./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/memory-model/4SB.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/memory-model/4SB.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 15b0cbd6c91287c392a1dcce1e0a32a1c72d5f0acdee848dea776c36b74cf850 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:52:24,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:52:24,239 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:52:24,250 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:52:24,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:52:24,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:52:24,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:52:24,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:52:24,274 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:52:24,274 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:52:24,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:52:24,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:52:24,275 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:52:24,275 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:52:24,276 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:52:24,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:52:24,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:52:24,276 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:52:24,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:52:24,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:52:24,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:52:24,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:52:24,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:52:24,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:52:24,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:52:24,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:52:24,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:52:24,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:52:24,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:52:24,279 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:52:24,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:52:24,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:52:24,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:52:24,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:52:24,280 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:52:24,281 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:52:24,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:52:24,281 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:52:24,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:52:24,281 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:52:24,281 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:52:24,282 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:52:24,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15b0cbd6c91287c392a1dcce1e0a32a1c72d5f0acdee848dea776c36b74cf850 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 21:52:24,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:52:24,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:52:24,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:52:24,552 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:52:24,552 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:52:24,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memory-model/4SB.i [2023-11-22 21:52:25,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:52:25,814 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:52:25,814 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/memory-model/4SB.i [2023-11-22 21:52:25,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f9e36012/6e5b10540d254f40aa92e22b2c2e7aef/FLAG909faf4f1 [2023-11-22 21:52:25,850 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f9e36012/6e5b10540d254f40aa92e22b2c2e7aef [2023-11-22 21:52:25,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:52:25,855 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:52:25,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:52:25,857 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:52:25,861 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:52:25,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:52:25" (1/1) ... [2023-11-22 21:52:25,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7c2a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:25, skipping insertion in model container [2023-11-22 21:52:25,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:52:25" (1/1) ... [2023-11-22 21:52:25,910 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:52:26,149 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/memory-model/4SB.i[21105,21118] [2023-11-22 21:52:26,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:52:26,169 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:52:26,273 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/memory-model/4SB.i[21105,21118] [2023-11-22 21:52:26,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:52:26,285 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:52:26,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26 WrapperNode [2023-11-22 21:52:26,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:52:26,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:52:26,295 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:52:26,295 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:52:26,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,406 INFO L138 Inliner]: procedures = 28, calls = 671, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1598 [2023-11-22 21:52:26,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:52:26,407 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:52:26,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:52:26,408 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:52:26,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,438 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,477 INFO L189 HeapSplitter]: Split 479 memory accesses to 16 slices as follows [13, 60, 3, 3, 13, 11, 13, 10, 45, 152, 12, 10, 10, 15, 13, 96] [2023-11-22 21:52:26,483 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,533 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,539 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,568 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:52:26,569 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:52:26,569 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:52:26,569 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:52:26,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (1/1) ... [2023-11-22 21:52:26,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:52:26,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:26,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:52:26,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:52:26,650 INFO L130 BoogieDeclarations]: Found specification of procedure store_buffering_4_conditions [2023-11-22 21:52:26,651 INFO L138 BoogieDeclarations]: Found implementation of procedure store_buffering_4_conditions [2023-11-22 21:52:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure tso_core_write [2023-11-22 21:52:26,652 INFO L138 BoogieDeclarations]: Found implementation of procedure tso_core_write [2023-11-22 21:52:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_headerT [2023-11-22 21:52:26,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_nondet_headerT [2023-11-22 21:52:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure stepWriteBuffer [2023-11-22 21:52:26,653 INFO L138 BoogieDeclarations]: Found implementation of procedure stepWriteBuffer [2023-11-22 21:52:26,653 INFO L130 BoogieDeclarations]: Found specification of procedure tso_core_read [2023-11-22 21:52:26,654 INFO L138 BoogieDeclarations]: Found implementation of procedure tso_core_read [2023-11-22 21:52:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2023-11-22 21:52:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2023-11-22 21:52:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2023-11-22 21:52:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2023-11-22 21:52:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2023-11-22 21:52:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#5 [2023-11-22 21:52:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#6 [2023-11-22 21:52:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#7 [2023-11-22 21:52:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#8 [2023-11-22 21:52:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#9 [2023-11-22 21:52:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#10 [2023-11-22 21:52:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#11 [2023-11-22 21:52:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#12 [2023-11-22 21:52:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#13 [2023-11-22 21:52:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#14 [2023-11-22 21:52:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#15 [2023-11-22 21:52:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:52:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 21:52:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 21:52:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 21:52:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-22 21:52:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-22 21:52:26,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-22 21:52:26,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-22 21:52:26,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-22 21:52:26,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-11-22 21:52:26,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2023-11-22 21:52:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2023-11-22 21:52:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2023-11-22 21:52:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2023-11-22 21:52:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#13 [2023-11-22 21:52:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#14 [2023-11-22 21:52:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#15 [2023-11-22 21:52:26,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 21:52:26,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 21:52:26,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 21:52:26,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-22 21:52:26,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2023-11-22 21:52:26,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#13 [2023-11-22 21:52:26,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#14 [2023-11-22 21:52:26,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#15 [2023-11-22 21:52:26,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 21:52:26,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 21:52:26,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 21:52:26,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 21:52:26,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-22 21:52:26,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-22 21:52:26,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-22 21:52:26,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-22 21:52:26,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-22 21:52:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-22 21:52:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-22 21:52:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-22 21:52:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2023-11-22 21:52:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2023-11-22 21:52:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2023-11-22 21:52:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2023-11-22 21:52:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure initWriteBuffer [2023-11-22 21:52:26,665 INFO L138 BoogieDeclarations]: Found implementation of procedure initWriteBuffer [2023-11-22 21:52:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure tso_core_fence [2023-11-22 21:52:26,665 INFO L138 BoogieDeclarations]: Found implementation of procedure tso_core_fence [2023-11-22 21:52:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:52:26,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:52:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:52:26,965 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:52:26,967 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:52:28,455 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:52:28,513 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:52:28,513 INFO L309 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-22 21:52:28,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:52:28 BoogieIcfgContainer [2023-11-22 21:52:28,514 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:52:28,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:52:28,516 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:52:28,518 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:52:28,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:52:25" (1/3) ... [2023-11-22 21:52:28,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1650e102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:52:28, skipping insertion in model container [2023-11-22 21:52:28,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:26" (2/3) ... [2023-11-22 21:52:28,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1650e102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:52:28, skipping insertion in model container [2023-11-22 21:52:28,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:52:28" (3/3) ... [2023-11-22 21:52:28,520 INFO L112 eAbstractionObserver]: Analyzing ICFG 4SB.i [2023-11-22 21:52:28,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:52:28,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:52:28,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:52:28,590 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;@5ccc5919, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:52:28,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:52:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 263 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 233 states have internal predecessors, (371), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-22 21:52:28,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:28,615 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:28,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:28,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:28,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1824283201, now seen corresponding path program 1 times [2023-11-22 21:52:28,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:28,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702789925] [2023-11-22 21:52:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:28,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-22 21:52:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:29,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-22 21:52:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:29,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:52:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:29,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-22 21:52:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:29,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:52:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:29,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-22 21:52:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 21:52:29,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:29,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702789925] [2023-11-22 21:52:29,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702789925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626838609] [2023-11-22 21:52:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:29,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:29,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:29,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:52:29,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 21:52:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:30,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-22 21:52:30,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 21:52:30,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:30,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626838609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:30,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:30,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-11-22 21:52:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876149110] [2023-11-22 21:52:30,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:30,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 21:52:30,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 21:52:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:52:30,262 INFO L87 Difference]: Start difference. First operand has 263 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 233 states have internal predecessors, (371), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:30,974 INFO L93 Difference]: Finished difference Result 524 states and 850 transitions. [2023-11-22 21:52:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 21:52:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2023-11-22 21:52:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:30,984 INFO L225 Difference]: With dead ends: 524 [2023-11-22 21:52:30,985 INFO L226 Difference]: Without dead ends: 251 [2023-11-22 21:52:30,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:52:30,991 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:30,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 350 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 21:52:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-22 21:52:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2023-11-22 21:52:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 217 states have (on average 1.336405529953917) internal successors, (290), 221 states have internal predecessors, (290), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 342 transitions. [2023-11-22 21:52:31,036 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 342 transitions. Word has length 64 [2023-11-22 21:52:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:31,037 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 342 transitions. [2023-11-22 21:52:31,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 342 transitions. [2023-11-22 21:52:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-22 21:52:31,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:31,040 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:31,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-22 21:52:31,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-22 21:52:31,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:31,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1830922863, now seen corresponding path program 1 times [2023-11-22 21:52:31,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:31,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43345133] [2023-11-22 21:52:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:31,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:31,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-22 21:52:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-22 21:52:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:52:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:31,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-22 21:52:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:31,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:52:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:31,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-22 21:52:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 21:52:31,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43345133] [2023-11-22 21:52:31,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43345133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501482878] [2023-11-22 21:52:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:31,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:31,783 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:52:31,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 21:52:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:32,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:52:32,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-22 21:52:32,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:32,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501482878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:32,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:32,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-22 21:52:32,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621169325] [2023-11-22 21:52:32,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:32,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:32,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:32,230 INFO L87 Difference]: Start difference. First operand 251 states and 342 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:52:34,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:52:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:34,231 INFO L93 Difference]: Finished difference Result 501 states and 683 transitions. [2023-11-22 21:52:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 65 [2023-11-22 21:52:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:34,233 INFO L225 Difference]: With dead ends: 501 [2023-11-22 21:52:34,233 INFO L226 Difference]: Without dead ends: 252 [2023-11-22 21:52:34,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:34,235 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 0 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:34,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 653 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-22 21:52:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-22 21:52:34,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-11-22 21:52:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 218 states have (on average 1.334862385321101) internal successors, (291), 222 states have internal predecessors, (291), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 343 transitions. [2023-11-22 21:52:34,246 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 343 transitions. Word has length 65 [2023-11-22 21:52:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:34,246 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 343 transitions. [2023-11-22 21:52:34,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:52:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 343 transitions. [2023-11-22 21:52:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-22 21:52:34,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:34,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:34,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:34,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-22 21:52:34,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:34,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash -394052396, now seen corresponding path program 1 times [2023-11-22 21:52:34,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:34,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341646043] [2023-11-22 21:52:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:34,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:34,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:34,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-22 21:52:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:34,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:52:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:34,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-22 21:52:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:34,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 21:52:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:34,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-22 21:52:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-22 21:52:34,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:34,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341646043] [2023-11-22 21:52:34,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341646043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:34,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233828806] [2023-11-22 21:52:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:34,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:34,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:34,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:52:34,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 21:52:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:35,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:52:35,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 21:52:35,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:35,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233828806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:35,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:35,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:52:35,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600161670] [2023-11-22 21:52:35,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:35,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:35,368 INFO L87 Difference]: Start difference. First operand 252 states and 343 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:37,228 INFO L93 Difference]: Finished difference Result 500 states and 685 transitions. [2023-11-22 21:52:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:37,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-11-22 21:52:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:37,230 INFO L225 Difference]: With dead ends: 500 [2023-11-22 21:52:37,230 INFO L226 Difference]: Without dead ends: 253 [2023-11-22 21:52:37,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:37,231 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 0 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:37,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 652 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-22 21:52:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-22 21:52:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2023-11-22 21:52:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 219 states have (on average 1.3333333333333333) internal successors, (292), 223 states have internal predecessors, (292), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 344 transitions. [2023-11-22 21:52:37,240 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 344 transitions. Word has length 66 [2023-11-22 21:52:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:37,241 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 344 transitions. [2023-11-22 21:52:37,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 344 transitions. [2023-11-22 21:52:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-22 21:52:37,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:37,243 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:37,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:37,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:37,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1859810148, now seen corresponding path program 1 times [2023-11-22 21:52:37,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:37,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172332673] [2023-11-22 21:52:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:37,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:37,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:37,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:52:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:37,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:52:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:37,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:52:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:37,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:52:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:37,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-22 21:52:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-22 21:52:37,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172332673] [2023-11-22 21:52:37,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172332673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359984242] [2023-11-22 21:52:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:37,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:37,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:37,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:52:37,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 21:52:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:38,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:52:38,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-22 