./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test1-2.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test1-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 26a58d7d603dc7e351440fbc8be1a2e69d6c8a245d05ca1fdcdd97a1f744081c --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:11:31,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:11:31,758 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:11:31,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:11:31,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:11:31,776 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:11:31,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:11:31,777 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:11:31,777 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:11:31,777 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:11:31,778 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:11:31,778 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:11:31,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:11:31,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:11:31,779 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:11:31,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:11:31,779 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:11:31,780 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:11:31,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:11:31,780 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:11:31,780 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:11:31,781 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:11:31,781 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:11:31,781 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:11:31,782 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:11:31,782 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:11:31,782 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:11:31,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:11:31,783 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:11:31,783 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:11:31,783 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:11:31,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:11:31,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:11:31,784 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:11:31,784 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:11:31,784 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:11:31,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:11:31,784 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:11:31,785 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:11:31,785 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:11:31,785 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:11:31,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:11:31,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26a58d7d603dc7e351440fbc8be1a2e69d6c8a245d05ca1fdcdd97a1f744081c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:11:31,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:11:31,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:11:31,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:11:31,970 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:11:31,970 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:11:31,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test1-2.i [2023-11-22 18:11:33,076 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:11:33,312 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:11:33,328 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test1-2.i [2023-11-22 18:11:33,349 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7308d641/1780829c31504107aab8fc8832e27535/FLAG1d47b654d [2023-11-22 18:11:33,365 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7308d641/1780829c31504107aab8fc8832e27535 [2023-11-22 18:11:33,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:11:33,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:11:33,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:11:33,372 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:11:33,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:11:33,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:33,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a05789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33, skipping insertion in model container [2023-11-22 18:11:33,378 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:33,428 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:11:33,592 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 18:11:33,666 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test1-2.i[33510,33523] [2023-11-22 18:11:33,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:11:33,723 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:11:33,734 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 18:11:33,773 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test1-2.i[33510,33523] [2023-11-22 18:11:33,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:11:33,913 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 18:11:33,920 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:11:33,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33 WrapperNode [2023-11-22 18:11:33,921 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:11:33,922 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:11:33,922 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:11:33,923 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:11:33,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:33,967 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,008 INFO L138 Inliner]: procedures = 178, calls = 228, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 916 [2023-11-22 18:11:34,009 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:11:34,010 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:11:34,010 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:11:34,010 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:11:34,025 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,046 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,103 INFO L189 HeapSplitter]: Split 211 memory accesses to 4 slices as follows [2, 5, 0, 204] [2023-11-22 18:11:34,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,131 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:11:34,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:11:34,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:11:34,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:11:34,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (1/1) ... [2023-11-22 18:11:34,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:11:34,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:34,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 18:11:34,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 18:11:34,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:11:34,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:11:34,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:11:34,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-22 18:11:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:11:34,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:11:34,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:11:34,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-22 18:11:34,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-22 18:11:34,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-22 18:11:34,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-22 18:11:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-22 18:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-22 18:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-22 18:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-22 18:11:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-22 18:11:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 18:11:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:11:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:11:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-22 18:11:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-22 18:11:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-22 18:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-22 18:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-22 18:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-22 18:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-22 18:11:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-22 18:11:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:11:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:11:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:11:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:11:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 18:11:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:11:34,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:11:34,500 