./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/neural-networks/cartpole_14_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c4f91361 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/neural-networks/cartpole_14_safe.c-amalgamation.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 54a3eb83fda1e22da4d7b0ce3a9ef1567d8d704b760d73bd93850904825c629b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 14:38:51,992 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 14:38:52,051 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 14:38:52,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 14:38:52,055 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 14:38:52,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 14:38:52,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 14:38:52,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 14:38:52,079 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 14:38:52,082 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 14:38:52,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 14:38:52,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 14:38:52,083 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 14:38:52,084 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 14:38:52,085 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 14:38:52,085 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 14:38:52,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 14:38:52,085 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 14:38:52,085 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 14:38:52,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 14:38:52,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 14:38:52,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 14:38:52,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 14:38:52,087 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 14:38:52,087 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 14:38:52,087 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 14:38:52,087 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 14:38:52,088 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 14:38:52,088 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 14:38:52,088 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 14:38:52,089 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 14:38:52,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:38:52,089 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 14:38:52,089 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 14:38:52,089 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 14:38:52,089 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 14:38:52,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 14:38:52,090 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 14:38:52,090 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 14:38:52,090 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 14:38:52,090 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 14:38:52,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 14:38:52,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54a3eb83fda1e22da4d7b0ce3a9ef1567d8d704b760d73bd93850904825c629b [2023-11-23 14:38:52,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 14:38:52,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 14:38:52,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 14:38:52,332 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 14:38:52,333 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 14:38:52,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/neural-networks/cartpole_14_safe.c-amalgamation.i [2023-11-23 14:38:53,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 14:38:53,508 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 14:38:53,508 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/cartpole_14_safe.c-amalgamation.i [2023-11-23 14:38:53,532 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8772c0b6f/996cbfc9e9784d91b1485d36a5ecbc83/FLAG7dc6886bc [2023-11-23 14:38:53,548 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8772c0b6f/996cbfc9e9784d91b1485d36a5ecbc83 [2023-11-23 14:38:53,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 14:38:53,551 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 14:38:53,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 14:38:53,554 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 14:38:53,557 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 14:38:53,558 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:38:53" (1/1) ... [2023-11-23 14:38:53,558 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b73853e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:53, skipping insertion in model container [2023-11-23 14:38:53,558 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:38:53" (1/1) ... [2023-11-23 14:38:53,627 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 14:38:54,097 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/cartpole_14_safe.c-amalgamation.i[63706,63719] [2023-11-23 14:38:54,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:38:54,364 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 14:38:54,398 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/cartpole_14_safe.c-amalgamation.i[63706,63719] [2023-11-23 14:38:54,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:38:54,688 INFO L206 MainTranslator]: Completed translation [2023-11-23 14:38:54,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54 WrapperNode [2023-11-23 14:38:54,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 14:38:54,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 14:38:54,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 14:38:54,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 14:38:54,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:54,771 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:54,947 INFO L138 Inliner]: procedures = 620, calls = 4746, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-23 14:38:54,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 14:38:54,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 14:38:54,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 14:38:54,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 14:38:54,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:54,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,047 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,093 INFO L175 MemorySlicer]: Split 4721 memory accesses to 12 slices as follows [13, 2, 7, 3, 257, 65, 4097, 65, 129, 3, 10, 70]. 87 percent of accesses are in the largest equivalence class. The 4687 initializations are split as follows [0, 2, 7, 0, 256, 64, 4096, 64, 128, 2, 4, 64]. The 10 writes are split as follows [4, 0, 0, 1, 0, 0, 0, 0, 0, 0, 3, 2]. [2023-11-23 14:38:55,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,160 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,167 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,205 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,237 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 14:38:55,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 14:38:55,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 14:38:55,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 14:38:55,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (1/1) ... [2023-11-23 14:38:55,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:38:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:38:55,270 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) [2023-11-23 14:38:55,290 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 [2023-11-23 14:38:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-23 14:38:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-23 14:38:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-23 14:38:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-23 14:38:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-23 14:38:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-23 14:38:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-23 14:38:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-23 14:38:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-23 14:38:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-23 14:38:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-23 14:38:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-23 14:38:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 14:38:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-23 14:38:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-23 14:38:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-23 14:38:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-23 14:38:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-23 14:38:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-23 14:38:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-23 14:38:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-23 14:38:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-23 14:38:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-23 14:38:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-23 14:38:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-23 14:38:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-23 14:38:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-23 14:38:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-23 14:38:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-23 14:38:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-23 14:38:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-23 14:38:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-23 14:38:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-23 14:38:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 14:38:55,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-23 14:38:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-23 14:38:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-23 14:38:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-23 14:38:55,598 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 14:38:55,600 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 14:39:00,257 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 14:39:00,493 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 14:39:00,493 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-23 14:39:00,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:39:00 BoogieIcfgContainer [2023-11-23 14:39:00,494 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 14:39:00,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 14:39:00,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 14:39:00,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 14:39:00,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:38:53" (1/3) ... [2023-11-23 14:39:00,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d912a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:39:00, skipping insertion in model container [2023-11-23 14:39:00,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:54" (2/3) ... [2023-11-23 