21:52:38,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:38,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359984242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:38,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:38,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:52:38,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110515670] [2023-11-22 21:52:38,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:38,478 INFO L87 Difference]: Start difference. First operand 253 states and 344 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:40,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:40,143 INFO L93 Difference]: Finished difference Result 490 states and 666 transitions. [2023-11-22 21:52:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2023-11-22 21:52:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:40,146 INFO L225 Difference]: With dead ends: 490 [2023-11-22 21:52:40,146 INFO L226 Difference]: Without dead ends: 260 [2023-11-22 21:52:40,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:40,147 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:40,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 641 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-22 21:52:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-22 21:52:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2023-11-22 21:52:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 220 states have (on average 1.3318181818181818) internal successors, (293), 224 states have internal predecessors, (293), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 345 transitions. [2023-11-22 21:52:40,158 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 345 transitions. Word has length 70 [2023-11-22 21:52:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:40,158 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 345 transitions. [2023-11-22 21:52:40,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 345 transitions. [2023-11-22 21:52:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-22 21:52:40,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:40,160 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:40,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:40,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:40,361 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:40,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash 712289420, now seen corresponding path program 1 times [2023-11-22 21:52:40,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:40,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467201047] [2023-11-22 21:52:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:40,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:40,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:52:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:40,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:52:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:40,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:52:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:40,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:52:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:40,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-22 21:52:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-22 21:52:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467201047] [2023-11-22 21:52:40,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467201047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915165876] [2023-11-22 21:52:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:40,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:40,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:40,777 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) [2023-11-22 21:52:40,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 21:52:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:41,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:52:41,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-22 21:52:41,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:41,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915165876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:41,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:41,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:52:41,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326578597] [2023-11-22 21:52:41,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:41,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:41,225 INFO L87 Difference]: Start difference. First operand 254 states and 345 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:43,089 INFO L93 Difference]: Finished difference Result 483 states and 656 transitions. [2023-11-22 21:52:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2023-11-22 21:52:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:43,092 INFO L225 Difference]: With dead ends: 483 [2023-11-22 21:52:43,092 INFO L226 Difference]: Without dead ends: 261 [2023-11-22 21:52:43,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:43,093 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 6 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:43,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 644 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-22 21:52:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-22 21:52:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 255. [2023-11-22 21:52:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 221 states have (on average 1.330316742081448) internal successors, (294), 225 states have internal predecessors, (294), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 346 transitions. [2023-11-22 21:52:43,101 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 346 transitions. Word has length 73 [2023-11-22 21:52:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:43,101 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 346 transitions. [2023-11-22 21:52:43,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 346 transitions. [2023-11-22 21:52:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-22 21:52:43,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:43,103 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:43,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:43,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:43,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:43,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash -944166164, now seen corresponding path program 1 times [2023-11-22 21:52:43,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:43,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025683832] [2023-11-22 21:52:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:43,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:43,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:43,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:52:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:43,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:52:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:43,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:52:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:43,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:52:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:43,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-22 21:52:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-22 21:52:43,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:43,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025683832] [2023-11-22 21:52:43,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025683832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:43,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776511618] [2023-11-22 21:52:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:43,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:43,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:43,717 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) [2023-11-22 21:52:43,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 21:52:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:44,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:52:44,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-22 21:52:44,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:44,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776511618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:44,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:44,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:52:44,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323169602] [2023-11-22 21:52:44,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:44,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:44,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:44,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:44,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:44,225 INFO L87 Difference]: Start difference. First operand 255 states and 346 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:45,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:52:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:46,093 INFO L93 Difference]: Finished difference Result 476 states and 646 transitions. [2023-11-22 21:52:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:46,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2023-11-22 21:52:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:46,095 INFO L225 Difference]: With dead ends: 476 [2023-11-22 21:52:46,095 INFO L226 Difference]: Without dead ends: 262 [2023-11-22 21:52:46,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:46,096 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 6 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:46,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 640 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-22 21:52:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-22 21:52:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2023-11-22 21:52:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 222 states have (on average 1.3288288288288288) internal successors, (295), 226 states have internal predecessors, (295), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 347 transitions. [2023-11-22 21:52:46,103 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 347 transitions. Word has length 76 [2023-11-22 21:52:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:46,104 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 347 transitions. [2023-11-22 21:52:46,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 347 transitions. [2023-11-22 21:52:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-22 21:52:46,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:46,105 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:46,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:46,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:46,318 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:46,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:46,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1142732580, now seen corresponding path program 1 times [2023-11-22 21:52:46,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:46,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522482338] [2023-11-22 21:52:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:46,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:52:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:46,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:52:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:52:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:46,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:52:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-22 21:52:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 21:52:46,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522482338] [2023-11-22 21:52:46,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522482338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756137685] [2023-11-22 21:52:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:46,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:46,751 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) [2023-11-22 21:52:46,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 21:52:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:47,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:52:47,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-22 21:52:47,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:47,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756137685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:47,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:47,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:52:47,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535749979] [2023-11-22 21:52:47,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:47,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:47,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:47,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:47,225 INFO L87 Difference]: Start difference. First operand 256 states and 347 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:48,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:52:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:49,334 INFO L93 Difference]: Finished difference Result 467 states and 635 transitions. [2023-11-22 21:52:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 79 [2023-11-22 21:52:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:49,335 INFO L225 Difference]: With dead ends: 467 [2023-11-22 21:52:49,335 INFO L226 Difference]: Without dead ends: 263 [2023-11-22 21:52:49,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:49,336 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:49,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 641 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-22 21:52:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-11-22 21:52:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2023-11-22 21:52:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 223 states have (on average 1.3273542600896862) internal successors, (296), 227 states have internal predecessors, (296), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions. [2023-11-22 21:52:49,348 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 79 [2023-11-22 21:52:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:49,349 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions. [2023-11-22 21:52:49,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:52:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions. [2023-11-22 21:52:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-22 21:52:49,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:49,350 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:49,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:49,560 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:49,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:49,561 INFO L85 PathProgramCache]: Analyzing trace with hash 818065724, now seen corresponding path program 1 times [2023-11-22 21:52:49,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:49,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543320573] [2023-11-22 21:52:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:49,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:49,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:52:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:49,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:52:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:49,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:52:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:49,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:52:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:49,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:52:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-22 21:52:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:49,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543320573] [2023-11-22 21:52:49,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543320573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016925172] [2023-11-22 21:52:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:49,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:49,960 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) [2023-11-22 21:52:49,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 21:52:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:50,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:52:50,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-22 21:52:50,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016925172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:50,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:50,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:52:50,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430443900] [2023-11-22 21:52:50,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:50,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:50,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:50,456 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:52:52,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:52:52,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:52,632 INFO L93 Difference]: Finished difference Result 325 states and 455 transitions. [2023-11-22 21:52:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:52,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 82 [2023-11-22 21:52:52,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:52,634 INFO L225 Difference]: With dead ends: 325 [2023-11-22 21:52:52,634 INFO L226 Difference]: Without dead ends: 315 [2023-11-22 21:52:52,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:52,634 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 93 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:52,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 561 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-22 21:52:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-22 21:52:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 258. [2023-11-22 21:52:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 224 states have (on average 1.3258928571428572) internal successors, (297), 228 states have internal predecessors, (297), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 349 transitions. [2023-11-22 21:52:52,641 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 349 transitions. Word has length 82 [2023-11-22 21:52:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:52,641 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 349 transitions. [2023-11-22 21:52:52,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:52:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 349 transitions. [2023-11-22 21:52:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-22 21:52:52,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:52,643 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:52,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:52,855 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,SelfDestructingSolverStorable7 [2023-11-22 21:52:52,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:52,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1805887728, now seen corresponding path program 1 times [2023-11-22 21:52:52,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:52,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597455559] [2023-11-22 21:52:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:52,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:53,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:53,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:52:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:52:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:53,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:52:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:53,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:52:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:53,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:52:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-22 21:52:53,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:53,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597455559] [2023-11-22 21:52:53,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597455559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:53,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279782076] [2023-11-22 21:52:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:53,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:53,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:53,267 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) [2023-11-22 21:52:53,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 21:52:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:53,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:52:53,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-22 21:52:53,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279782076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:53,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:52:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368528225] [2023-11-22 21:52:53,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:53,816 INFO L87 Difference]: Start difference. First operand 258 states and 349 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:52:55,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:52:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:55,907 INFO L93 Difference]: Finished difference Result 326 states and 456 transitions. [2023-11-22 21:52:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:55,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 92 [2023-11-22 21:52:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:55,910 INFO L225 Difference]: With dead ends: 326 [2023-11-22 21:52:55,910 INFO L226 Difference]: Without dead ends: 316 [2023-11-22 21:52:55,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:55,911 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 83 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:55,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 648 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-22 21:52:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-22 21:52:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2023-11-22 21:52:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 281 states have (on average 1.387900355871886) internal successors, (390), 285 states have internal predecessors, (390), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 442 transitions. [2023-11-22 21:52:55,921 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 442 transitions. Word has length 92 [2023-11-22 21:52:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:55,921 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 442 transitions. [2023-11-22 21:52:55,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:52:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 442 transitions. [2023-11-22 21:52:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-22 21:52:55,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:55,923 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:55,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:56,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:56,123 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:56,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash 78997952, now seen corresponding path program 1 times [2023-11-22 21:52:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:56,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811123940] [2023-11-22 21:52:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:56,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:52:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:56,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:52:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:52:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:56,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:52:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:56,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:52:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-22 21:52:56,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:56,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811123940] [2023-11-22 21:52:56,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811123940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:56,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385031460] [2023-11-22 21:52:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:56,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:56,565 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) [2023-11-22 21:52:56,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 21:52:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:57,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:52:57,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:52:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-22 21:52:57,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:52:57,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385031460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:52:57,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:52:57,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:52:57,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157381059] [2023-11-22 21:52:57,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:52:57,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:52:57,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:52:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:52:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:57,163 INFO L87 Difference]: Start difference. First operand 315 states and 442 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:52:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:52:59,112 INFO L93 Difference]: Finished difference Result 441 states and 643 transitions. [2023-11-22 21:52:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:52:59,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 98 [2023-11-22 21:52:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:52:59,115 INFO L225 Difference]: With dead ends: 441 [2023-11-22 21:52:59,115 INFO L226 Difference]: Without dead ends: 431 [2023-11-22 21:52:59,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:52:59,115 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 77 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:52:59,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 648 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-22 21:52:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-22 21:52:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2023-11-22 21:52:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 397 states have (on average 1.455919395465995) internal successors, (578), 401 states have internal predecessors, (578), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:52:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 630 transitions. [2023-11-22 21:52:59,124 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 630 transitions. Word has length 98 [2023-11-22 21:52:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:52:59,125 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 630 transitions. [2023-11-22 21:52:59,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:52:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 630 transitions. [2023-11-22 21:52:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-22 21:52:59,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:52:59,126 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:52:59,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 21:52:59,339 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,SelfDestructingSolverStorable9 [2023-11-22 21:52:59,339 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:52:59,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:52:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1574632082, now seen corresponding path program 1 times [2023-11-22 21:52:59,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:52:59,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294861996] [2023-11-22 21:52:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:59,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:52:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:59,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:52:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:59,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:52:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:59,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:52:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:59,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:52:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:59,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:52:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:59,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:52:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:52:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 