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:11:34,502 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:11:35,194 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:11:35,230 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:11:35,230 INFO L309 CfgBuilder]: Removed 40 assume(true) statements. [2023-11-22 18:11:35,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:11:35 BoogieIcfgContainer [2023-11-22 18:11:35,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:11:35,232 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:11:35,232 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:11:35,235 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:11:35,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:11:33" (1/3) ... [2023-11-22 18:11:35,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c1ac05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:11:35, skipping insertion in model container [2023-11-22 18:11:35,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:11:33" (2/3) ... [2023-11-22 18:11:35,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c1ac05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:11:35, skipping insertion in model container [2023-11-22 18:11:35,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:11:35" (3/3) ... [2023-11-22 18:11:35,238 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_nondet_test1-2.i [2023-11-22 18:11:35,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:11:35,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:11:35,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:11:35,309 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@213be1b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:11:35,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:11:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 217 states, 211 states have (on average 1.6919431279620853) internal successors, (357), 212 states have internal predecessors, (357), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 18:11:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-22 18:11:35,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:35,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:35,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:35,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash 913711251, now seen corresponding path program 1 times [2023-11-22 18:11:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:35,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338746849] [2023-11-22 18:11:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:35,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:11:35,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:35,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338746849] [2023-11-22 18:11:35,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338746849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:11:35,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:11:35,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:11:35,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392548646] [2023-11-22 18:11:35,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:11:35,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 18:11:35,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 18:11:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 18:11:35,482 INFO L87 Difference]: Start difference. First operand has 217 states, 211 states have (on average 1.6919431279620853) internal successors, (357), 212 states have internal predecessors, (357), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:35,566 INFO L93 Difference]: Finished difference Result 433 states and 725 transitions. [2023-11-22 18:11:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 18:11:35,568 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-22 18:11:35,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:35,578 INFO L225 Difference]: With dead ends: 433 [2023-11-22 18:11:35,578 INFO L226 Difference]: Without dead ends: 182 [2023-11-22 18:11:35,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 18:11:35,584 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:35,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 313 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-22 18:11:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-22 18:11:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.4915254237288136) internal successors, (264), 177 states have internal predecessors, (264), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 18:11:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 270 transitions. [2023-11-22 18:11:35,649 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 270 transitions. Word has length 7 [2023-11-22 18:11:35,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:35,650 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 270 transitions. [2023-11-22 18:11:35,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 270 transitions. [2023-11-22 18:11:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-22 18:11:35,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:35,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:35,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:11:35,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:35,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1975963068, now seen corresponding path program 1 times [2023-11-22 18:11:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:35,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756931831] [2023-11-22 18:11:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:11:35,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:35,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756931831] [2023-11-22 18:11:35,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756931831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:11:35,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:11:35,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:11:35,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774655734] [2023-11-22 18:11:35,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:11:35,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:11:35,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:11:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:11:35,727 INFO L87 Difference]: Start difference. First operand 182 states and 270 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:35,750 INFO L93 Difference]: Finished difference Result 360 states and 536 transitions. [2023-11-22 18:11:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:11:35,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-22 18:11:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:35,752 INFO L225 Difference]: With dead ends: 360 [2023-11-22 18:11:35,753 INFO L226 Difference]: Without dead ends: 354 [2023-11-22 18:11:35,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:11:35,754 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 252 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:35,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 527 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-22 18:11:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 183. [2023-11-22 18:11:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4887640449438202) internal successors, (265), 178 states have internal predecessors, (265), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 18:11:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 271 transitions. [2023-11-22 18:11:35,763 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 271 transitions. Word has length 7 [2023-11-22 18:11:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:35,764 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 271 transitions. [2023-11-22 18:11:35,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 271 transitions. [2023-11-22 18:11:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-22 18:11:35,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:35,767 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-22 18:11:35,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 18:11:35,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:35,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash -999422523, now seen corresponding path program 1 times [2023-11-22 18:11:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:35,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572402213] [2023-11-22 18:11:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:35,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:11:35,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:35,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572402213] [2023-11-22 18:11:35,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572402213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:11:35,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:11:35,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 18:11:35,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423842225] [2023-11-22 