14:39:00,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d912a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:39:00, skipping insertion in model container [2023-11-23 14:39:00,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:39:00" (3/3) ... [2023-11-23 14:39:00,499 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_14_safe.c-amalgamation.i [2023-11-23 14:39:00,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 14:39:00,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 14:39:00,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 14:39:00,547 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;@147c1399, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 14:39:00,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 14:39:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 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) [2023-11-23 14:39:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 14:39:00,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:00,555 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] [2023-11-23 14:39:00,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:00,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash -531373804, now seen corresponding path program 1 times [2023-11-23 14:39:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:00,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059352304] [2023-11-23 14:39:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:00,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:01,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:01,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059352304] [2023-11-23 14:39:01,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059352304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:39:01,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:39:01,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 14:39:01,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938484118] [2023-11-23 14:39:01,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:01,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 14:39:01,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:01,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 14:39:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 14:39:01,262 INFO L87 Difference]: Start difference. First operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 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) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2023-11-23 14:39:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:01,459 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2023-11-23 14:39:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 14:39:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2023-11-23 14:39:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:01,467 INFO L225 Difference]: With dead ends: 89 [2023-11-23 14:39:01,467 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 14:39:01,469 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 [2023-11-23 14:39:01,471 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:01,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 14:39:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-23 14:39:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 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) [2023-11-23 14:39:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-23 14:39:01,495 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 27 [2023-11-23 14:39:01,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:01,496 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-23 14:39:01,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2023-11-23 14:39:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-23 14:39:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 14:39:01,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:01,497 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] [2023-11-23 14:39:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 14:39:01,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:01,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1087110762, now seen corresponding path program 1 times [2023-11-23 14:39:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126031294] [2023-11-23 14:39:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:01,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:02,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:02,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126031294] [2023-11-23 14:39:02,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126031294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:39:02,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:39:02,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 14:39:02,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171910764] [2023-11-23 14:39:02,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:02,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:39:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:39:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:39:02,088 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-11-23 14:39:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:02,281 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-11-23 14:39:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:39:02,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2023-11-23 14:39:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:02,283 INFO L225 Difference]: With dead ends: 80 [2023-11-23 14:39:02,283 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 14:39:02,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:39:02,284 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:02,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 14:39:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-23 14:39:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 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) [2023-11-23 14:39:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-23 14:39:02,287 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 27 [2023-11-23 14:39:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:02,287 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-23 14:39:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-11-23 14:39:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-11-23 14:39:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 14:39:02,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:02,289 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] [2023-11-23 14:39:02,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 14:39:02,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:02,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash -269462312, now seen corresponding path program 1 times [2023-11-23 14:39:02,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:02,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065728862] [2023-11-23 14:39:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:03,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:03,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065728862] [2023-11-23 14:39:03,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065728862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:39:03,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:39:03,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 14:39:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745364096] [2023-11-23 14:39:03,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:39:03,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:39:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:39:03,036 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-11-23 14:39:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:03,231 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-11-23 14:39:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:39:03,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2023-11-23 14:39:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:03,232 INFO L225 Difference]: With dead ends: 75 [2023-11-23 14:39:03,232 INFO L226 Difference]: Without dead ends: 45 [2023-11-23 14:39:03,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:39:03,233 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:03,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-23 14:39:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-23 14:39:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 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) [2023-11-23 14:39:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-23 14:39:03,241 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 27 [2023-11-23 14:39:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:03,241 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-23 14:39:03,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-11-23 14:39:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-23 14:39:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 14:39:03,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:03,243 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] [2023-11-23 14:39:03,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 14:39:03,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:03,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1144208086, now seen corresponding path program 1 times [2023-11-23 14:39:03,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:03,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216463407] [2023-11-23 14:39:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:03,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:04,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:04,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216463407] [2023-11-23 14:39:04,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216463407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:04,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734786465] [2023-11-23 14:39:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:04,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:04,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:04,061 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) [2023-11-23 14:39:04,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 14:39:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:05,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 5408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 14:39:05,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:39:05,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 14:39:05,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734786465] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:05,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:05,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-23 14:39:05,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783444114] [2023-11-23 