21:52:59,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:52:59,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294861996] [2023-11-22 21:52:59,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294861996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:52:59,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510290568] [2023-11-22 21:52:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:52:59,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:52:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:52:59,743 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) [2023-11-22 21:52:59,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 21:53:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:00,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:00,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-22 21:53:00,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:00,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510290568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:00,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:00,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065447074] [2023-11-22 21:53:00,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:00,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:00,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:00,335 INFO L87 Difference]: Start difference. First operand 431 states and 630 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:01,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:03,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:03,238 INFO L93 Difference]: Finished difference Result 721 states and 1095 transitions. [2023-11-22 21:53:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:03,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-11-22 21:53:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:03,241 INFO L225 Difference]: With dead ends: 721 [2023-11-22 21:53:03,241 INFO L226 Difference]: Without dead ends: 479 [2023-11-22 21:53:03,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:03,242 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 21 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:03,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 969 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-22 21:53:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-22 21:53:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 439. [2023-11-22 21:53:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 405 states have (on average 1.4469135802469135) internal successors, (586), 409 states have internal predecessors, (586), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 638 transitions. [2023-11-22 21:53:03,252 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 638 transitions. Word has length 136 [2023-11-22 21:53:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:03,252 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 638 transitions. [2023-11-22 21:53:03,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 638 transitions. [2023-11-22 21:53:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-22 21:53:03,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:03,254 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:03,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:03,472 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,SelfDestructingSolverStorable10 [2023-11-22 21:53:03,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2018735340, now seen corresponding path program 1 times [2023-11-22 21:53:03,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:03,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660373294] [2023-11-22 21:53:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:03,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:03,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:03,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:03,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:03,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 21:53:03,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:03,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660373294] [2023-11-22 21:53:03,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660373294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:03,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762940299] [2023-11-22 21:53:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:03,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:03,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:03,892 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) [2023-11-22 21:53:03,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 21:53:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:04,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:04,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-22 21:53:04,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762940299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:04,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:04,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606664436] [2023-11-22 21:53:04,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:04,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:04,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:04,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:04,447 INFO L87 Difference]: Start difference. First operand 439 states and 638 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:06,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:07,439 INFO L93 Difference]: Finished difference Result 721 states and 1087 transitions. [2023-11-22 21:53:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:07,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-11-22 21:53:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:07,441 INFO L225 Difference]: With dead ends: 721 [2023-11-22 21:53:07,441 INFO L226 Difference]: Without dead ends: 471 [2023-11-22 21:53:07,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:07,442 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 12 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:07,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 966 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-22 21:53:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-22 21:53:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 447. [2023-11-22 21:53:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 413 states have (on average 1.4382566585956416) internal successors, (594), 417 states have internal predecessors, (594), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 646 transitions. [2023-11-22 21:53:07,450 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 646 transitions. Word has length 136 [2023-11-22 21:53:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:07,451 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 646 transitions. [2023-11-22 21:53:07,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 646 transitions. [2023-11-22 21:53:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-22 21:53:07,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:07,452 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:07,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:07,665 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,SelfDestructingSolverStorable11 [2023-11-22 21:53:07,665 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:07,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:07,666 INFO L85 PathProgramCache]: Analyzing trace with hash -632531946, now seen corresponding path program 1 times [2023-11-22 21:53:07,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:07,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688099400] [2023-11-22 21:53:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:07,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:07,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:07,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:07,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:07,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 21:53:08,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:08,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688099400] [2023-11-22 21:53:08,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688099400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:08,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914411400] [2023-11-22 21:53:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:08,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:08,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:08,070 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) [2023-11-22 21:53:08,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 21:53:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:08,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:08,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-22 21:53:08,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:08,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914411400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:08,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:08,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824226422] [2023-11-22 21:53:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:08,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:08,679 INFO L87 Difference]: Start difference. First operand 447 states and 646 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:11,189 INFO L93 Difference]: Finished difference Result 721 states and 1079 transitions. [2023-11-22 21:53:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-11-22 21:53:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:11,191 INFO L225 Difference]: With dead ends: 721 [2023-11-22 21:53:11,191 INFO L226 Difference]: Without dead ends: 463 [2023-11-22 21:53:11,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:11,192 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 3 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:11,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 965 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-22 21:53:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-22 21:53:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 459. [2023-11-22 21:53:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 425 states have (on average 1.4258823529411764) internal successors, (606), 429 states have internal predecessors, (606), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 658 transitions. [2023-11-22 21:53:11,200 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 658 transitions. Word has length 136 [2023-11-22 21:53:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:11,200 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 658 transitions. [2023-11-22 21:53:11,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 658 transitions. [2023-11-22 21:53:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-22 21:53:11,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:11,201 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:11,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:11,414 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,SelfDestructingSolverStorable12 [2023-11-22 21:53:11,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:11,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:11,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1290696088, now seen corresponding path program 1 times [2023-11-22 21:53:11,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:11,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535480937] [2023-11-22 21:53:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:11,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:11,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:11,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:11,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:11,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:11,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 21:53:11,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:11,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535480937] [2023-11-22 21:53:11,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535480937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:11,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123839887] [2023-11-22 21:53:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:11,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:11,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:11,816 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) [2023-11-22 21:53:11,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 21:53:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:12,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:12,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-22 21:53:12,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:12,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123839887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:12,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:12,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:12,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221480355] [2023-11-22 21:53:12,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:12,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:12,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:12,448 INFO L87 Difference]: Start difference. First operand 459 states and 658 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:14,957 INFO L93 Difference]: Finished difference Result 761 states and 1127 transitions. [2023-11-22 21:53:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-11-22 21:53:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:14,959 INFO L225 Difference]: With dead ends: 761 [2023-11-22 21:53:14,959 INFO L226 Difference]: Without dead ends: 491 [2023-11-22 21:53:14,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:14,960 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 12 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:14,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 966 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-22 21:53:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-11-22 21:53:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 467. [2023-11-22 21:53:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 433 states have (on average 1.418013856812933) internal successors, (614), 437 states have internal predecessors, (614), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 666 transitions. [2023-11-22 21:53:14,967 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 666 transitions. Word has length 136 [2023-11-22 21:53:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:14,968 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 666 transitions. [2023-11-22 21:53:14,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 666 transitions. [2023-11-22 21:53:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-22 21:53:14,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:14,969 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:14,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:15,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:15,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:15,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash -514742246, now seen corresponding path program 1 times [2023-11-22 21:53:15,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:15,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329290412] [2023-11-22 21:53:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:15,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:15,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:15,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:15,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:15,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:15,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:15,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 21:53:15,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:15,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329290412] [2023-11-22 21:53:15,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329290412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:15,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396830372] [2023-11-22 21:53:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:15,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:15,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:15,585 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) [2023-11-22 21:53:15,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 21:53:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:16,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:16,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-22 21:53:16,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:16,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396830372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:16,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:16,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:16,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552835027] [2023-11-22 21:53:16,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:16,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:16,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:16,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:16,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:16,205 INFO L87 Difference]: Start difference. First operand 467 states and 666 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:18,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:18,765 INFO L93 Difference]: Finished difference Result 761 states and 1119 transitions. [2023-11-22 21:53:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:18,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-11-22 21:53:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:18,767 INFO L225 Difference]: With dead ends: 761 [2023-11-22 21:53:18,767 INFO L226 Difference]: Without dead ends: 483 [2023-11-22 21:53:18,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:18,768 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 3 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:18,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 965 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-22 21:53:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-22 21:53:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 479. [2023-11-22 21:53:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 445 states have (on average 1.4067415730337078) internal successors, (626), 449 states have internal predecessors, (626), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 678 transitions. [2023-11-22 21:53:18,775 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 678 transitions. Word has length 136 [2023-11-22 21:53:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:18,775 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 678 transitions. [2023-11-22 21:53:18,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 678 transitions. [2023-11-22 21:53:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-22 21:53:18,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:18,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:18,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:18,977 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,SelfDestructingSolverStorable14 [2023-11-22 21:53:18,977 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:18,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash -92040420, now seen corresponding path program 1 times [2023-11-22 21:53:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:18,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71915343] [2023-11-22 21:53:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:18,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:19,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:19,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:19,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:19,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:19,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:19,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 21:53:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71915343] [2023-11-22 21:53:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71915343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604737833] [2023-11-22 21:53:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:19,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:19,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:19,367 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) [2023-11-22 21:53:19,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 21:53:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:19,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:19,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-22 21:53:19,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:19,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604737833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:19,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:19,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175534474] [2023-11-22 21:53:19,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:19,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:19,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:19,996 INFO L87 Difference]: Start difference. First operand 479 states and 678 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:21,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:22,945 INFO L93 Difference]: Finished difference Result 801 states and 1167 transitions. [2023-11-22 21:53:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:22,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-11-22 21:53:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:22,947 INFO L225 Difference]: With dead ends: 801 [2023-11-22 21:53:22,947 INFO L226 Difference]: Without dead ends: 511 [2023-11-22 21:53:22,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:22,948 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 12 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:22,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 966 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-22 21:53:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2023-11-22 21:53:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 487. [2023-11-22 21:53:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 453 states have (on average 1.3995584988962473) internal successors, (634), 457 states have internal predecessors, (634), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 686 transitions. [2023-11-22 21:53:22,956 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 686 transitions. Word has length 136 [2023-11-22 21:53:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:22,956 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 686 transitions. [2023-11-22 21:53:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 686 transitions. [2023-11-22 21:53:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-22 21:53:22,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:22,958 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:22,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-22 21:53:23,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 21:53:23,172 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:23,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1371904098, now seen corresponding path program 1 times [2023-11-22 21:53:23,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:23,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119050070] [2023-11-22 21:53:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:23,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:23,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:23,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:23,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:23,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:23,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:23,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 21:53:23,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:23,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119050070] [2023-11-22 21:53:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119050070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35081021] [2023-11-22 21:53:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:23,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:23,576 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) [2023-11-22 21:53:23,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 21:53:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:24,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:24,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-22 21:53:24,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:24,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35081021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:24,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:24,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:24,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021974527] [2023-11-22 21:53:24,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:24,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:24,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:24,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:24,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:24,200 INFO L87 Difference]: Start difference. First operand 487 states and 686 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:26,389 INFO L93 Difference]: Finished difference Result 801 states and 1159 transitions. [2023-11-22 21:53:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:26,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-11-22 21:53:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:26,390 INFO L225 Difference]: With dead ends: 801 [2023-11-22 21:53:26,391 INFO L226 Difference]: Without dead ends: 503 [2023-11-22 21:53:26,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:26,391 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 3 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:26,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 965 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-22 21:53:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-11-22 21:53:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 499. [2023-11-22 21:53:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 465 states have (on average 1.389247311827957) internal successors, (646), 469 states have internal predecessors, (646), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 698 transitions. [2023-11-22 21:53:26,399 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 698 transitions. Word has length 136 [2023-11-22 21:53:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:26,399 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 698 transitions. [2023-11-22 21:53:26,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 698 transitions. [2023-11-22 21:53:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-22 21:53:26,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:26,401 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:26,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:26,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 21:53:26,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:26,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1496307482, now seen corresponding path program 1 times [2023-11-22 21:53:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802432229] [2023-11-22 21:53:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:26,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:26,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:26,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:26,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:26,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:26,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 21:53:27,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:27,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802432229] [2023-11-22 21:53:27,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802432229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:27,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710546432] [2023-11-22 21:53:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:27,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:27,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:27,011 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) [2023-11-22 21:53:27,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 