18:11:35,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:11:35,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:11:35,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:35,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:11:35,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:11:35,972 INFO L87 Difference]: Start difference. First operand 183 states and 271 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:36,043 INFO L93 Difference]: Finished difference Result 368 states and 544 transitions. [2023-11-22 18:11:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 18:11:36,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-11-22 18:11:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:36,045 INFO L225 Difference]: With dead ends: 368 [2023-11-22 18:11:36,045 INFO L226 Difference]: Without dead ends: 187 [2023-11-22 18:11:36,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:11:36,047 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 165 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:36,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 568 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:11:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-22 18:11:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2023-11-22 18:11:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.449438202247191) internal successors, (258), 178 states have internal predecessors, (258), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 18:11:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 264 transitions. [2023-11-22 18:11:36,065 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 264 transitions. Word has length 82 [2023-11-22 18:11:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:36,065 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 264 transitions. [2023-11-22 18:11:36,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 264 transitions. [2023-11-22 18:11:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-22 18:11:36,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:36,067 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-22 18:11:36,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 18:11:36,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:36,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:36,068 INFO L85 PathProgramCache]: Analyzing trace with hash 252549713, now seen corresponding path program 1 times [2023-11-22 18:11:36,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:36,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045000828] [2023-11-22 18:11:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:36,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:11:36,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:36,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045000828] [2023-11-22 18:11:36,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045000828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:11:36,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:11:36,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:11:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070405598] [2023-11-22 18:11:36,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:11:36,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:11:36,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:11:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:11:36,189 INFO L87 Difference]: Start difference. First operand 183 states and 264 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:36,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:36,222 INFO L93 Difference]: Finished difference Result 475 states and 697 transitions. [2023-11-22 18:11:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:11:36,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-11-22 18:11:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:36,238 INFO L225 Difference]: With dead ends: 475 [2023-11-22 18:11:36,238 INFO L226 Difference]: Without dead ends: 294 [2023-11-22 18:11:36,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:11:36,239 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 123 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:36,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 503 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:11:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-22 18:11:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2023-11-22 18:11:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 289 states have (on average 1.480968858131488) internal successors, (428), 289 states have internal predecessors, (428), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 18:11:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 434 transitions. [2023-11-22 18:11:36,248 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 434 transitions. Word has length 82 [2023-11-22 18:11:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:36,249 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 434 transitions. [2023-11-22 18:11:36,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:11:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 434 transitions. [2023-11-22 18:11:36,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-22 18:11:36,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:36,251 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1] [2023-11-22 18:11:36,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 18:11:36,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:36,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:36,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1323752678, now seen corresponding path program 1 times [2023-11-22 18:11:36,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:36,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723948844] [2023-11-22 18:11:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:36,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-22 18:11:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:36,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-22 18:11:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:11:36,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:36,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723948844] [2023-11-22 18:11:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723948844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:11:36,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788151637] [2023-11-22 18:11:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:36,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:36,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:36,510 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) [2023-11-22 18:11:36,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 18:11:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:36,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 18:11:36,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:11:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:11:36,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:11:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:11:37,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788151637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:11:37,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:11:37,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2023-11-22 18:11:37,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334368338] [2023-11-22 18:11:37,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:11:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 18:11:37,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 18:11:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:11:37,064 INFO L87 Difference]: Start difference. First operand 294 states and 434 transitions. Second operand has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 6 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 18:11:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:37,231 INFO L93 Difference]: Finished difference Result 705 states and 1040 transitions. [2023-11-22 18:11:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:11:37,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 6 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 95 [2023-11-22 18:11:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:37,236 INFO L225 Difference]: With dead ends: 705 [2023-11-22 18:11:37,236 INFO L226 Difference]: Without dead ends: 699 [2023-11-22 18:11:37,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:11:37,237 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 984 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:37,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 1225 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:11:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2023-11-22 18:11:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2023-11-22 18:11:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 683 states have (on average 1.4538799414348462) internal successors, (993), 683 states have internal predecessors, (993), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-22 18:11:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1017 transitions. [2023-11-22 18:11:37,271 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1017 transitions. Word has length 95 [2023-11-22 18:11:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:37,272 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1017 transitions. [2023-11-22 18:11:37,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 6 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 18:11:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1017 transitions. [2023-11-22 18:11:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-11-22 18:11:37,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:37,276 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:37,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-22 18:11:37,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:37,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:37,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash 255362003, now seen corresponding path program 1 times [2023-11-22 18:11:37,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:37,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219088754] [2023-11-22 18:11:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:11:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:38,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-22 18:11:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-22 18:11:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 4 proven. 327 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-22 18:11:38,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:11:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219088754] [2023-11-22 18:11:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219088754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:11:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104183011] [2023-11-22 18:11:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:38,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:11:38,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:11:38,041 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) [2023-11-22 18:11:38,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 18:11:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:11:38,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 18:11:38,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:11:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:11:38,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:11:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 448 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:11:39,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104183011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:11:39,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:11:39,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-22 18:11:39,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134463171] [2023-11-22 18:11:39,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:11:39,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 18:11:39,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:11:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 18:11:39,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-22 18:11:39,206 INFO L87 Difference]: Start difference. First operand 697 states and 1017 transitions. Second operand has 17 states, 17 states have (on average 49.1764705882353) internal successors, (836), 16 states have internal predecessors, (836), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-22 18:11:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:11:40,411 INFO L93 Difference]: Finished difference Result 2063 states and 3045 transitions. [2023-11-22 18:11:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 18:11:40,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 49.1764705882353) internal successors, (836), 16 states have internal predecessors, (836), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 320 [2023-11-22 18:11:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:11:40,419 INFO L225 Difference]: With dead ends: 2063 [2023-11-22 18:11:40,419 INFO L226 Difference]: Without dead ends: 1651 [2023-11-22 18:11:40,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2023-11-22 18:11:40,421 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 9232 mSDsluCounter, 2711 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9232 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-22 18:11:40,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9232 Valid, 3212 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-22 18:11:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2023-11-22 18:11:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1649. [2023-11-22 18:11:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1635 states have (on average 1.4666666666666666) internal successors, (2398), 1635 states have internal predecessors, (2398), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-22 18:11:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2422 transitions. [2023-11-22 18:11:40,468 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2422 transitions. Word has length 320 [2023-11-22 18:11:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:11:40,469 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2422 transitions. [2023-11-22 18:11:40,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 49.1764705882353) internal successors, (836), 16 states have internal predecessors, (836), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-22 18:11:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2422 transitions. [2023-11-22 18:11:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2023-11-22 18:11:40,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:11:40,480 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:11:40,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 18:11:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 18:11:40,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:11:40,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:11:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1864300677, now seen corresponding path program 1 times [2023-11-22 18:11:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:11:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141817149] [2023-11-22 18:11:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:11:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:31,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-22 18:13:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:31,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-22 18:13:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 496 proven. 2 refuted. 0 times theorem prover too weak. 2873 trivial. 0 not checked. [2023-11-22 18:13:31,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141817149] [2023-11-22 18:13:31,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141817149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063741347] [2023-11-22 18:13:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:31,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:13:31,792 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) [2023-11-22 18:13:31,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 18:13:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:40,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 3805 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-22 18:13:40,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:13:40,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-22 18:13:40,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:13:40,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 24 [2023-11-22 18:13:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 883 proven. 32 refuted. 0 times theorem prover too weak. 2456 trivial. 