14:39:05,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:05,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:39:05,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:05,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:39:05,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:39:05,176 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-23 14:39:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:05,376 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-23 14:39:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:39:05,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2023-11-23 14:39:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:05,377 INFO L225 Difference]: With dead ends: 66 [2023-11-23 14:39:05,377 INFO L226 Difference]: Without dead ends: 46 [2023-11-23 14:39:05,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:39:05,378 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:05,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-23 14:39:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-23 14:39:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 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) [2023-11-23 14:39:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-23 14:39:05,381 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 28 [2023-11-23 14:39:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:05,381 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-23 14:39:05,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-23 14:39:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-23 14:39:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 14:39:05,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:05,382 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] [2023-11-23 14:39:05,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:05,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:05,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:05,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:05,589 INFO L85 PathProgramCache]: Analyzing trace with hash -372313272, now seen corresponding path program 1 times [2023-11-23 14:39:05,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:05,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096024644] [2023-11-23 14:39:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:05,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 14:39:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096024644] [2023-11-23 14:39:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096024644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:06,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246344112] [2023-11-23 14:39:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:06,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:06,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:06,316 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) [2023-11-23 14:39:06,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 14:39:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:07,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 14:39:07,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 14:39:07,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:39:07,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246344112] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:07,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:07,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-23 14:39:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071984590] [2023-11-23 14:39:07,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:07,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:39:07,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:39:07,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:39:07,318 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-23 14:39:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:07,516 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-23 14:39:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:39:07,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 31 [2023-11-23 14:39:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:07,517 INFO L225 Difference]: With dead ends: 57 [2023-11-23 14:39:07,517 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 14:39:07,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:39:07,518 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:07,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 14:39:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-23 14:39:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 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) [2023-11-23 14:39:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-23 14:39:07,521 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2023-11-23 14:39:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:07,521 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-23 14:39:07,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-23 14:39:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-23 14:39:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 14:39:07,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:07,522 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] [2023-11-23 14:39:07,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 14:39:07,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:07,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:07,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2044304526, now seen corresponding path program 1 times [2023-11-23 14:39:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:07,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179074740] [2023-11-23 14:39:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:07,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:39:08,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:08,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179074740] [2023-11-23 14:39:08,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179074740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:08,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431450598] [2023-11-23 14:39:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:08,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:08,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:08,397 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) [2023-11-23 14:39:08,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 14:39:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:09,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 14:39:09,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:39:09,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:39:09,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431450598] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:09,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:09,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-23 14:39:09,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827645475] [2023-11-23 14:39:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:09,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:39:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:39:09,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:39:09,400 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-11-23 14:39:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:09,577 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-11-23 14:39:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:39:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 34 [2023-11-23 14:39:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:09,577 INFO L225 Difference]: With dead ends: 74 [2023-11-23 14:39:09,578 INFO L226 Difference]: Without dead ends: 48 [2023-11-23 14:39:09,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:39:09,578 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:09,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-23 14:39:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-23 14:39:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 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) [2023-11-23 14:39:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-23 14:39:09,583 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 34 [2023-11-23 14:39:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:09,583 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-23 14:39:09,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-11-23 14:39:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-23 14:39:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 14:39:09,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:09,584 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] [2023-11-23 14:39:09,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:09,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:09,804 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:09,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash -359810836, now seen corresponding path program 1 times [2023-11-23 14:39:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:09,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617269495] [2023-11-23 14:39:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:39:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:10,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617269495] [2023-11-23 14:39:10,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617269495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:10,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833578977] [2023-11-23 14:39:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:10,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:10,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:10,448 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) [2023-11-23 14:39:10,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 14:39:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:11,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 5450 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 14:39:11,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:39:11,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 14:39:11,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833578977] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:11,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:11,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-23 14:39:11,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356258136] [2023-11-23 14:39:11,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:11,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:39:11,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:39:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:39:11,365 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-23 14:39:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:11,544 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-11-23 14:39:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:39:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2023-11-23 14:39:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:11,545 INFO L225 Difference]: With dead ends: 64 [2023-11-23 14:39:11,545 