21:53:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:27,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:27,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-22 21:53:27,706 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710546432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:27,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:27,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:53:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201948842] [2023-11-22 21:53:27,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:53:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:53:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:27,707 INFO L87 Difference]: Start difference. First operand 499 states and 698 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:28,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:29,730 INFO L93 Difference]: Finished difference Result 809 states and 1155 transitions. [2023-11-22 21:53:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:53:29,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2023-11-22 21:53:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:29,733 INFO L225 Difference]: With dead ends: 809 [2023-11-22 21:53:29,733 INFO L226 Difference]: Without dead ends: 799 [2023-11-22 21:53:29,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:29,733 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 54 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:29,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 649 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-22 21:53:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-22 21:53:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2023-11-22 21:53:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 765 states have (on average 1.4248366013071896) internal successors, (1090), 769 states have internal predecessors, (1090), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1142 transitions. [2023-11-22 21:53:29,743 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1142 transitions. Word has length 136 [2023-11-22 21:53:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:29,744 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1142 transitions. [2023-11-22 21:53:29,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1142 transitions. [2023-11-22 21:53:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-22 21:53:29,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:29,746 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:29,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-22 21:53:29,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-22 21:53:29,961 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:29,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:29,961 INFO L85 PathProgramCache]: Analyzing trace with hash 429752270, now seen corresponding path program 1 times [2023-11-22 21:53:29,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:29,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161874699] [2023-11-22 21:53:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:29,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:30,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:30,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:30,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:30,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-22 21:53:30,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:30,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161874699] [2023-11-22 21:53:30,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161874699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:30,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102914624] [2023-11-22 21:53:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:30,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:30,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:30,357 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) [2023-11-22 21:53:30,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 21:53:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:31,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:31,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 21:53:31,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:31,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102914624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:31,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:31,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:53:31,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821294864] [2023-11-22 21:53:31,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:31,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:53:31,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:31,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:53:31,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:31,128 INFO L87 Difference]: Start difference. First operand 799 states and 1142 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:32,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:33,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:33,365 INFO L93 Difference]: Finished difference Result 1409 states and 2043 transitions. [2023-11-22 21:53:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:53:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 146 [2023-11-22 21:53:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:33,369 INFO L225 Difference]: With dead ends: 1409 [2023-11-22 21:53:33,369 INFO L226 Difference]: Without dead ends: 1399 [2023-11-22 21:53:33,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:33,371 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 53 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:33,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 647 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-22 21:53:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2023-11-22 21:53:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1399. [2023-11-22 21:53:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1365 states have (on average 1.449084249084249) internal successors, (1978), 1369 states have internal predecessors, (1978), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2030 transitions. [2023-11-22 21:53:33,392 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2030 transitions. Word has length 146 [2023-11-22 21:53:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:33,392 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 2030 transitions. [2023-11-22 21:53:33,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2030 transitions. [2023-11-22 21:53:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-22 21:53:33,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:33,395 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:33,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:33,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:33,614 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:33,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 864093632, now seen corresponding path program 1 times [2023-11-22 21:53:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:33,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580977766] [2023-11-22 21:53:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:33,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:33,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:33,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:33,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:33,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-11-22 21:53:34,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:34,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580977766] [2023-11-22 21:53:34,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580977766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:34,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313581037] [2023-11-22 21:53:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:34,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:34,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:34,034 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:53:34,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 21:53:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:34,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:34,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-22 21:53:34,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:34,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313581037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:34,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:34,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299300439] [2023-11-22 21:53:34,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:34,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:34,744 INFO L87 Difference]: Start difference. First operand 1399 states and 2030 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:35,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:37,523 INFO L93 Difference]: Finished difference Result 2673 states and 3931 transitions. [2023-11-22 21:53:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 190 [2023-11-22 21:53:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:37,527 INFO L225 Difference]: With dead ends: 2673 [2023-11-22 21:53:37,527 INFO L226 Difference]: Without dead ends: 1463 [2023-11-22 21:53:37,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:37,529 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 3 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:37,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 965 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-22 21:53:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2023-11-22 21:53:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1447. [2023-11-22 21:53:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1413 states have (on average 1.4338287331917905) internal successors, (2026), 1417 states have internal predecessors, (2026), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2078 transitions. [2023-11-22 21:53:37,549 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2078 transitions. Word has length 190 [2023-11-22 21:53:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:37,550 INFO L495 AbstractCegarLoop]: Abstraction has 1447 states and 2078 transitions. [2023-11-22 21:53:37,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2078 transitions. [2023-11-22 21:53:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-22 21:53:37,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:37,552 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:37,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:37,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:37,772 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:37,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash 420192958, now seen corresponding path program 1 times [2023-11-22 21:53:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:37,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106132526] [2023-11-22 21:53:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:37,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:38,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:38,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:38,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:38,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:38,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:38,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-11-22 21:53:38,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106132526] [2023-11-22 21:53:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106132526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975713066] [2023-11-22 21:53:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:38,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:38,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:38,208 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:53:38,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 21:53:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:38,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:38,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-11-22 21:53:39,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:39,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975713066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:39,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:53:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13329058] [2023-11-22 21:53:39,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:39,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:53:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:53:39,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:39,087 INFO L87 Difference]: Start difference. First operand 1447 states and 2078 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:40,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:41,256 INFO L93 Difference]: Finished difference Result 2705 states and 3915 transitions. [2023-11-22 21:53:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:53:41,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 190 [2023-11-22 21:53:41,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:41,263 INFO L225 Difference]: With dead ends: 2705 [2023-11-22 21:53:41,263 INFO L226 Difference]: Without dead ends: 2695 [2023-11-22 21:53:41,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:41,265 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 43 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:41,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 648 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-22 21:53:41,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2023-11-22 21:53:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2695. [2023-11-22 21:53:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2661 states have (on average 1.4468245020668922) internal successors, (3850), 2665 states have internal predecessors, (3850), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 3902 transitions. [2023-11-22 21:53:41,301 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 3902 transitions. Word has length 190 [2023-11-22 21:53:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:41,301 INFO L495 AbstractCegarLoop]: Abstraction has 2695 states and 3902 transitions. [2023-11-22 21:53:41,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 3902 transitions. [2023-11-22 21:53:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-22 21:53:41,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:41,306 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:41,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:41,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:41,520 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:41,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:41,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2126316818, now seen corresponding path program 1 times [2023-11-22 21:53:41,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:41,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274533099] [2023-11-22 21:53:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:41,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:41,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:41,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:41,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:41,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:41,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:41,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-22 21:53:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274533099] [2023-11-22 21:53:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274533099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590201726] [2023-11-22 21:53:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:41,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:41,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:41,977 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:53:41,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 21:53:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:42,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:42,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-11-22 21:53:42,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:42,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590201726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:42,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:42,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:53:42,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859231172] [2023-11-22 21:53:42,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:42,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:53:42,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:42,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:53:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:42,860 INFO L87 Difference]: Start difference. First operand 2695 states and 3902 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:44,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:44,861 INFO L93 Difference]: Finished difference Result 5201 states and 7563 transitions. [2023-11-22 21:53:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:53:44,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2023-11-22 21:53:44,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:44,873 INFO L225 Difference]: With dead ends: 5201 [2023-11-22 21:53:44,874 INFO L226 Difference]: Without dead ends: 5191 [2023-11-22 21:53:44,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:44,875 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 38 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:44,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 647 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-22 21:53:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2023-11-22 21:53:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 5191. [2023-11-22 21:53:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5191 states, 5157 states have (on average 1.4539460926895482) internal successors, (7498), 5161 states have internal predecessors, (7498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:44,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 7550 transitions. [2023-11-22 21:53:44,953 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 7550 transitions. Word has length 214 [2023-11-22 21:53:44,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:44,953 INFO L495 AbstractCegarLoop]: Abstraction has 5191 states and 7550 transitions. [2023-11-22 21:53:44,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 7550 transitions. [2023-11-22 21:53:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-11-22 21:53:44,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:44,961 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:44,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:45,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:45,176 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1074284310, now seen corresponding path program 1 times [2023-11-22 21:53:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624238630] [2023-11-22 21:53:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:45,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:45,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:45,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:45,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:45,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:45,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-22 21:53:45,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:45,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624238630] [2023-11-22 21:53:45,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624238630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:45,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831833160] [2023-11-22 21:53:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:45,627 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:53:45,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 21:53:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:46,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:46,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-11-22 21:53:46,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:46,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831833160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:46,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:46,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:53:46,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636141593] [2023-11-22 21:53:46,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:46,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:53:46,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:53:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:46,574 INFO L87 Difference]: Start difference. First operand 5191 states and 7550 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:48,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:48,694 INFO L93 Difference]: Finished difference Result 10193 states and 14859 transitions. [2023-11-22 21:53:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:53:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 244 [2023-11-22 21:53:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:48,718 INFO L225 Difference]: With dead ends: 10193 [2023-11-22 21:53:48,718 INFO L226 Difference]: Without dead ends: 10183 [2023-11-22 21:53:48,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:48,722 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 34 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:48,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 648 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-22 21:53:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10183 states. [2023-11-22 21:53:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10183 to 10183. [2023-11-22 21:53:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10183 states, 10149 states have (on average 1.4576805596610503) internal successors, (14794), 10153 states have internal predecessors, (14794), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10183 states to 10183 states and 14846 transitions. [2023-11-22 21:53:48,840 INFO L78 Accepts]: Start accepts. Automaton has 10183 states and 14846 transitions. Word has length 244 [2023-11-22 21:53:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:48,841 INFO L495 AbstractCegarLoop]: Abstraction has 10183 states and 14846 transitions. [2023-11-22 21:53:48,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 10183 states and 14846 transitions. [2023-11-22 21:53:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-22 21:53:48,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:48,855 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:48,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:49,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:49,068 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:49,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:49,069 INFO L85 PathProgramCache]: Analyzing trace with hash 143349432, now seen corresponding path program 1 times [2023-11-22 21:53:49,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:49,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793320823] [2023-11-22 21:53:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:49,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:49,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:49,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:49,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:49,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:49,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:49,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-11-22 21:53:49,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:49,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793320823] [2023-11-22 21:53:49,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793320823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:49,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570521820] [2023-11-22 21:53:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:49,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:49,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:49,530 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:53:49,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 21:53:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:50,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:50,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-11-22 21:53:50,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570521820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:50,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:50,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:53:50,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998181173] [2023-11-22 21:53:50,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:50,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:53:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:50,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:53:50,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:53:50,414 INFO L87 Difference]: Start difference. First operand 10183 states and 14846 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:51,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:52,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:53:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:53,696 INFO L93 Difference]: Finished difference Result 20689 states and 30347 transitions. [2023-11-22 21:53:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:53:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 296 [2023-11-22 21:53:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:53,716 INFO L225 Difference]: With dead ends: 20689 [2023-11-22 21:53:53,717 INFO L226 Difference]: Without dead ends: 10695 [2023-11-22 21:53:53,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:53:53,728 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 3 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:53,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 965 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-22 21:53:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2023-11-22 21:53:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 10567. [2023-11-22 21:53:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10567 states, 10533 states have (on average 1.4409949681951961) internal successors, (15178), 10537 states have internal predecessors, (15178), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10567 states to 10567 states and 15230 transitions. [2023-11-22 21:53:53,859 INFO L78 Accepts]: Start accepts. Automaton has 10567 states and 15230 transitions. Word has length 296 [2023-11-22 21:53:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:53,860 INFO L495 AbstractCegarLoop]: Abstraction has 10567 states and 15230 transitions. [2023-11-22 21:53:53,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10567 states and 15230 transitions. [2023-11-22 21:53:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-22 21:53:53,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:53,875 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:53,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:54,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:54,088 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:54,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1303231434, now seen corresponding path program 1 times [2023-11-22 21:53:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:54,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555946500] [2023-11-22 21:53:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:54,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:54,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:54,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:54,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:54,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:54,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-11-22 21:53:54,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:54,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555946500] [2023-11-22 21:53:54,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555946500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:54,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757291337] [2023-11-22 21:53:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:54,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:54,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:54,531 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:53:54,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 21:53:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:55,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:53:55,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-22 