0 not checked. [2023-11-22 18:13:40,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:13:41,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:13:41,462 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 42 treesize of output 24 [2023-11-22 18:13:42,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063741347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:13:42,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 18:13:42,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13] total 16 [2023-11-22 18:13:42,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170642298] [2023-11-22 18:13:42,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 18:13:42,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 18:13:42,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 18:13:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:13:42,393 INFO L87 Difference]: Start difference. First operand 1649 states and 2422 transitions. Second operand has 16 states, 15 states have (on average 17.533333333333335) internal successors, (263), 15 states have internal predecessors, (263), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 18:13:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:45,585 INFO L93 Difference]: Finished difference Result 3233 states and 4745 transitions. [2023-11-22 18:13:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 18:13:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 17.533333333333335) internal successors, (263), 15 states have internal predecessors, (263), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 771 [2023-11-22 18:13:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:45,591 INFO L225 Difference]: With dead ends: 3233 [2023-11-22 18:13:45,591 INFO L226 Difference]: Without dead ends: 1700 [2023-11-22 18:13:45,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1497 GetRequests, 1463 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2023-11-22 18:13:45,594 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 969 mSDsluCounter, 3794 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 4304 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:45,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 4304 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2895 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-22 18:13:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2023-11-22 18:13:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1681. [2023-11-22 18:13:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1666 states have (on average 1.4627851140456183) internal successors, (2437), 1667 states have internal predecessors, (2437), 12 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-22 18:13:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 2471 transitions. [2023-11-22 18:13:45,630 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 2471 transitions. Word has length 771 [2023-11-22 18:13:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:45,630 INFO L495 AbstractCegarLoop]: Abstraction has 1681 states and 2471 transitions. [2023-11-22 18:13:45,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 17.533333333333335) internal successors, (263), 15 states have internal predecessors, (263), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 18:13:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 2471 transitions. [2023-11-22 18:13:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2023-11-22 18:13:45,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:45,643 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:13:45,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 18:13:45,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:13:45,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:45,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:45,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1382291461, now seen corresponding path program 1 times [2023-11-22 18:13:45,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:45,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827194087] [2023-11-22 18:13:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:45,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:46,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-22 18:13:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:46,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-22 18:13:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 864 proven. 0 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2023-11-22 18:13:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:46,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827194087] [2023-11-22 18:13:46,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827194087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:13:46,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:13:46,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 18:13:46,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841744202] [2023-11-22 18:13:46,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:13:46,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:13:46,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:46,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:13:46,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:13:46,647 INFO L87 Difference]: Start difference. First operand 1681 states and 2471 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:13:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:46,881 INFO L93 Difference]: Finished difference Result 3369 states and 4950 transitions. [2023-11-22 18:13:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 18:13:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 773 [2023-11-22 18:13:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:46,888 INFO L225 Difference]: With dead ends: 3369 [2023-11-22 18:13:46,888 INFO L226 Difference]: Without dead ends: 1753 [2023-11-22 18:13:46,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:13:46,890 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 4 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:46,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 697 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:13:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2023-11-22 18:13:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1743. [2023-11-22 18:13:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1728 states have (on average 1.4450231481481481) internal successors, (2497), 1729 states have internal predecessors, (2497), 12 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-22 18:13:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2531 transitions. [2023-11-22 18:13:46,927 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2531 transitions. Word has length 773 [2023-11-22 18:13:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:46,928 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 2531 transitions. [2023-11-22 18:13:46,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:13:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2531 transitions. [2023-11-22 18:13:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2023-11-22 18:13:46,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:46,934 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:13:46,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 18:13:46,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:46,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1987326341, now seen corresponding path program 1 times [2023-11-22 18:13:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:46,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829622314] [2023-11-22 18:13:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:46,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:13:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:47,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-22 18:13:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:47,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-22 18:13:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:13:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 837 proven. 0 refuted. 0 times theorem prover too weak. 2539 trivial. 0 not checked. [2023-11-22 18:13:47,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:13:47,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829622314] [2023-11-22 18:13:47,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829622314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:13:47,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:13:47,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 18:13:47,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923156187] [2023-11-22 18:13:47,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:13:47,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 18:13:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:13:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 18:13:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:13:47,569 INFO L87 Difference]: Start difference. First operand 1743 states and 2531 transitions. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 4 states have internal predecessors, (184), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:13:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:13:47,715 INFO L93 Difference]: Finished difference Result 2997 states and 4267 transitions. [2023-11-22 18:13:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:13:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 4 states have internal predecessors, (184), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 773 [2023-11-22 18:13:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:13:47,720 INFO L225 Difference]: With dead ends: 2997 [2023-11-22 18:13:47,720 INFO L226 Difference]: Without dead ends: 1261 [2023-11-22 18:13:47,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 18:13:47,724 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 80 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:13:47,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 566 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:13:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2023-11-22 18:13:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1261. [2023-11-22 18:13:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1246 states have (on average 1.35553772070626) internal successors, (1689), 1247 states have internal predecessors, (1689), 12 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-22 18:13:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1723 transitions. [2023-11-22 18:13:47,753 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1723 transitions. Word has length 773 [2023-11-22 18:13:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:13:47,754 INFO L495 AbstractCegarLoop]: Abstraction has 1261 states and 1723 transitions. [2023-11-22 18:13:47,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 4 states have internal predecessors, (184), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:13:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1723 transitions. [2023-11-22 18:13:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2023-11-22 18:13:47,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:13:47,761 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 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] [2023-11-22 18:13:47,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 18:13:47,761 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:13:47,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:13:47,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1674270485, now seen corresponding path program 1 times [2023-11-22 18:13:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:13:47,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556419581] [2023-11-22 18:13:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:13:47,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-22 18:15:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:19,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-22 18:15:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 496 proven. 6 refuted. 0 times theorem prover too weak. 2874 trivial. 0 not checked. [2023-11-22 18:15:19,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:19,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556419581] [2023-11-22 18:15:19,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556419581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:19,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279780199] [2023-11-22 18:15:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:19,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:19,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:19,092 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) [2023-11-22 18:15:19,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 18:15:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:21,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 3836 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 18:15:21,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 3069 trivial. 0 not checked. [2023-11-22 18:15:21,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 18:15:21,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279780199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:21,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 18:15:21,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-22 18:15:21,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613254212] [2023-11-22 18:15:21,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:21,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 18:15:21,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:21,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 18:15:21,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-22 18:15:21,966 INFO L87 Difference]: Start difference. First operand 1261 states and 1723 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:15:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:22,129 INFO L93 Difference]: Finished difference Result 2532 states and 3480 transitions. [2023-11-22 18:15:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 18:15:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 774 [2023-11-22 18:15:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:22,133 INFO L225 Difference]: With dead ends: 2532 [2023-11-22 18:15:22,133 INFO L226 Difference]: Without dead ends: 1306 [2023-11-22 18:15:22,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-22 18:15:22,136 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 8 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:22,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 659 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2023-11-22 18:15:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1297. [2023-11-22 18:15:22,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1282 states have (on average 1.344773790951638) internal successors, (1724), 1283 states have internal predecessors, (1724), 12 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-22 18:15:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1758 transitions. [2023-11-22 18:15:22,164 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1758 transitions. Word has length 774 [2023-11-22 18:15:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:22,164 INFO L495 AbstractCegarLoop]: Abstraction has 1297 states and 1758 transitions. [2023-11-22 18:15:22,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:15:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1758 transitions. [2023-11-22 18:15:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2023-11-22 18:15:22,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:22,170 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 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] [2023-11-22 18:15:22,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 18:15:22,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:22,396 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:22,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash -563593237, now seen corresponding path program 1 times [2023-11-22 18:15:22,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:22,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913009526] [2023-11-22 18:15:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:22,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:23,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-22 18:15:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:23,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-22 18:15:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3412 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 3079 trivial. 0 not checked. [2023-11-22 18:15:23,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:23,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913009526] [2023-11-22 18:15:23,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913009526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:23,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:23,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 18:15:23,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240581103] [2023-11-22 18:15:23,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:23,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 18:15:23,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:23,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 18:15:23,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-22 18:15:23,690 INFO L87 Difference]: Start difference. First operand 1297 states and 1758 transitions. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:15:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:24,036 INFO L93 Difference]: Finished difference Result 2597 states and 3540 transitions. [2023-11-22 18:15:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 18:15:24,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 784 [2023-11-22 18:15:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:24,043 INFO L225 Difference]: With dead ends: 2597 [2023-11-22 18:15:24,043 INFO L226 Difference]: Without dead ends: 1347 [2023-11-22 18:15:24,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-22 18:15:24,048 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 15 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:24,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 869 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:15:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2023-11-22 18:15:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1337. [2023-11-22 18:15:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1322 states have (on average 1.3419062027231468) internal successors, (1774), 1323 states have internal predecessors, (1774), 12 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-22 18:15:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1808 transitions. [2023-11-22 18:15:24,075 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1808 transitions. Word has length 784 [2023-11-22 18:15:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:24,076 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 1808 transitions. [2023-11-22 18:15:24,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 7 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:15:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1808 transitions. [2023-11-22 18:15:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2023-11-22 18:15:24,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:24,082 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2023-11-22 18:15:24,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 18:15:24,082 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:24,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1250980777, now seen corresponding path program 1 times [2023-11-22 18:15:24,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:24,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524979687] [2023-11-22 18:15:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:24,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:25,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-22 18:15:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:25,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-22 18:15:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3448 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 3089 trivial. 0 not checked. [2023-11-22 18:15:25,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:25,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524979687] [2023-11-22 18:15:25,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524979687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:25,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:25,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-22 18:15:25,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116908009] [2023-11-22 18:15:25,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:25,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 18:15:25,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 18:15:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-22 18:15:25,703 INFO L87 Difference]: Start difference. First operand 1337 states and 1808 transitions. Second operand has 10 states, 10 states have (on average 14.1) internal successors, (141), 9 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:15:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:26,221 INFO L93 Difference]: Finished difference Result 2717 states and 3704 transitions. [2023-11-22 18:15:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 18:15:26,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 9 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 793 [2023-11-22 18:15:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:26,225 INFO L225 Difference]: With dead ends: 2717 [2023-11-22 18:15:26,226 INFO L226 Difference]: Without dead ends: 1427 [2023-11-22 18:15:26,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:15:26,227 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 30 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:26,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1163 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:15:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-11-22 18:15:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1400. [2023-11-22 18:15:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1385 states have (on average 1.339350180505415) internal successors, (1855), 1386 states have internal predecessors, (1855), 12 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-22 18:15:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1889 transitions. [2023-11-22 18:15:26,252 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1889 transitions. Word has length 793 [2023-11-22 18:15:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:26,252 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1889 transitions. [2023-11-22 18:15:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 9 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:15:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1889 transitions. [2023-11-22 18:15:26,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2023-11-22 18:15:26,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:26,258 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 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] [2023-11-22 18:15:26,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-22 18:15:26,258 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:26,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:26,259 INFO L85 PathProgramCache]: Analyzing trace with hash 669262835, now seen corresponding path program 1 times [2023-11-22 18:15:26,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:26,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854832530] [2023-11-22 18:15:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:27,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-22 18:15:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:27,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-22 18:15:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3448 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 2507 trivial. 0 not checked. [2023-11-22 18:15:27,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:27,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854832530] [2023-11-22 18:15:27,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854832530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:27,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 18:15:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839045857] [2023-11-22 18:15:27,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:27,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 18:15:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:27,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 18:15:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:15:27,426 INFO L87 Difference]: Start difference. First operand 1400 states and 1889 transitions. Second operand has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 6 states have internal predecessors, (201), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:15:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:27,684 INFO L93 Difference]: Finished difference Result 2787 states and 3777 transitions. [2023-11-22 18:15:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 18:15:27,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 6 states have internal predecessors, (201), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 793 [2023-11-22 18:15:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:27,689 INFO L225 Difference]: With dead ends: 2787 [2023-11-22 18:15:27,689 INFO L226 Difference]: Without dead ends: 1440 [2023-11-22 18:15:27,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 18:15:27,691 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 6 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:27,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 677 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:15:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2023-11-22 18:15:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1430. [2023-11-22 18:15:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1415 states have (on average 1.332155477031802) internal successors, (1885), 1416 states have internal predecessors, (1885), 12 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-22 18:15:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 1919 transitions. [2023-11-22 18:15:27,718 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 1919 transitions. Word has length 793 [2023-11-22 18:15:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:27,718 INFO L495 AbstractCegarLoop]: Abstraction has 1430 states and 1919 transitions. [2023-11-22 18:15:27,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 6 states have internal predecessors, (201), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 18:15:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 1919 transitions. [2023-11-22 18:15:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2023-11-22 18:15:27,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:27,726 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 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] [2023-11-22 18:15:27,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-22 18:15:27,726 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:27,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash -503077515, now seen corresponding path program 1 times [2023-11-22 18:15:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5288032] [2023-11-22 18:15:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms Killed by 15