INFO L226 Difference]: Without dead ends: 49 [2023-11-23 14:39:11,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:39:11,546 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:11,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-23 14:39:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-23 14:39:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 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) [2023-11-23 14:39:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-23 14:39:11,549 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 37 [2023-11-23 14:39:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:11,549 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-23 14:39:11,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-23 14:39:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-23 14:39:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 14:39:11,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:11,550 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] [2023-11-23 14:39:11,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:11,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:11,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:11,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:11,761 INFO L85 PathProgramCache]: Analyzing trace with hash 242160194, now seen corresponding path program 1 times [2023-11-23 14:39:11,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:11,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090648334] [2023-11-23 14:39:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:11,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 14:39:12,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090648334] [2023-11-23 14:39:12,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090648334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:12,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630244299] [2023-11-23 14:39:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:12,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:12,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:12,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 14:39:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:13,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 5456 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 14:39:13,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 14:39:13,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:39:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630244299] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:13,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:13,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-23 14:39:13,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757067200] [2023-11-23 14:39:13,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:13,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:39:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:13,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:39:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:39:13,343 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-23 14:39:13,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:13,531 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-23 14:39:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:39:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2023-11-23 14:39:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:13,532 INFO L225 Difference]: With dead ends: 54 [2023-11-23 14:39:13,532 INFO L226 Difference]: Without dead ends: 50 [2023-11-23 14:39:13,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:39:13,533 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:13,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-23 14:39:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-23 14:39:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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) [2023-11-23 14:39:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-23 14:39:13,536 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2023-11-23 14:39:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:13,536 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-23 14:39:13,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-23 14:39:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-23 14:39:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 14:39:13,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:13,537 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] [2023-11-23 14:39:13,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:13,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:13,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:13,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1371144433, now seen corresponding path program 1 times [2023-11-23 14:39:13,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:13,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741930079] [2023-11-23 14:39:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:13,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:39:14,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741930079] [2023-11-23 14:39:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741930079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180153864] [2023-11-23 14:39:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:14,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:14,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:14,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:14,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 14:39:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:15,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 5462 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 14:39:15,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 14:39:15,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:39:15,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180153864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:15,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:15,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-23 14:39:15,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014411529] [2023-11-23 14:39:15,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:15,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 14:39:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:15,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 14:39:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:39:15,368 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2023-11-23 14:39:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:15,644 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2023-11-23 14:39:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 14:39:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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 43 [2023-11-23 14:39:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:15,645 INFO L225 Difference]: With dead ends: 95 [2023-11-23 14:39:15,646 INFO L226 Difference]: Without dead ends: 60 [2023-11-23 14:39:15,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 14:39:15,646 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:15,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 230 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:39:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-23 14:39:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-23 14:39:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 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) [2023-11-23 14:39:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-23 14:39:15,650 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 43 [2023-11-23 14:39:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:15,650 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-23 14:39:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2023-11-23 14:39:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-23 14:39:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 14:39:15,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:15,651 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:15,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:15,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:15,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:15,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash 528894503, now seen corresponding path program 2 times [2023-11-23 14:39:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:15,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538165869] [2023-11-23 14:39:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:15,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 14:39:16,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538165869] [2023-11-23 14:39:16,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538165869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569993978] [2023-11-23 14:39:16,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:39:16,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:16,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:16,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 14:39:17,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:39:17,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:17,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 5527 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 14:39:17,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 14:39:17,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 14:39:17,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569993978] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:17,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-11-23 14:39:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789544721] [2023-11-23 14:39:17,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:17,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:39:17,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:39:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:39:17,477 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2023-11-23 14:39:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:17,664 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2023-11-23 14:39:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:39:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 53 [2023-11-23 14:39:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:17,665 INFO L225 Difference]: With dead ends: 70 [2023-11-23 14:39:17,665 INFO L226 Difference]: Without dead ends: 61 [2023-11-23 14:39:17,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:39:17,666 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:17,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:17,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-23 14:39:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-23 14:39:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 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) [2023-11-23 14:39:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-23 