21:53:55,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:55,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757291337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:55,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:55,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:53:55,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355379681] [2023-11-22 21:53:55,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:55,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:53:55,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:53:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:55,621 INFO L87 Difference]: Start difference. First operand 10567 states and 15230 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:53:57,514 INFO L93 Difference]: Finished difference Result 20945 states and 30219 transitions. [2023-11-22 21:53:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:53:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 296 [2023-11-22 21:53:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:53:57,542 INFO L225 Difference]: With dead ends: 20945 [2023-11-22 21:53:57,542 INFO L226 Difference]: Without dead ends: 20935 [2023-11-22 21:53:57,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:57,549 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 23 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-22 21:53:57,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 647 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-22 21:53:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20935 states. [2023-11-22 21:53:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20935 to 20935. [2023-11-22 21:53:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20935 states, 20901 states have (on average 1.4427060906176739) internal successors, (30154), 20905 states have internal predecessors, (30154), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:53:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20935 states to 20935 states and 30206 transitions. [2023-11-22 21:53:57,775 INFO L78 Accepts]: Start accepts. Automaton has 20935 states and 30206 transitions. Word has length 296 [2023-11-22 21:53:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:53:57,775 INFO L495 AbstractCegarLoop]: Abstraction has 20935 states and 30206 transitions. [2023-11-22 21:53:57,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:53:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 20935 states and 30206 transitions. [2023-11-22 21:53:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-22 21:53:57,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:53:57,807 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:53:57,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-22 21:53:58,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-22 21:53:58,025 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:53:58,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:53:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1771531892, now seen corresponding path program 1 times [2023-11-22 21:53:58,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:53:58,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256675762] [2023-11-22 21:53:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:53:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:58,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:53:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:58,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:53:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:58,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:53:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:58,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:53:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:58,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:53:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:58,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:53:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-11-22 21:53:58,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:53:58,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256675762] [2023-11-22 21:53:58,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256675762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:53:58,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592380699] [2023-11-22 21:53:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:53:58,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:53:58,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:53:58,516 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:53:58,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 21:53:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:53:59,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:53:59,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:53:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-11-22 21:53:59,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:53:59,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592380699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:53:59,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:53:59,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-22 21:53:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875899195] [2023-11-22 21:53:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:53:59,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:53:59,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:53:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:53:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:53:59,425 INFO L87 Difference]: Start difference. First operand 20935 states and 30206 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:54:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:54:01,435 INFO L93 Difference]: Finished difference Result 31569 states and 45707 transitions. [2023-11-22 21:54:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:54:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 354 [2023-11-22 21:54:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:54:01,462 INFO L225 Difference]: With dead ends: 31569 [2023-11-22 21:54:01,462 INFO L226 Difference]: Without dead ends: 21191 [2023-11-22 21:54:01,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:54:01,478 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 0 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:54:01,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 647 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-22 21:54:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21191 states. [2023-11-22 21:54:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21191 to 21191. [2023-11-22 21:54:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21191 states, 21157 states have (on average 1.4373493406437585) internal successors, (30410), 21161 states have internal predecessors, (30410), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:54:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21191 states to 21191 states and 30462 transitions. [2023-11-22 21:54:01,696 INFO L78 Accepts]: Start accepts. Automaton has 21191 states and 30462 transitions. Word has length 354 [2023-11-22 21:54:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:54:01,697 INFO L495 AbstractCegarLoop]: Abstraction has 21191 states and 30462 transitions. [2023-11-22 21:54:01,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:54:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 21191 states and 30462 transitions. [2023-11-22 21:54:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-22 21:54:01,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:54:01,734 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:54:01,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-22 21:54:01,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-22 21:54:01,950 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:54:01,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:54:01,950 INFO L85 PathProgramCache]: Analyzing trace with hash 196273034, now seen corresponding path program 1 times [2023-11-22 21:54:01,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:54:01,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346390960] [2023-11-22 21:54:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:01,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:54:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:02,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:54:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:02,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:54:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:02,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:54:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:02,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-22 21:54:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:02,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-22 21:54:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:02,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-22 21:54:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-11-22 21:54:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:54:02,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346390960] [2023-11-22 21:54:02,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346390960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:54:02,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050428755] [2023-11-22 21:54:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:02,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:02,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:54:02,498 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:54:02,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 21:54:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:03,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:54:03,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:54:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-11-22 21:54:03,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:54:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-11-22 21:54:03,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050428755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:54:03,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:54:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 4] total 8 [2023-11-22 21:54:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518582233] [2023-11-22 21:54:03,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:54:03,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 21:54:03,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:54:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 21:54:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:54:03,493 INFO L87 Difference]: Start difference. First operand 21191 states and 30462 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-22 21:54:05,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:54:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:54:09,935 INFO L93 Difference]: Finished difference Result 42382 states and 60926 transitions. [2023-11-22 21:54:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:54:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 354 [2023-11-22 21:54:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:54:09,958 INFO L225 Difference]: With dead ends: 42382 [2023-11-22 21:54:09,958 INFO L226 Difference]: Without dead ends: 21194 [2023-11-22 21:54:09,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:54:09,981 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 1 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-22 21:54:09,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2121 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-11-22 21:54:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21194 states. [2023-11-22 21:54:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21194 to 21194. [2023-11-22 21:54:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21194 states, 21160 states have (on average 1.4372873345935728) internal successors, (30413), 21164 states have internal predecessors, (30413), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:54:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21194 states to 21194 states and 30465 transitions. [2023-11-22 21:54:10,205 INFO L78 Accepts]: Start accepts. Automaton has 21194 states and 30465 transitions. Word has length 354 [2023-11-22 21:54:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:54:10,206 INFO L495 AbstractCegarLoop]: Abstraction has 21194 states and 30465 transitions. [2023-11-22 21:54:10,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-22 21:54:10,206 INFO L276 IsEmpty]: Start isEmpty. Operand 21194 states and 30465 transitions. [2023-11-22 21:54:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2023-11-22 21:54:10,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:54:10,226 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:54:10,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-22 21:54:10,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-22 21:54:10,451 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:54:10,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:54:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash 408445191, now seen corresponding path program 2 times [2023-11-22 21:54:10,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:54:10,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774235312] [2023-11-22 21:54:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:10,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:54:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:10,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:54:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:10,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:54:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-22 21:54:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:10,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 21:54:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:10,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-22 21:54:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:10,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-22 21:54:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2023-11-22 21:54:10,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:54:10,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774235312] [2023-11-22 21:54:10,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774235312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:54:10,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416829885] [2023-11-22 21:54:10,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:54:10,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:10,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:54:11,007 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:54:11,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 21:54:13,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:54:13,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:54:13,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 21:54:13,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:54:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-11-22 21:54:13,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:54:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-11-22 21:54:13,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416829885] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:54:13,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:54:13,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 15 [2023-11-22 21:54:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024053195] [2023-11-22 21:54:13,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:54:13,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 21:54:13,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:54:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 21:54:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:54:13,885 INFO L87 Difference]: Start difference. First operand 21194 states and 30465 transitions. Second operand has 15 states, 15 states have (on average 10.6) internal successors, (159), 14 states have internal predecessors, (159), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-22 21:54:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:54:18,814 INFO L93 Difference]: Finished difference Result 42389 states and 60941 transitions. [2023-11-22 21:54:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 21:54:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.6) internal successors, (159), 14 states have internal predecessors, (159), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 357 [2023-11-22 21:54:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:54:18,842 INFO L225 Difference]: With dead ends: 42389 [2023-11-22 21:54:18,843 INFO L226 Difference]: Without dead ends: 21201 [2023-11-22 21:54:18,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-11-22 21:54:18,864 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 1 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-22 21:54:18,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1470 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-22 21:54:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21201 states. [2023-11-22 21:54:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21201 to 21201. [2023-11-22 21:54:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21201 states, 21167 states have (on average 1.4371427221618558) internal successors, (30420), 21171 states have internal predecessors, (30420), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:54:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21201 states to 21201 states and 30472 transitions. [2023-11-22 21:54:19,163 INFO L78 Accepts]: Start accepts. Automaton has 21201 states and 30472 transitions. Word has length 357 [2023-11-22 21:54:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:54:19,163 INFO L495 AbstractCegarLoop]: Abstraction has 21201 states and 30472 transitions. [2023-11-22 21:54:19,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.6) internal successors, (159), 14 states have internal predecessors, (159), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-22 21:54:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 21201 states and 30472 transitions. [2023-11-22 21:54:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-22 21:54:19,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:54:19,183 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:54:19,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-22 21:54:19,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-22 21:54:19,397 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:54:19,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:54:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1786159583, now seen corresponding path program 3 times [2023-11-22 21:54:19,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:54:19,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100267422] [2023-11-22 21:54:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:19,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:54:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:19,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:54:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:19,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-22 21:54:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:19,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 21:54:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:19,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 21:54:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:19,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:54:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:19,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-22 21:54:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-11-22 21:54:19,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:54:19,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100267422] [2023-11-22 21:54:19,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100267422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:54:19,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146987917] [2023-11-22 21:54:19,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:54:19,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:19,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:54:19,887 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:54:19,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 21:54:23,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 21:54:23,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:54:23,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 21:54:23,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:54:23,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-22 21:54:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-11-22 21:54:23,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:54:23,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146987917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:54:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:54:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-22 21:54:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295209810] [2023-11-22 21:54:23,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:54:23,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 21:54:23,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:54:23,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 21:54:23,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:54:23,169 INFO L87 Difference]: Start difference. First operand 21201 states and 30472 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:54:24,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:54:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:54:27,220 INFO L93 Difference]: Finished difference Result 60123 states and 85269 transitions. [2023-11-22 21:54:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:54:27,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 367 [2023-11-22 21:54:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:54:27,259 INFO L225 Difference]: With dead ends: 60123 [2023-11-22 21:54:27,260 INFO L226 Difference]: Without dead ends: 39121 [2023-11-22 21:54:27,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-22 21:54:27,281 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 88 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:54:27,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1122 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-22 21:54:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39121 states. [2023-11-22 21:54:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39121 to 22737. [2023-11-22 21:54:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22737 states, 22703 states have (on average 1.4413954102981985) internal successors, (32724), 22707 states have internal predecessors, (32724), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:54:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22737 states to 22737 states and 32776 transitions. [2023-11-22 21:54:27,548 INFO L78 Accepts]: Start accepts. Automaton has 22737 states and 32776 transitions. Word has length 367 [2023-11-22 21:54:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:54:27,549 INFO L495 AbstractCegarLoop]: Abstraction has 22737 states and 32776 transitions. [2023-11-22 21:54:27,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:54:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 22737 states and 32776 transitions. [2023-11-22 21:54:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-22 21:54:27,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:54:27,569 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:54:27,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-22 21:54:27,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-22 21:54:27,783 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:54:27,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:54:27,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1926708193, now seen corresponding path program 1 times [2023-11-22 21:54:27,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:54:27,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460182653] [2023-11-22 21:54:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:27,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:54:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:28,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:54:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:28,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-22 21:54:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:28,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 21:54:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:28,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 21:54:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:28,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:54:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:28,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-22 21:54:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-11-22 21:54:28,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:54:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460182653] [2023-11-22 21:54:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460182653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:54:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888875912] [2023-11-22 21:54:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:28,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:28,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:54:28,380 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:54:28,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-22 21:54:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:29,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:54:29,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:54:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2023-11-22 21:54:29,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:54:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888875912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:54:29,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:54:29,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:54:29,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481767041] [2023-11-22 21:54:29,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:54:29,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:54:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:54:29,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:54:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:54:29,368 INFO L87 Difference]: Start difference. First operand 22737 states and 32776 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:54:30,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:54:31,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:54:32,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:54:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:54:32,765 INFO L93 Difference]: Finished difference Result 46043 states and 66581 transitions. [2023-11-22 21:54:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:54:32,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 367 [2023-11-22 21:54:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:54:32,792 INFO L225 Difference]: With dead ends: 46043 [2023-11-22 21:54:32,793 INFO L226 Difference]: Without dead ends: 23505 [2023-11-22 21:54:32,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:54:32,808 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 8 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:54:32,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 977 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-22 21:54:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23505 states. [2023-11-22 21:54:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23505 to 22737. [2023-11-22 21:54:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22737 states, 22703 states have (on average 1.4301193674844734) internal successors, (32468), 22707 states have internal predecessors, (32468), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:54:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22737 states to 22737 states and 32520 transitions. [2023-11-22 21:54:33,028 INFO L78 Accepts]: Start accepts. Automaton has 22737 states and 32520 transitions. Word has length 367 [2023-11-22 21:54:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:54:33,029 INFO L495 AbstractCegarLoop]: Abstraction has 22737 states and 32520 transitions. [2023-11-22 21:54:33,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:54:33,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22737 states and 32520 transitions. [2023-11-22 21:54:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-22 21:54:33,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:54:33,051 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:54:33,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-22 