 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 [2024-11-18 14:29:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 14:29:52,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:52,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:52,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497781457] [2024-11-18 14:29:52,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:29:52,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452915520] [2024-11-18 14:29:52,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452915520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:52,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:29:52,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-18 14:29:52,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722039393] [2024-11-18 14:29:52,480 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:52,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 14:29:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 14:29:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-18 14:29:52,482 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 14:29:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:52,935 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2024-11-18 14:29:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:29:52,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (9), 5 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 49 [2024-11-18 14:29:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:52,937 INFO L225 Difference]: With dead ends: 122 [2024-11-18 14:29:52,937 INFO L226 Difference]: Without dead ends: 120 [2024-11-18 14:29:52,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:29:52,938 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:52,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 301 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:29:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-18 14:29:52,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-11-18 14:29:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 78 states have internal predecessors, (81), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2024-11-18 14:29:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2024-11-18 14:29:52,957 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 49 [2024-11-18 14:29:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:52,957 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2024-11-18 14:29:52,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 14:29:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2024-11-18 14:29:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-18 14:29:52,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:52,959 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:52,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 14:29:53,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:53,160 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:53,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1286680864, now seen corresponding path program 1 times [2024-11-18 14:29:53,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:53,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817450239] [2024-11-18 14:29:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:53,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:29:53,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876855463] [2024-11-18 14:29:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:53,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:53,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:53,225 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) [2024-11-18 14:29:53,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:29:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:53,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-18 14:29:53,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:53,464 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 [2024-11-18 14:29:53,469 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 [2024-11-18 14:29:53,474 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 21 treesize of output 17 [2024-11-18 14:29:53,480 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 [2024-11-18 14:29:53,488 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 [2024-11-18 14:29:54,331 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 [2024-11-18 14:29:54,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-18 14:29:54,345 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 35 treesize of output 15 [2024-11-18 14:29:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-18 14:29:54,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:54,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817450239] [2024-11-18 14:29:54,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:29:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876855463] [2024-11-18 14:29:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876855463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:54,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:29:54,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-18 14:29:54,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410319866] [2024-11-18 14:29:54,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:54,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 14:29:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 14:29:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-18 14:29:54,599 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 14:29:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:55,142 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2024-11-18 14:29:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:29:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2024-11-18 14:29:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:55,144 INFO L225 Difference]: With dead ends: 126 [2024-11-18 14:29:55,144 INFO L226 Difference]: Without dead ends: 124 [2024-11-18 14:29:55,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:29:55,146 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:55,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 293 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:29:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-18 14:29:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2024-11-18 14:29:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 81 states have internal predecessors, (84), 28 states have call successors, (28), 15 states have call predecessors, (28), 15 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2024-11-18 14:29:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2024-11-18 14:29:55,172 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 55 [2024-11-18 14:29:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:55,172 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2024-11-18 14:29:55,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 14:29:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2024-11-18 14:29:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-18 14:29:55,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:55,174 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:55,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 14:29:55,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:55,375 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:55,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1519499309, now seen corresponding path program 1 times [2024-11-18 14:29:55,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:55,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344650218] [2024-11-18 14:29:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:55,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:29:55,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547930942] [2024-11-18 14:29:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:55,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:55,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:55,471 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) [2024-11-18 14:29:55,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:29:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:55,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-18 14:29:55,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:55,734 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 [2024-11-18 14:29:55,743 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 [2024-11-18 14:29:55,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-18 14:29:55,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 14:29:55,753 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 [2024-11-18 14:29:55,758 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 [2024-11-18 14:29:56,019 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 [2024-11-18 14:29:56,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-11-18 14:29:56,078 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 [2024-11-18 14:29:56,082 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 [2024-11-18 14:29:56,095 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 [2024-11-18 14:29:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-18 14:29:56,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-18 14:29:56,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344650218] [2024-11-18 14:29:56,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:29:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547930942] [2024-11-18 14:29:56,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547930942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:56,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 14:29:56,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-18 14:29:56,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191290612] [2024-11-18 14:29:56,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:56,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 