14:39:17,669 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 53 [2023-11-23 14:39:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:17,670 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-23 14:39:17,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2023-11-23 14:39:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-23 14:39:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 14:39:17,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:17,670 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:17,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:17,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:17,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:17,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1861807109, now seen corresponding path program 1 times [2023-11-23 14:39:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:17,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928395275] [2023-11-23 14:39:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:17,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 14:39:18,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:18,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928395275] [2023-11-23 14:39:18,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928395275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:18,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555496394] [2023-11-23 14:39:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:18,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:18,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:18,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 14:39:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:19,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 5541 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 14:39:19,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 14:39:19,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 14:39:19,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555496394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:19,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:19,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-23 14:39:19,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193992635] [2023-11-23 14:39:19,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:19,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 14:39:19,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 14:39:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 14:39:19,392 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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) [2023-11-23 14:39:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:19,683 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2023-11-23 14:39:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 14:39:19,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 56 [2023-11-23 14:39:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:19,684 INFO L225 Difference]: With dead ends: 116 [2023-11-23 14:39:19,684 INFO L226 Difference]: Without dead ends: 71 [2023-11-23 14:39:19,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 14:39:19,685 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:19,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 267 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:39:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-23 14:39:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-23 14:39:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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) [2023-11-23 14:39:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2023-11-23 14:39:19,690 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 56 [2023-11-23 14:39:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:19,690 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2023-11-23 14:39:19,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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) [2023-11-23 14:39:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2023-11-23 14:39:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 14:39:19,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:19,691 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:19,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:19,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 14:39:19,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:19,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:19,905 INFO L85 PathProgramCache]: Analyzing trace with hash -78359747, now seen corresponding path program 2 times [2023-11-23 14:39:19,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:19,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405195716] [2023-11-23 14:39:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:19,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-23 14:39:20,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:20,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405195716] [2023-11-23 14:39:20,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405195716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:20,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957357620] [2023-11-23 14:39:20,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:39:20,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:20,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:20,639 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:20,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 14:39:21,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:39:21,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:21,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 5606 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 14:39:21,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 14:39:21,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-23 14:39:21,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957357620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:21,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:21,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 6] total 16 [2023-11-23 14:39:21,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005916388] [2023-11-23 14:39:21,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:21,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 14:39:21,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 14:39:21,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-23 14:39:21,770 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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) [2023-11-23 14:39:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:22,271 INFO L93 Difference]: Finished difference Result 135 states and 182 transitions. [2023-11-23 14:39:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 14:39:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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 66 [2023-11-23 14:39:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:22,273 INFO L225 Difference]: With dead ends: 135 [2023-11-23 14:39:22,273 INFO L226 Difference]: Without dead ends: 81 [2023-11-23 14:39:22,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2023-11-23 14:39:22,274 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 116 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:22,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 262 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:39:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-23 14:39:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-23 14:39:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 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) [2023-11-23 14:39:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2023-11-23 14:39:22,280 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 66 [2023-11-23 14:39:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:22,280 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2023-11-23 14:39:22,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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) [2023-11-23 14:39:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2023-11-23 14:39:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 14:39:22,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:22,282 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:22,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:22,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:22,492 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:22,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1529729791, now seen corresponding path program 3 times [2023-11-23 14:39:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:22,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970671579] [2023-11-23 14:39:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:22,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 14:39:23,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970671579] [2023-11-23 14:39:23,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970671579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489096481] [2023-11-23 14:39:23,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:39:23,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:23,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:23,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:23,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 14:39:24,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 14:39:24,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:24,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 5473 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 14:39:24,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-23 14:39:24,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-23 14:39:24,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489096481] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:24,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:24,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 13 [2023-11-23 14:39:24,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819213666] [2023-11-23 14:39:24,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:24,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:39:24,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:24,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:39:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:39:24,296 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-11-23 14:39:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:24,475 INFO L93 Difference]: Finished difference Result 122 states and 163 transitions. [2023-11-23 14:39:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:39:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 70 [2023-11-23 14:39:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:24,476 INFO L225 Difference]: With dead ends: 122 [2023-11-23 14:39:24,476 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 14:39:24,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:39:24,477 