21:54:33,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:33,264 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:54:33,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:54:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash 121269859, now seen corresponding path program 1 times [2023-11-22 21:54:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:54:33,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634649983] [2023-11-22 21:54:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:54:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:33,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:54:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:33,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-22 21:54:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 21:54:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:33,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 21:54:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:33,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:54:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:33,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-22 21:54:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-11-22 21:54:33,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:54:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634649983] [2023-11-22 21:54:33,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634649983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:54:33,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852360956] [2023-11-22 21:54:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:33,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:54:33,773 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:54:33,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-22 21:54:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:34,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 1734 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:54:34,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:54:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2023-11-22 21:54:34,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:54:34,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852360956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:54:34,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:54:34,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-22 21:54:34,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231888569] [2023-11-22 21:54:34,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:54:34,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:54:34,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:54:34,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:54:34,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:54:34,877 INFO L87 Difference]: Start difference. First operand 22737 states and 32520 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:54:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:54:37,474 INFO L93 Difference]: Finished difference Result 46299 states and 66581 transitions. [2023-11-22 21:54:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:54:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 367 [2023-11-22 21:54:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:54:37,500 INFO L225 Difference]: With dead ends: 46299 [2023-11-22 21:54:37,501 INFO L226 Difference]: Without dead ends: 23761 [2023-11-22 21:54:37,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-22 21:54:37,519 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 2 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-22 21:54:37,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 968 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-22 21:54:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23761 states. [2023-11-22 21:54:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23761 to 23505. [2023-11-22 21:54:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23505 states, 23471 states have (on average 1.3942311789016233) internal successors, (32724), 23475 states have internal predecessors, (32724), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-22 21:54:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23505 states to 23505 states and 32776 transitions. [2023-11-22 21:54:37,730 INFO L78 Accepts]: Start accepts. Automaton has 23505 states and 32776 transitions. Word has length 367 [2023-11-22 21:54:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:54:37,731 INFO L495 AbstractCegarLoop]: Abstraction has 23505 states and 32776 transitions. [2023-11-22 21:54:37,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:54:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 23505 states and 32776 transitions. [2023-11-22 21:54:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-22 21:54:37,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:54:37,752 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:54:37,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-22 21:54:37,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:37,987 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:54:37,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:54:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash 543971685, now seen corresponding path program 1 times [2023-11-22 21:54:37,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:54:37,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970642443] [2023-11-22 21:54:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:37,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:54:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:38,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:54:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:38,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-22 21:54:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:38,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 21:54:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:38,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 21:54:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:38,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-22 21:54:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:38,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-22 21:54:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-11-22 21:54:38,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:54:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970642443] [2023-11-22 21:54:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970642443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:54:38,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418299417] [2023-11-22 21:54:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:38,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:38,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:54:38,501 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:54:38,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-22 21:54:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:39,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 21:54:39,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:54:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked. [2023-11-22 21:54:39,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:54:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked. [2023-11-22 21:54:39,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418299417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:54:39,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:54:39,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 19 [2023-11-22 21:54:39,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200184934] [2023-11-22 21:54:39,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:54:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:54:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:54:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:54:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:54:39,794 INFO L87 Difference]: Start difference. First operand 23505 states and 32776 transitions. Second operand has 19 states, 19 states have (on average 8.947368421052632) internal successors, (170), 18 states have internal predecessors, (170), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-22 21:54:41,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:54:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:54:47,931 INFO L93 Difference]: Finished difference Result 47015 states and 65565 transitions. [2023-11-22 21:54:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 21:54:47,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.947368421052632) internal successors, (170), 18 states have internal predecessors, (170), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 367 [2023-11-22 21:54:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:54:47,950 INFO L225 Difference]: With dead ends: 47015 [2023-11-22 21:54:47,951 INFO L226 Difference]: Without dead ends: 23522 [2023-11-22 21:54:47,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 723 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:54:47,968 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 11 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:54:47,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2725 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-11-22 21:54:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23522 states. [2023-11-22 21:54:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23522 to 23516. [2023-11-22 21:54:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23516 states, 23481 states have (on average 1.3941058728333546) internal successors, (32735), 23485 states have internal predecessors, (32735), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-22 21:54:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23516 states to 23516 states and 32789 transitions. [2023-11-22 21:54:48,279 INFO L78 Accepts]: Start accepts. Automaton has 23516 states and 32789 transitions. Word has length 367 [2023-11-22 21:54:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:54:48,279 INFO L495 AbstractCegarLoop]: Abstraction has 23516 states and 32789 transitions. [2023-11-22 21:54:48,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.947368421052632) internal successors, (170), 18 states have internal predecessors, (170), 2 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-22 21:54:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 23516 states and 32789 transitions. [2023-11-22 21:54:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-11-22 21:54:48,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:54:48,301 INFO L195 NwaCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:54:48,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-22 21:54:48,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:48,502 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:54:48,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:54:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1514670133, now seen corresponding path program 2 times [2023-11-22 21:54:48,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:54:48,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659521702] [2023-11-22 21:54:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:48,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:54:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:48,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:54:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:48,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:54:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:48,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:54:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:48,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:54:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:48,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:54:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:48,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-22 21:54:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2023-11-22 21:54:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:54:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659521702] [2023-11-22 21:54:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659521702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:54:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936987568] [2023-11-22 21:54:49,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:54:49,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:49,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:54:49,031 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:54:49,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-22 21:54:53,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:54:53,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:54:53,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 21:54:53,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:54:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2023-11-22 21:54:53,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:54:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2023-11-22 21:54:53,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936987568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:54:53,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:54:53,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-22 21:54:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645100233] [2023-11-22 21:54:53,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:54:53,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 21:54:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:54:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 21:54:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:54:53,439 INFO L87 Difference]: Start difference. First operand 23516 states and 32789 transitions. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-22 21:54:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:54:58,283 INFO L93 Difference]: Finished difference Result 47028 states and 65580 transitions. [2023-11-22 21:54:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 21:54:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 374 [2023-11-22 21:54:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:54:58,303 INFO L225 Difference]: With dead ends: 47028 [2023-11-22 21:54:58,304 INFO L226 Difference]: Without dead ends: 23557 [2023-11-22 21:54:58,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:54:58,319 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 73 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:54:58,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1731 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-22 21:54:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23557 states. [2023-11-22 21:54:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23557 to 23551. [2023-11-22 21:54:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23551 states, 23511 states have (on average 1.3938156607545404) internal successors, (32770), 23515 states have internal predecessors, (32770), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-22 21:54:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23551 states to 23551 states and 32834 transitions. [2023-11-22 21:54:58,520 INFO L78 Accepts]: Start accepts. Automaton has 23551 states and 32834 transitions. Word has length 374 [2023-11-22 21:54:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:54:58,520 INFO L495 AbstractCegarLoop]: Abstraction has 23551 states and 32834 transitions. [2023-11-22 21:54:58,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 10 states have internal predecessors, (163), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-22 21:54:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 23551 states and 32834 transitions. [2023-11-22 21:54:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-11-22 21:54:58,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:54:58,539 INFO L195 NwaCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:54:58,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-22 21:54:58,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-22 21:54:58,747 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:54:58,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:54:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1843475819, now seen corresponding path program 3 times [2023-11-22 21:54:58,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:54:58,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182480344] [2023-11-22 21:54:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:54:58,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:54:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:59,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:54:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:59,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:54:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:59,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:54:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:59,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:54:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:59,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:54:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:59,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-22 21:54:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:54:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2023-11-22 21:54:59,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:54:59,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182480344] [2023-11-22 21:54:59,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182480344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:54:59,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822619308] [2023-11-22 21:54:59,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:54:59,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:54:59,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:54:59,210 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:54:59,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-22 21:55:02,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 21:55:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:55:02,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 21:55:02,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:55:02,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 382 treesize of output 226 [2023-11-22 21:55:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2023-11-22 21:55:03,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:55:03,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822619308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:55:03,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:55:03,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2023-11-22 21:55:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824181293] [2023-11-22 21:55:03,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:55:03,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 21:55:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:03,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 21:55:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-22 21:55:03,867 INFO L87 Difference]: Start difference. First operand 23551 states and 32834 transitions. Second operand has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:55:06,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:55:07,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:55:10,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:55:11,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:55:12,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:55:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:55:13,057 INFO L93 Difference]: Finished difference Result 47005 states and 65563 transitions. [2023-11-22 21:55:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:55:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 389 [2023-11-22 21:55:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:55:13,081 INFO L225 Difference]: With dead ends: 47005 [2023-11-22 21:55:13,082 INFO L226 Difference]: Without dead ends: 23686 [2023-11-22 21:55:13,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-22 21:55:13,101 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 221 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:55:13,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1362 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2023-11-22 21:55:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23686 states. [2023-11-22 21:55:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23686 to 23563. [2023-11-22 21:55:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23563 states, 23523 states have (on average 1.39395485269736) internal successors, (32790), 23527 states have internal predecessors, (32790), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-22 21:55:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23563 states to 23563 states and 32854 transitions. [2023-11-22 21:55:13,337 INFO L78 Accepts]: Start accepts. Automaton has 23563 states and 32854 transitions. Word has length 389 [2023-11-22 21:55:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:55:13,338 INFO L495 AbstractCegarLoop]: Abstraction has 23563 states and 32854 transitions. [2023-11-22 21:55:13,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:55:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 23563 states and 32854 transitions. [2023-11-22 21:55:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2023-11-22 21:55:13,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:55:13,359 INFO L195 NwaCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:55:13,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-22 21:55:13,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:13,572 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:55:13,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:55:13,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1836334227, now seen corresponding path program 1 times [2023-11-22 21:55:13,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:55:13,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996794204] [2023-11-22 21:55:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:13,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:55:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:13,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:55:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:13,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:55:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:55:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:13,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:55:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:13,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:55:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:14,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-22 21:55:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:14,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-22 21:55:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2023-11-22 21:55:14,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:55:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996794204] [2023-11-22 21:55:14,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996794204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:55:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498212584] [2023-11-22 21:55:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:14,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:14,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:55:14,125 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:55:14,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-22 21:55:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:15,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 21:55:15,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:55:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2023-11-22 21:55:15,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:55:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2023-11-22 21:55:15,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498212584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:55:15,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:55:15,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-11-22 21:55:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61168082] [2023-11-22 21:55:15,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:55:15,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:55:15,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:55:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:55:15,442 INFO L87 Difference]: Start difference. First operand 23563 states and 32854 transitions. Second operand has 19 states, 19 states have (on average 10.526315789473685) internal successors, (200), 18 states have internal predecessors, (200), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-22 21:55:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:55:21,075 INFO L93 Difference]: Finished difference Result 47122 states and 65714 transitions. [2023-11-22 21:55:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-22 21:55:21,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 10.526315789473685) internal successors, (200), 18 states have internal predecessors, (200), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 398 [2023-11-22 21:55:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:55:21,096 INFO L225 Difference]: With dead ends: 47122 [2023-11-22 21:55:21,096 INFO L226 Difference]: Without dead ends: 23632 [2023-11-22 21:55:21,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:55:21,115 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 102 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 2094 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-22 21:55:21,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 2094 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-22 21:55:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23632 states. [2023-11-22 21:55:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23632 to 23626. [2023-11-22 21:55:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23626 states, 23577 states have (on average 1.393434279170378) internal successors, (32853), 23581 states have internal predecessors, (32853), 41 states have call successors, (41), 7 states have call predecessors, (41), 7 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-22 21:55:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23626 states to 23626 states and 32935 transitions. [2023-11-22 21:55:21,441 INFO L78 Accepts]: Start accepts. Automaton has 23626 states and 32935 transitions. Word has length 398 [2023-11-22 21:55:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:55:21,442 INFO L495 AbstractCegarLoop]: Abstraction has 23626 states and 32935 transitions. [2023-11-22 21:55:21,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.526315789473685) internal successors, (200), 18 states have internal predecessors, (200), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-22 21:55:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 23626 states and 32935 transitions. [2023-11-22 21:55:21,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-11-22 21:55:21,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:55:21,461 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:55:21,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-22 21:55:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-22 21:55:21,668 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:55:21,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:55:21,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1948421235, now seen corresponding path program 2 times [2023-11-22 21:55:21,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:55:21,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435357687] [2023-11-22 21:55:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:55:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:21,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:55:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:22,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:55:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:22,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:55:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:22,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:55:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:22,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:55:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:22,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-22 21:55:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:22,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-11-22 21:55:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2023-11-22 