14:29:56,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 14:29:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:29:56,331 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand has 15 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 8 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-18 14:29:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:56,948 INFO L93 Difference]: Finished difference Result 186 states and 216 transitions. [2024-11-18 14:29:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-18 14:29:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 8 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 65 [2024-11-18 14:29:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:56,951 INFO L225 Difference]: With dead ends: 186 [2024-11-18 14:29:56,951 INFO L226 Difference]: Without dead ends: 184 [2024-11-18 14:29:56,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-18 14:29:56,952 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 50 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:56,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 417 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:29:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-18 14:29:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 177. [2024-11-18 14:29:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 112 states have (on average 1.0803571428571428) internal successors, (121), 118 states have internal predecessors, (121), 38 states have call successors, (38), 22 states have call predecessors, (38), 26 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2024-11-18 14:29:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 207 transitions. [2024-11-18 14:29:57,014 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 207 transitions. Word has length 65 [2024-11-18 14:29:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:57,014 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 207 transitions. [2024-11-18 14:29:57,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 8 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-18 14:29:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 207 transitions. [2024-11-18 14:29:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-18 14:29:57,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:57,016 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:57,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 14:29:57,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:57,217 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:57,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash 49318782, now seen corresponding path program 1 times [2024-11-18 14:29:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:57,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969690540] [2024-11-18 14:29:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:57,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-18 14:29:58,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:58,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969690540] [2024-11-18 14:29:58,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969690540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:58,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429518878] [2024-11-18 14:29:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:29:58,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:58,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:58,251 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) [2024-11-18 14:29:58,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:29:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:58,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-18 14:29:58,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:58,587 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 [2024-11-18 14:29:58,592 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 [2024-11-18 14:29:58,771 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 [2024-11-18 14:29:58,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-18 14:29:58,822 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 [2024-11-18 14:29:58,928 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 [2024-11-18 14:29:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 14:29:58,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:59,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429518878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:59,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 14:29:59,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 28 [2024-11-18 14:29:59,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440062004] [2024-11-18 14:29:59,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:59,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 14:29:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:59,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 14:29:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1084, Unknown=0, NotChecked=0, Total=1190 [2024-11-18 14:29:59,400 INFO L87 Difference]: Start difference. First operand 177 states and 207 transitions. Second operand has 28 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 26 states have internal predecessors, (55), 12 states have call successors, (19), 7 states have call predecessors, (19), 9 states have return successors, (18), 10 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-18 14:30:03,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 14:30:08,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-18 14:30:12,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 14:30:16,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-18 14:30:21,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 14:30:25,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-18 14:30:29,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-18 14:30:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:30:29,232 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2024-11-18 14:30:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-18 14:30:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 26 states have internal predecessors, (55), 12 states have call successors, (19), 7 states have call predecessors, (19), 9 states have return successors, (18), 10 states have call predecessors, (18), 11 states have call successors, (18) Word has length 74 [2024-11-18 14:30:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:30:29,234 INFO L225 Difference]: With dead ends: 201 [2024-11-18 14:30:29,234 INFO L226 Difference]: Without dead ends: 191 [2024-11-18 14:30:29,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=430, Invalid=3110, Unknown=0, NotChecked=0, Total=3540 [2024-11-18 14:30:29,236 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 154 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:30:29,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 151 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1155 Invalid, 7 Unknown, 0 Unchecked, 29.1s Time] [2024-11-18 14:30:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-18 14:30:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2024-11-18 14:30:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 119 states have (on average 1.0756302521008403) internal successors, (128), 125 states have internal predecessors, (128), 39 states have call successors, (39), 23 states have call predecessors, (39), 30 states have return successors, (54), 40 states have call predecessors, (54), 38 states have call successors, (54) [2024-11-18 14:30:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 221 transitions. [2024-11-18 14:30:29,274 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 221 transitions. Word has length 74 [2024-11-18 14:30:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:30:29,274 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 221 transitions. [2024-11-18 14:30:29,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 26 states have internal predecessors, (55), 12 states have call successors, (19), 7 states have call predecessors, (19), 9 states have return successors, (18), 10 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-18 14:30:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 221 transitions. [2024-11-18 14:30:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-18 14:30:29,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:30:29,276 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2024-11-18 14:30:29,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 14:30:29,480 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,SelfDestructingSolverStorable7 [2024-11-18 14:30:29,481 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:30:29,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:30:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1950907224, now seen corresponding path program 1 times [2024-11-18 14:30:29,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:30:29,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706619112] [2024-11-18 14:30:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:30:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:30:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:30:29,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7181548] [2024-11-18 14:30:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:30:29,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:30:29,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:30:29,611 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) [2024-11-18 14:30:29,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:30:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:30:29,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 213 conjuncts are in the unsatisfiable core [2024-11-18 14:30:29,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:30:29,920 