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:24,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 14:39:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-23 14:39:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 81 states have internal predecessors, (108), 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) [2023-11-23 14:39:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2023-11-23 14:39:24,481 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 70 [2023-11-23 14:39:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:24,482 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2023-11-23 14:39:24,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-11-23 14:39:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2023-11-23 14:39:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 14:39:24,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:24,483 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:24,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-23 14:39:24,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 14:39:24,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:24,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:24,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1554558736, now seen corresponding path program 1 times [2023-11-23 14:39:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:24,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452827438] [2023-11-23 14:39:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:24,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-23 14:39:25,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:25,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452827438] [2023-11-23 14:39:25,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452827438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:25,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594424054] [2023-11-23 14:39:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:25,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:25,444 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:25,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 14:39:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:26,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 5645 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 14:39:26,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-23 14:39:26,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:39:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594424054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:39:26,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 14:39:26,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-23 14:39:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083361144] [2023-11-23 14:39:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:39:26,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:39:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 14:39:26,424 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2023-11-23 14:39:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:26,601 INFO L93 Difference]: Finished difference Result 147 states and 197 transitions. [2023-11-23 14:39:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:39:26,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 73 [2023-11-23 14:39:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:26,601 INFO L225 Difference]: With dead ends: 147 [2023-11-23 14:39:26,601 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 14:39:26,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 14:39:26,604 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:26,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 14:39:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2023-11-23 14:39:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.329268292682927) internal successors, (109), 82 states have internal predecessors, (109), 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) [2023-11-23 14:39:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2023-11-23 14:39:26,609 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 73 [2023-11-23 14:39:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:26,609 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2023-11-23 14:39:26,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2023-11-23 14:39:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2023-11-23 14:39:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 14:39:26,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:26,610 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:26,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:26,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 14:39:26,820 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:26,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1120259536, now seen corresponding path program 1 times [2023-11-23 14:39:26,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:26,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488697150] [2023-11-23 14:39:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:26,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 14:39:27,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488697150] [2023-11-23 14:39:27,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488697150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029207404] [2023-11-23 14:39:27,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:27,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:27,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:27,533 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:27,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 14:39:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:28,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 5659 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 14:39:28,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 14:39:28,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-23 14:39:28,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029207404] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:28,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:28,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 13 [2023-11-23 14:39:28,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801683350] [2023-11-23 14:39:28,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:28,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:39:28,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:28,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:39:28,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:39:28,529 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2023-11-23 14:39:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:28,728 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2023-11-23 14:39:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:39:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 76 [2023-11-23 14:39:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:28,729 INFO L225 Difference]: With dead ends: 125 [2023-11-23 14:39:28,729 INFO L226 Difference]: Without dead ends: 84 [2023-11-23 14:39:28,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:39:28,730 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:28,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-23 14:39:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-23 14:39:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 83 states have internal predecessors, (110), 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) [2023-11-23 14:39:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2023-11-23 14:39:28,734 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 76 [2023-11-23 14:39:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:28,735 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2023-11-23 14:39:28,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2023-11-23 14:39:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2023-11-23 14:39:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-23 14:39:28,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:28,736 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:28,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:28,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 14:39:28,940 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:28,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash -604552515, now seen corresponding path program 1 times [2023-11-23 14:39:28,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:28,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560306331] [2023-11-23 14:39:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:28,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-23 14:39:29,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560306331] [2023-11-23 14:39:29,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560306331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510500000] [2023-11-23 14:39:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:29,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:29,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:29,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:29,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 14:39:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:30,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 5664 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 14:39:30,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-23 14:39:30,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-23 14:39:30,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510500000] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:30,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:30,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 13 [2023-11-23 14:39:30,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454761385] [2023-11-23 14:39:30,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:30,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:39:30,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:30,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:39:30,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:39:30,674 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-23 14:39:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:30,887 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2023-11-23 14:39:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:39:30,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 77 [2023-11-23 14:39:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:30,888 INFO L225 Difference]: With dead ends: 107 [2023-11-23 14:39:30,888 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 14:39:30,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:39:30,889 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:30,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 14:39:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-23 14:39:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 87 states have internal predecessors, (114), 