21:55:22,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:55:22,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435357687] [2023-11-22 21:55:22,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435357687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:55:22,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064823957] [2023-11-22 21:55:22,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:55:22,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:22,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:55:22,147 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:55:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-22 21:55:24,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:55:24,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:55:24,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 21:55:24,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:55:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2023-11-22 21:55:24,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:55:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2023-11-22 21:55:25,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064823957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:55:25,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:55:25,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-22 21:55:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449723478] [2023-11-22 21:55:25,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:55:25,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 21:55:25,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:25,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 21:55:25,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:55:25,118 INFO L87 Difference]: Start difference. First operand 23626 states and 32935 transitions. Second operand has 11 states, 11 states have (on average 16.0) internal successors, (176), 10 states have internal predecessors, (176), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-22 21:55:27,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:55:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:55:30,201 INFO L93 Difference]: Finished difference Result 47148 states and 65743 transitions. [2023-11-22 21:55:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 21:55:30,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 16.0) internal successors, (176), 10 states have internal predecessors, (176), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 425 [2023-11-22 21:55:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:55:30,223 INFO L225 Difference]: With dead ends: 47148 [2023-11-22 21:55:30,223 INFO L226 Difference]: Without dead ends: 23667 [2023-11-22 21:55:30,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:55:30,242 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 52 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:55:30,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1442 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-22 21:55:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2023-11-22 21:55:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 23661. [2023-11-22 21:55:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23661 states, 23607 states have (on average 1.3931461007328334) internal successors, (32888), 23611 states have internal predecessors, (32888), 46 states have call successors, (46), 7 states have call predecessors, (46), 7 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-22 21:55:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23661 states to 23661 states and 32980 transitions. [2023-11-22 21:55:30,458 INFO L78 Accepts]: Start accepts. Automaton has 23661 states and 32980 transitions. Word has length 425 [2023-11-22 21:55:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:55:30,459 INFO L495 AbstractCegarLoop]: Abstraction has 23661 states and 32980 transitions. [2023-11-22 21:55:30,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.0) internal successors, (176), 10 states have internal predecessors, (176), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-22 21:55:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 23661 states and 32980 transitions. [2023-11-22 21:55:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-22 21:55:30,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:55:30,479 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:55:30,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-22 21:55:30,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:30,681 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:55:30,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:55:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash -640092893, now seen corresponding path program 3 times [2023-11-22 21:55:30,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:55:30,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960480365] [2023-11-22 21:55:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:30,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:55:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:31,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:55:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:31,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:55:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:31,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:55:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:31,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:55:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:31,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:55:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:31,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-22 21:55:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:31,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-11-22 21:55:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2023-11-22 21:55:31,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:55:31,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960480365] [2023-11-22 21:55:31,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960480365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:55:31,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:55:31,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 21:55:31,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555498325] [2023-11-22 21:55:31,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:55:31,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 21:55:31,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:31,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 21:55:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:55:31,470 INFO L87 Difference]: Start difference. First operand 23661 states and 32980 transitions. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:55:35,135 INFO L93 Difference]: Finished difference Result 67447 states and 94177 transitions. [2023-11-22 21:55:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 21:55:35,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 440 [2023-11-22 21:55:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:55:35,176 INFO L225 Difference]: With dead ends: 67447 [2023-11-22 21:55:35,176 INFO L226 Difference]: Without dead ends: 44141 [2023-11-22 21:55:35,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:55:35,200 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 180 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-22 21:55:35,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 997 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-22 21:55:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44141 states. [2023-11-22 21:55:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44141 to 25709. [2023-11-22 21:55:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25709 states, 25655 states have (on average 1.4016760865328397) internal successors, (35960), 25659 states have internal predecessors, (35960), 46 states have call successors, (46), 7 states have call predecessors, (46), 7 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-22 21:55:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25709 states to 25709 states and 36052 transitions. [2023-11-22 21:55:35,513 INFO L78 Accepts]: Start accepts. Automaton has 25709 states and 36052 transitions. Word has length 440 [2023-11-22 21:55:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:55:35,513 INFO L495 AbstractCegarLoop]: Abstraction has 25709 states and 36052 transitions. [2023-11-22 21:55:35,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 25709 states and 36052 transitions. [2023-11-22 21:55:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-22 21:55:35,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:55:35,540 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:55:35,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-22 21:55:35,540 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:55:35,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:55:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1541426371, now seen corresponding path program 1 times [2023-11-22 21:55:35,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:55:35,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216400158] [2023-11-22 21:55:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:55:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:36,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:55:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:55:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:36,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:55:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:36,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:55:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:55:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:36,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-22 21:55:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:36,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-11-22 21:55:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 1043 trivial. 0 not checked. [2023-11-22 21:55:36,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:55:36,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216400158] [2023-11-22 21:55:36,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216400158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:55:36,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:55:36,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 21:55:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736488512] [2023-11-22 21:55:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:55:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 21:55:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 21:55:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:55:36,245 INFO L87 Difference]: Start difference. First operand 25709 states and 36052 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:38,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:55:40,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:55:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:55:40,560 INFO L93 Difference]: Finished difference Result 68983 states and 96481 transitions. [2023-11-22 21:55:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:55:40,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 440 [2023-11-22 21:55:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:55:40,600 INFO L225 Difference]: With dead ends: 68983 [2023-11-22 21:55:40,600 INFO L226 Difference]: Without dead ends: 43629 [2023-11-22 21:55:40,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:55:40,623 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 157 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:55:40,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1000 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-22 21:55:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43629 states. [2023-11-22 21:55:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43629 to 27245. [2023-11-22 21:55:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27245 states, 27191 states have (on average 1.3789856937957412) internal successors, (37496), 27195 states have internal predecessors, (37496), 46 states have call successors, (46), 7 states have call predecessors, (46), 7 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-22 21:55:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27245 states to 27245 states and 37588 transitions. [2023-11-22 21:55:40,932 INFO L78 Accepts]: Start accepts. Automaton has 27245 states and 37588 transitions. Word has length 440 [2023-11-22 21:55:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:55:40,932 INFO L495 AbstractCegarLoop]: Abstraction has 27245 states and 37588 transitions. [2023-11-22 21:55:40,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 27245 states and 37588 transitions. [2023-11-22 21:55:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-22 21:55:40,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:55:40,960 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:55:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-11-22 21:55:40,960 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:55:40,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:55:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash 889728283, now seen corresponding path program 1 times [2023-11-22 21:55:40,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:55:40,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903640343] [2023-11-22 21:55:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:55:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:41,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:55:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:41,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:55:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:55:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:55:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:41,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:55:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:41,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-22 21:55:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-11-22 21:55:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 354 proven. 8 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2023-11-22 21:55:41,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:55:41,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903640343] [2023-11-22 21:55:41,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903640343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:55:41,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468797462] [2023-11-22 21:55:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:41,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:41,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:55:41,869 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:55:41,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-22 21:55:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:43,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:55:43,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:55:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2023-11-22 21:55:43,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:55:43,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468797462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:55:43,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:55:43,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-22 21:55:43,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189036899] [2023-11-22 21:55:43,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:55:43,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:55:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:55:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-22 21:55:43,134 INFO L87 Difference]: Start difference. First operand 27245 states and 37588 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:55:46,027 INFO L93 Difference]: Finished difference Result 55415 states and 76769 transitions. [2023-11-22 21:55:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:55:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 440 [2023-11-22 21:55:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:55:46,057 INFO L225 Difference]: With dead ends: 55415 [2023-11-22 21:55:46,057 INFO L226 Difference]: Without dead ends: 28525 [2023-11-22 21:55:46,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:55:46,077 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 14 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:55:46,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 986 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-22 21:55:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28525 states. [2023-11-22 21:55:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28525 to 27245. [2023-11-22 21:55:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27245 states, 27191 states have (on average 1.3695708138722371) internal successors, (37240), 27195 states have internal predecessors, (37240), 46 states have call successors, (46), 7 states have call predecessors, (46), 7 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-22 21:55:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27245 states to 27245 states and 37332 transitions. [2023-11-22 21:55:46,337 INFO L78 Accepts]: Start accepts. Automaton has 27245 states and 37332 transitions. Word has length 440 [2023-11-22 21:55:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:55:46,338 INFO L495 AbstractCegarLoop]: Abstraction has 27245 states and 37332 transitions. [2023-11-22 21:55:46,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 27245 states and 37332 transitions. [2023-11-22 21:55:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-22 21:55:46,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:55:46,364 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:55:46,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-22 21:55:46,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-22 21:55:46,565 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:55:46,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:55:46,565 INFO L85 PathProgramCache]: Analyzing trace with hash -915710051, now seen corresponding path program 1 times [2023-11-22 21:55:46,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:55:46,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368464960] [2023-11-22 21:55:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:46,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:55:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:47,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:55:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:47,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:55:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:47,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:55:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:47,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:55:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:47,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:55:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:47,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-22 21:55:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:47,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-11-22 21:55:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 354 proven. 8 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2023-11-22 21:55:47,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:55:47,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368464960] [2023-11-22 21:55:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368464960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:55:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185175589] [2023-11-22 21:55:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:47,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:55:47,487 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:55:47,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-22 21:55:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:48,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1962 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:55:48,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:55:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2023-11-22 21:55:48,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:55:48,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185175589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:55:48,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:55:48,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-22 21:55:48,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710777655] [2023-11-22 21:55:48,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:55:48,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:55:48,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:55:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-22 21:55:48,728 INFO L87 Difference]: Start difference. First operand 27245 states and 37332 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:55:51,089 INFO L93 Difference]: Finished difference Result 56183 states and 77537 transitions. [2023-11-22 21:55:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:55:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 440 [2023-11-22 21:55:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:55:51,118 INFO L225 Difference]: With dead ends: 56183 [2023-11-22 21:55:51,119 INFO L226 Difference]: Without dead ends: 29293 [2023-11-22 21:55:51,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:55:51,140 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 8 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:55:51,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 977 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-22 21:55:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29293 states. [2023-11-22 21:55:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29293 to 27757. [2023-11-22 21:55:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27757 states, 27703 states have (on average 1.3534996209796772) internal successors, (37496), 27707 states have internal predecessors, (37496), 46 states have call successors, (46), 7 states have call predecessors, (46), 7 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-22 21:55:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27757 states to 27757 states and 37588 transitions. [2023-11-22 21:55:51,407 INFO L78 Accepts]: Start accepts. Automaton has 27757 states and 37588 transitions. Word has length 440 [2023-11-22 21:55:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:55:51,407 INFO L495 AbstractCegarLoop]: Abstraction has 27757 states and 37588 transitions. [2023-11-22 21:55:51,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 27757 states and 37588 transitions. [2023-11-22 21:55:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-22 21:55:51,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:55:51,434 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:55:51,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-22 21:55:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-22 21:55:51,635 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:55:51,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:55:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash -493008225, now seen corresponding path program 1 times [2023-11-22 21:55:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:55:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880233838] [2023-11-22 21:55:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:51,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:55:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:52,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:55:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:52,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:55:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:52,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:55:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:52,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:55:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:52,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:55:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:52,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-22 21:55:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:52,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-11-22 21:55:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 354 proven. 8 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2023-11-22 21:55:52,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:55:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880233838] [2023-11-22 21:55:52,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880233838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:55:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723268864] [2023-11-22 21:55:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:52,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:52,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:55:52,500 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:55:52,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-22 21:55:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:53,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1959 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:55:53,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:55:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 1137 trivial. 0 not checked. [2023-11-22 21:55:53,812 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:55:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723268864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:55:53,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:55:53,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-22 21:55:53,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832996667] [2023-11-22 21:55:53,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:55:53,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 21:55:53,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:53,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 21:55:53,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-22 21:55:53,813 INFO L87 Difference]: Start difference. First operand 27757 states and 37588 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:55:56,620 INFO L93 Difference]: Finished difference Result 56183 states and 76513 transitions. [2023-11-22 21:55:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 21:55:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 440 [2023-11-22 21:55:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:55:56,651 INFO L225 Difference]: With dead ends: 56183 [2023-11-22 21:55:56,652 INFO L226 Difference]: Without dead ends: 28781 [2023-11-22 21:55:56,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:55:56,674 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 2 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:55:56,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 968 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-22 21:55:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28781 states. [2023-11-22 21:55:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28781 to 28525. [2023-11-22 21:55:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28525 states, 28471 states have (on average 1.3259808225914087) internal successors, (37752), 28475 states have internal predecessors, (37752), 46 states have call successors, (46), 7 states have call predecessors, (46), 7 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-22 21:55:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28525 states to 28525 states and 37844 transitions. [2023-11-22 21:55:56,952 INFO L78 Accepts]: Start accepts. Automaton has 28525 states and 37844 transitions. Word has length 440 [2023-11-22 21:55:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:55:56,952 INFO L495 AbstractCegarLoop]: Abstraction has 28525 states and 37844 transitions. [2023-11-22 21:55:56,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:55:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 28525 states and 37844 transitions. [2023-11-22 21:55:56,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-22 21:55:56,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:55:56,979 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:55:56,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-22 21:55:57,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:57,180 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:55:57,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:55:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2113015329, now seen corresponding path program 1 times [2023-11-22 21:55:57,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:55:57,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277012557] [2023-11-22 21:55:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:57,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:55:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:57,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:55:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:57,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:55:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:57,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:55:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:57,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:55:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:57,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:55:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:57,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-22 21:55:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:58,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-11-22 21:55:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 354 proven. 