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 [2024-11-18 14:30:29,987 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 [2024-11-18 14:30:29,992 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 [2024-11-18 14:30:30,001 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 [2024-11-18 14:30:30,005 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 [2024-11-18 14:30:30,011 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 [2024-11-18 14:30:30,411 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 [2024-11-18 14:30:30,470 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 [2024-11-18 14:30:31,324 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 [2024-11-18 14:30:31,328 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 [2024-11-18 14:30:31,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:30:31,347 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 51 treesize of output 47 [2024-11-18 14:30:31,398 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-11-18 14:30:31,398 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 41 treesize of output 52 [2024-11-18 14:30:31,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2024-11-18 14:30:31,809 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 [2024-11-18 14:30:31,811 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 22 treesize of output 10 [2024-11-18 14:30:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 14:30:31,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:30:32,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:30:32,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706619112] [2024-11-18 14:30:32,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:30:32,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7181548] [2024-11-18 14:30:32,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7181548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:30:32,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:30:32,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-11-18 14:30:32,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821457777] [2024-11-18 14:30:32,088 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:30:32,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-18 14:30:32,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:30:32,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-18 14:30:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-11-18 14:30:32,089 INFO L87 Difference]: Start difference. First operand 189 states and 221 transitions. Second operand has 25 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-18 14:30:36,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 14:30:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:30:38,297 INFO L93 Difference]: Finished difference Result 277 states and 325 transitions. [2024-11-18 14:30:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-18 14:30:38,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 78 [2024-11-18 14:30:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:30:38,300 INFO L225 Difference]: With dead ends: 277 [2024-11-18 14:30:38,300 INFO L226 Difference]: Without dead ends: 271 [2024-11-18 14:30:38,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=261, Invalid=2391, Unknown=0, NotChecked=0, Total=2652 [2024-11-18 14:30:38,302 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 134 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:30:38,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 379 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 859 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-11-18 14:30:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-18 14:30:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2024-11-18 14:30:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 168 states have (on average 1.0833333333333333) internal successors, (182), 176 states have internal predecessors, (182), 55 states have call successors, (55), 33 states have call predecessors, (55), 42 states have return successors, (77), 56 states have call predecessors, (77), 54 states have call successors, (77) [2024-11-18 14:30:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 314 transitions. [2024-11-18 14:30:38,369 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 314 transitions. Word has length 78 [2024-11-18 14:30:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:30:38,370 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 314 transitions. [2024-11-18 14:30:38,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-18 14:30:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 314 transitions. [2024-11-18 14:30:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-18 14:30:38,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:30:38,372 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:30:38,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 14:30:38,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:30:38,573 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:30:38,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:30:38,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1987806861, now seen corresponding path program 2 times [2024-11-18 14:30:38,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:30:38,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138920909] [2024-11-18 14:30:38,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:30:38,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:30:38,650 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:30:38,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 14:30:38,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474530059] [2024-11-18 14:30:38,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:30:38,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:30:38,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:30:38,657 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) [2024-11-18 14:30:38,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:30:39,088 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:30:39,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:30:39,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 291 conjuncts are in the unsatisfiable core [2024-11-18 14:30:39,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:30:39,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-18 14:30:39,117 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 [2024-11-18 14:30:39,120 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 [2024-11-18 14:30:39,229 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 [2024-11-18 14:30:39,235 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 [2024-11-18 14:30:39,241 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 [2024-11-18 14:30:39,247 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 [2024-11-18 14:30:39,256 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 [2024-11-18 14:30:39,266 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 [2024-11-18 14:30:39,972 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 [2024-11-18 14:30:39,995 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 [2024-11-18 14:30:40,093 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 [2024-11-18 14:30:41,793 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-18 14:30:41,794 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 15 treesize of output 7 [2024-11-18 14:30:41,819 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-18 14:30:41,819 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 [2024-11-18 14:30:41,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-11-18 14:30:41,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:30:41,856 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 51 treesize of output 47 [2024-11-18 14:30:41,912 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-11-18 14:30:41,912 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 51 treesize of output 62 [2024-11-18 14:30:42,004 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-18 14:30:42,005 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 [2024-11-18 14:30:45,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:30:45,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 97 [2024-11-18 14:30:45,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:30:45,487 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 71 treesize of output 111 [2024-11-18 14:30:45,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 14:30:45,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 81 [2024-11-18 14:30:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-18 14:30:45,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:30:57,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:30:57,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138920909] [2024-11-18 14:30:57,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:30:57,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474530059] [2024-11-18 14:30:57,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474530059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:30:57,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:30:57,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-11-18 14:30:57,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76860898] [2024-11-18 14:30:57,809 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:30:57,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-18 14:30:57,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:30:57,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-18 14:30:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1558, Unknown=1, NotChecked=0, Total=1722 [2024-11-18 14:30:57,811 INFO L87 Difference]: Start difference. First operand 266 states and 314 transitions. Second operand has 30 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 21 states have internal predecessors, (43), 8 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11)