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) [2023-11-23 14:39:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2023-11-23 14:39:30,895 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 77 [2023-11-23 14:39:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:30,895 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2023-11-23 14:39:30,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-23 14:39:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2023-11-23 14:39:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 14:39:30,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:30,896 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:30,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-23 14:39:31,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 14:39:31,112 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:31,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:31,113 INFO L85 PathProgramCache]: Analyzing trace with hash -550947933, now seen corresponding path program 1 times [2023-11-23 14:39:31,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:31,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782914749] [2023-11-23 14:39:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:31,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-23 14:39:31,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:31,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782914749] [2023-11-23 14:39:31,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782914749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:31,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742038472] [2023-11-23 14:39:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:31,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:31,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:31,804 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:31,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 14:39:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:32,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 5674 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 14:39:32,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-23 14:39:32,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-23 14:39:32,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742038472] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:32,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 14:39:32,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 16 [2023-11-23 14:39:32,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974126689] [2023-11-23 14:39:32,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:39:32,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:39:32,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:39:32,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-23 14:39:32,840 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-23 14:39:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:33,021 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2023-11-23 14:39:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:39:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 79 [2023-11-23 14:39:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:33,022 INFO L225 Difference]: With dead ends: 157 [2023-11-23 14:39:33,022 INFO L226 Difference]: Without dead ends: 89 [2023-11-23 14:39:33,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-23 14:39:33,023 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:33,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:39:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-23 14:39:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-23 14:39:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 88 states have internal predecessors, (115), 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) [2023-11-23 14:39:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2023-11-23 14:39:33,027 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 79 [2023-11-23 14:39:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:33,027 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2023-11-23 14:39:33,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-23 14:39:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2023-11-23 14:39:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 14:39:33,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:33,028 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:33,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-23 14:39:33,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:33,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:33,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1880924804, now seen corresponding path program 1 times [2023-11-23 14:39:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733522802] [2023-11-23 14:39:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-23 14:39:33,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:33,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733522802] [2023-11-23 14:39:33,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733522802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263866911] [2023-11-23 14:39:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:33,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:33,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:33,934 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:33,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 14:39:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:34,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 5679 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 14:39:34,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-23 14:39:34,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-23 14:39:34,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263866911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:34,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:34,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-23 14:39:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005838797] [2023-11-23 14:39:34,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:34,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 14:39:34,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 14:39:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-23 14:39:34,995 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 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) [2023-11-23 14:39:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:35,542 INFO L93 Difference]: Finished difference Result 177 states and 238 transitions. [2023-11-23 14:39:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 14:39:35,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 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 80 [2023-11-23 14:39:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:35,543 INFO L225 Difference]: With dead ends: 177 [2023-11-23 14:39:35,543 INFO L226 Difference]: Without dead ends: 108 [2023-11-23 14:39:35,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-23 14:39:35,544 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 45 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:35,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 469 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 14:39:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-23 14:39:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-23 14:39:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.308411214953271) internal successors, (140), 107 states have internal predecessors, (140), 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) [2023-11-23 14:39:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2023-11-23 14:39:35,551 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 80 [2023-11-23 14:39:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:35,551 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2023-11-23 14:39:35,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 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) [2023-11-23 14:39:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2023-11-23 14:39:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 14:39:35,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:35,553 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:35,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:35,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 14:39:35,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:35,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:35,765 INFO L85 PathProgramCache]: Analyzing trace with hash 213343619, now seen corresponding path program 2 times [2023-11-23 14:39:35,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:35,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313628257] [2023-11-23 14:39:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:35,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-23 14:39:36,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:36,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313628257] [2023-11-23 14:39:36,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313628257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:36,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232393426] [2023-11-23 14:39:36,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:39:36,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:36,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:36,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:36,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 14:39:37,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:39:37,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:37,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 5792 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 14:39:37,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-23 14:39:37,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-11-23 14:39:38,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232393426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:38,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:38,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 26 [2023-11-23 14:39:38,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637468845] [2023-11-23 14:39:38,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:38,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 14:39:38,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:38,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 14:39:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-11-23 14:39:38,032 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 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) [2023-11-23 14:39:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:38,675 INFO L93 Difference]: Finished difference Result 206 states and 272 transitions. [2023-11-23 14:39:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 14:39:38,676 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 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 99 [2023-11-23 14:39:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:38,676 INFO L225 Difference]: With dead ends: 206 [2023-11-23 14:39:38,676 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 14:39:38,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-11-23 14:39:38,677 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 39 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:38,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 609 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 14:39:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 14:39:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2023-11-23 14:39:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 112 states have internal predecessors, (145), 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) [2023-11-23 14:39:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2023-11-23 14:39:38,684 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 99 [2023-11-23 14:39:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:38,684 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2023-11-23 14:39:38,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 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) [2023-11-23 14:39:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2023-11-23 14:39:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 14:39:38,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:38,685 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:38,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:38,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:38,896 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:38,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash -774915223, now seen corresponding path program 3 times [2023-11-23 14:39:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744953895] [2023-11-23 14:39:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-23 14:39:40,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:40,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744953895] [2023-11-23 14:39:40,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744953895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:40,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470585] [2023-11-23 14:39:40,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:39:40,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:40,052 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:40,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 14:39:41,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 14:39:41,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:41,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 14:39:41,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-23 14:39:41,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-23 14:39:41,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:41,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:41,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 6] total 24 [2023-11-23 14:39:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337136218] [2023-11-23 14:39:41,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 14:39:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 14:39:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-11-23 14:39:41,460 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 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) [2023-11-23 14:39:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:42,290 INFO L93 Difference]: Finished difference Result 232 states and 302 transitions. [2023-11-23 14:39:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 14:39:42,290 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 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 104 [2023-11-23 14:39:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:42,291 INFO L225 Difference]: With dead ends: 232 [2023-11-23 14:39:42,291 INFO L226 Difference]: Without dead ends: 139 [2023-11-23 14:39:42,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 14:39:42,292 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:42,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 492 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 14:39:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-23 14:39:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2023-11-23 14:39:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.2720588235294117) internal successors, (173), 136 states have internal predecessors, (173), 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) [2023-11-23 14:39:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2023-11-23 14:39:42,299 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 104 [2023-11-23 14:39:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:42,300 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2023-11-23 14:39:42,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 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) [2023-11-23 14:39:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2023-11-23 14:39:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-23 14:39:42,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:42,301 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:42,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:42,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:42,522 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:42,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1041239427, now seen corresponding path program 4 times [2023-11-23 14:39:42,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:42,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261287604] [2023-11-23 14:39:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:42,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-23 14:39:43,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:43,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261287604] [2023-11-23 14:39:43,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261287604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:43,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068850713] [2023-11-23 14:39:43,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:39:43,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:43,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:43,769 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:43,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 14:39:44,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:39:44,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:39:44,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 5940 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 14:39:44,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:39:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-23 14:39:44,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:39:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-23 14:39:44,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068850713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:39:44,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:39:44,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 7] total 25 [2023-11-23 14:39:44,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948221713] [2023-11-23 14:39:44,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:39:44,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 14:39:44,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:39:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 14:39:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-11-23 14:39:44,961 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 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) [2023-11-23 14:39:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:39:45,802 INFO L93 Difference]: Finished difference Result 208 states and 273 transitions. [2023-11-23 14:39:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 14:39:45,802 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 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 128 [2023-11-23 14:39:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:39:45,803 INFO L225 Difference]: With dead ends: 208 [2023-11-23 14:39:45,803 INFO L226 Difference]: Without dead ends: 160 [2023-11-23 14:39:45,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2023-11-23 14:39:45,804 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 56 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 14:39:45,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 946 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 14:39:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-23 14:39:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2023-11-23 14:39:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.2802547770700636) internal successors, (201), 157 states have internal predecessors, (201), 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) [2023-11-23 14:39:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2023-11-23 14:39:45,814 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 128 [2023-11-23 14:39:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:39:45,814 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2023-11-23 14:39:45,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 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) [2023-11-23 14:39:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2023-11-23 14:39:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-23 14:39:45,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:39:45,815 INFO L195 NwaCegarLoop]: trace histogram [16, 13, 13, 13, 10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:39:45,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 14:39:46,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:46,032 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:39:46,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:39:46,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1197000503, now seen corresponding path program 5 times [2023-11-23 14:39:46,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:39:46,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528660752] [2023-11-23 14:39:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:39:46,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:39:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:39:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-11-23 14:39:47,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:39:47,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528660752] [2023-11-23 14:39:47,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528660752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:39:47,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504160207] [2023-11-23 14:39:47,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:39:47,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:39:47,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:39:47,468 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:39:47,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process Killed by 15