8 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2023-11-22 21:55:58,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:55:58,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277012557] [2023-11-22 21:55:58,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277012557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:55:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247520098] [2023-11-22 21:55:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:55:58,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:55:58,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:55:58,057 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:55:58,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-22 21:55:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:55:59,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 21:55:59,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:55:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2023-11-22 21:55:59,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:55:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2023-11-22 21:55:59,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247520098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:55:59,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:55:59,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2023-11-22 21:55:59,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98001330] [2023-11-22 21:55:59,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:55:59,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 21:55:59,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:55:59,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 21:55:59,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2023-11-22 21:55:59,544 INFO L87 Difference]: Start difference. First operand 28525 states and 37844 transitions. Second operand has 22 states, 22 states have (on average 13.318181818181818) internal successors, (293), 21 states have internal predecessors, (293), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-22 21:56:04,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:56:05,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:56:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:56:06,545 INFO L93 Difference]: Finished difference Result 75365 states and 101403 transitions. [2023-11-22 21:56:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 21:56:06,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 13.318181818181818) internal successors, (293), 21 states have internal predecessors, (293), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 440 [2023-11-22 21:56:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:56:06,583 INFO L225 Difference]: With dead ends: 75365 [2023-11-22 21:56:06,583 INFO L226 Difference]: Without dead ends: 47013 [2023-11-22 21:56:06,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2023-11-22 21:56:06,596 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 205 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-22 21:56:06,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1889 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-22 21:56:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47013 states. [2023-11-22 21:56:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47013 to 38053. [2023-11-22 21:56:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38053 states, 37991 states have (on average 1.3321049722302651) internal successors, (50608), 37995 states have internal predecessors, (50608), 54 states have call successors, (54), 7 states have call predecessors, (54), 7 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-22 21:56:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38053 states to 38053 states and 50716 transitions. [2023-11-22 21:56:06,962 INFO L78 Accepts]: Start accepts. Automaton has 38053 states and 50716 transitions. Word has length 440 [2023-11-22 21:56:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:56:06,963 INFO L495 AbstractCegarLoop]: Abstraction has 38053 states and 50716 transitions. [2023-11-22 21:56:06,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.318181818181818) internal successors, (293), 21 states have internal predecessors, (293), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-22 21:56:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 38053 states and 50716 transitions. [2023-11-22 21:56:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-22 21:56:06,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:56:06,997 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:56:07,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-22 21:56:07,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-22 21:56:07,198 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:56:07,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:56:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2035441241, now seen corresponding path program 1 times [2023-11-22 21:56:07,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:56:07,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796504081] [2023-11-22 21:56:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:56:07,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:56:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:07,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:56:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:07,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:56:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:07,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:56:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:07,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:56:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:07,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:56:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:07,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-22 21:56:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:07,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2023-11-22 21:56:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2023-11-22 21:56:07,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:56:07,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796504081] [2023-11-22 21:56:07,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796504081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:56:07,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:56:07,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 21:56:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053461474] [2023-11-22 21:56:07,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:56:07,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 21:56:07,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:56:07,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 21:56:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:56:07,827 INFO L87 Difference]: Start difference. First operand 38053 states and 50716 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:56:09,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:56:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:56:12,218 INFO L93 Difference]: Finished difference Result 77231 states and 102697 transitions. [2023-11-22 21:56:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:56:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 464 [2023-11-22 21:56:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:56:12,256 INFO L225 Difference]: With dead ends: 77231 [2023-11-22 21:56:12,257 INFO L226 Difference]: Without dead ends: 39589 [2023-11-22 21:56:12,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:56:12,285 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 10 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:56:12,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1127 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-22 21:56:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39589 states. [2023-11-22 21:56:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39589 to 38565. [2023-11-22 21:56:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38565 states, 38503 states have (on average 1.327688751525855) internal successors, (51120), 38507 states have internal predecessors, (51120), 54 states have call successors, (54), 7 states have call predecessors, (54), 7 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-22 21:56:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38565 states to 38565 states and 51228 transitions. [2023-11-22 21:56:12,643 INFO L78 Accepts]: Start accepts. Automaton has 38565 states and 51228 transitions. Word has length 464 [2023-11-22 21:56:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:56:12,643 INFO L495 AbstractCegarLoop]: Abstraction has 38565 states and 51228 transitions. [2023-11-22 21:56:12,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:56:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 38565 states and 51228 transitions. [2023-11-22 21:56:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-22 21:56:12,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:56:12,678 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:56:12,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-11-22 21:56:12,678 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:56:12,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:56:12,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1009797679, now seen corresponding path program 1 times [2023-11-22 21:56:12,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:56:12,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264114540] [2023-11-22 21:56:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:56:12,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:56:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:13,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:56:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:56:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:13,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:56:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:13,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:56:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:13,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:56:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:13,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-22 21:56:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:13,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2023-11-22 21:56:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 372 proven. 8 refuted. 0 times theorem prover too weak. 1065 trivial. 0 not checked. [2023-11-22 21:56:13,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:56:13,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264114540] [2023-11-22 21:56:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264114540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:56:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808562541] [2023-11-22 21:56:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:56:13,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:56:13,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:56:13,625 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:56:13,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-22 21:56:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:14,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 1967 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 21:56:14,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:56:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1438 trivial. 0 not checked. [2023-11-22 21:56:14,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:56:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2023-11-22 21:56:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808562541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:56:15,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:56:15,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2023-11-22 21:56:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716725266] [2023-11-22 21:56:15,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:56:15,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 21:56:15,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:56:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 21:56:15,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-22 21:56:15,019 INFO L87 Difference]: Start difference. First operand 38565 states and 51228 transitions. Second operand has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 13 states have internal predecessors, (283), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-22 21:56:17,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:56:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:56:21,173 INFO L93 Difference]: Finished difference Result 84593 states and 112934 transitions. [2023-11-22 21:56:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 21:56:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 13 states have internal predecessors, (283), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 464 [2023-11-22 21:56:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:56:21,220 INFO L225 Difference]: With dead ends: 84593 [2023-11-22 21:56:21,220 INFO L226 Difference]: Without dead ends: 46273 [2023-11-22 21:56:21,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 937 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:56:21,242 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 206 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-22 21:56:21,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1560 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-22 21:56:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46273 states. [2023-11-22 21:56:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46273 to 42945. [2023-11-22 21:56:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42945 states, 42879 states have (on average 1.3241913290888314) internal successors, (56780), 42883 states have internal predecessors, (56780), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-22 21:56:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42945 states to 42945 states and 56896 transitions. [2023-11-22 21:56:21,714 INFO L78 Accepts]: Start accepts. Automaton has 42945 states and 56896 transitions. Word has length 464 [2023-11-22 21:56:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:56:21,715 INFO L495 AbstractCegarLoop]: Abstraction has 42945 states and 56896 transitions. [2023-11-22 21:56:21,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 13 states have internal predecessors, (283), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-22 21:56:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 42945 states and 56896 transitions. [2023-11-22 21:56:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-22 21:56:21,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:56:21,751 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:56:21,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-22 21:56:21,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:56:21,952 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:56:21,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:56:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1578902705, now seen corresponding path program 1 times [2023-11-22 21:56:21,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:56:21,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099318805] [2023-11-22 21:56:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:56:21,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:56:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:22,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:56:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:22,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:56:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:22,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:56:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:22,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:56:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:22,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:56:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:22,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2023-11-22 21:56:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:22,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-11-22 21:56:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2023-11-22 21:56:22,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:56:22,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099318805] [2023-11-22 21:56:22,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099318805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:56:22,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:56:22,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 21:56:22,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143536725] [2023-11-22 21:56:22,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:56:22,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 21:56:22,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:56:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 21:56:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:56:22,486 INFO L87 Difference]: Start difference. First operand 42945 states and 56896 transitions. Second operand has 5 states, 5 states have (on average 39.8) internal successors, (199), 4 states have internal predecessors, (199), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:56:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:56:26,899 INFO L93 Difference]: Finished difference Result 88011 states and 117069 transitions. [2023-11-22 21:56:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:56:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 4 states have internal predecessors, (199), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 476 [2023-11-22 21:56:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:56:26,957 INFO L225 Difference]: With dead ends: 88011 [2023-11-22 21:56:26,957 INFO L226 Difference]: Without dead ends: 45505 [2023-11-22 21:56:26,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:56:26,987 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 13 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:56:26,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1130 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-22 21:56:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45505 states. [2023-11-22 21:56:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45505 to 43457. [2023-11-22 21:56:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43457 states, 43391 states have (on average 1.3203659745108434) internal successors, (57292), 43395 states have internal predecessors, (57292), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-22 21:56:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43457 states to 43457 states and 57408 transitions. [2023-11-22 21:56:27,512 INFO L78 Accepts]: Start accepts. Automaton has 43457 states and 57408 transitions. Word has length 476 [2023-11-22 21:56:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:56:27,516 INFO L495 AbstractCegarLoop]: Abstraction has 43457 states and 57408 transitions. [2023-11-22 21:56:27,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 4 states have internal predecessors, (199), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:56:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 43457 states and 57408 transitions. [2023-11-22 21:56:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-22 21:56:27,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:56:27,561 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:56:27,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-11-22 21:56:27,562 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:56:27,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:56:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash -702219213, now seen corresponding path program 1 times [2023-11-22 21:56:27,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:56:27,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665501921] [2023-11-22 21:56:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:56:27,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:56:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:28,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:56:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:56:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:28,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:56:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:28,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:56:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:28,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:56:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2023-11-22 21:56:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:28,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-11-22 21:56:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2023-11-22 21:56:28,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:56:28,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665501921] [2023-11-22 21:56:28,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665501921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:56:28,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:56:28,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 21:56:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498635557] [2023-11-22 21:56:28,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:56:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 21:56:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:56:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 21:56:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:56:28,268 INFO L87 Difference]: Start difference. First operand 43457 states and 57408 transitions. Second operand has 5 states, 5 states have (on average 39.8) internal successors, (199), 4 states have internal predecessors, (199), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:56:29,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:56:30,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:56:32,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:56:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:56:33,347 INFO L93 Difference]: Finished difference Result 87243 states and 115277 transitions. [2023-11-22 21:56:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 21:56:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 4 states have internal predecessors, (199), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 476 [2023-11-22 21:56:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:56:33,391 INFO L225 Difference]: With dead ends: 87243 [2023-11-22 21:56:33,391 INFO L226 Difference]: Without dead ends: 44225 [2023-11-22 21:56:33,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 21:56:33,427 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 4 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-22 21:56:33,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1129 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-22 21:56:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44225 states. [2023-11-22 21:56:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44225 to 43969. [2023-11-22 21:56:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43969 states, 43903 states have (on average 1.3166298430631165) internal successors, (57804), 43907 states have internal predecessors, (57804), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-22 21:56:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43969 states to 43969 states and 57920 transitions. [2023-11-22 21:56:33,842 INFO L78 Accepts]: Start accepts. Automaton has 43969 states and 57920 transitions. Word has length 476 [2023-11-22 21:56:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:56:33,842 INFO L495 AbstractCegarLoop]: Abstraction has 43969 states and 57920 transitions. [2023-11-22 21:56:33,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 4 states have internal predecessors, (199), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-22 21:56:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 43969 states and 57920 transitions. [2023-11-22 21:56:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-22 21:56:33,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:56:33,883 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:56:33,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-11-22 21:56:33,883 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:56:33,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:56:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1715401033, now seen corresponding path program 2 times [2023-11-22 21:56:33,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:56:33,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75535500] [2023-11-22 21:56:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:56:33,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:56:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:56:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:34,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:56:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:56:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-22 21:56:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:34,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-22 21:56:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:34,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2023-11-22 21:56:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:34,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-11-22 21:56:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:56:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 456 proven. 24 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2023-11-22 21:56:34,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:56:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75535500] [2023-11-22 21:56:34,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75535500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:56:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70138416] [2023-11-22 21:56:34,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:56:34,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:56:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:56:34,885 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:56:34,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-22 21:56:38,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:56:38,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:56:38,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 21:56:38,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:56:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 1438 trivial. 0 not checked. [2023-11-22 21:56:38,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:56:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2023-11-22 21:56:38,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70138416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:56:38,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:56:38,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2023-11-22 21:56:38,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888940249] [2023-11-22 21:56:38,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:56:38,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 21:56:38,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:56:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 21:56:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2023-11-22 21:56:38,518 INFO L87 Difference]: Start difference. First operand 43969 states and 57920 transitions. Second operand has 22 states, 22 states have (on average 14.227272727272727) internal successors, (313), 21 states have internal predecessors, (313), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-22 21:56:40,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-22 21:56:41,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15