./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness_negated.i --full-output --preprocessor.use.memory.slicer true --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version abd6749d 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/aws-c-common/aws_priority_queue_clean_up_harness_negated.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 5e40f4d1f2bd6845a041ee87dbd7325d05b27e46ea5765d37d27dfa57358a0d5 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 07:34:47,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 07:34:47,138 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 07:34:47,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 07:34:47,144 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 07:34:47,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 07:34:47,181 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 07:34:47,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 07:34:47,182 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 07:34:47,186 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 07:34:47,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 07:34:47,186 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 07:34:47,187 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 07:34:47,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 07:34:47,189 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 07:34:47,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 07:34:47,189 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 07:34:47,189 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 07:34:47,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 07:34:47,190 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 07:34:47,190 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 07:34:47,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 07:34:47,191 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 07:34:47,191 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 07:34:47,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 07:34:47,192 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 07:34:47,192 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 07:34:47,192 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 07:34:47,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:34:47,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 07:34:47,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 07:34:47,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 07:34:47,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 07:34:47,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 07:34:47,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 07:34:47,195 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 07:34:47,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 07:34:47,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 07:34:47,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 07:34:47,196 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e40f4d1f2bd6845a041ee87dbd7325d05b27e46ea5765d37d27dfa57358a0d5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-23 07:34:47,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 07:34:47,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 07:34:47,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 07:34:47,511 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 07:34:47,511 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 07:34:47,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness_negated.i [2023-11-23 07:34:48,706 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 07:34:49,206 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 07:34:49,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness_negated.i [2023-11-23 07:34:49,248 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e6f68310/2a9a4b4fbe3341158d59bda7cc26ef96/FLAG1c62664a4 [2023-11-23 07:34:49,270 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e6f68310/2a9a4b4fbe3341158d59bda7cc26ef96 [2023-11-23 07:34:49,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 07:34:49,275 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 07:34:49,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 07:34:49,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 07:34:49,284 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 07:34:49,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:34:49" (1/1) ... [2023-11-23 07:34:49,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c56e4a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:49, skipping insertion in model container [2023-11-23 07:34:49,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:34:49" (1/1) ... [2023-11-23 07:34:49,381 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 07:34:49,636 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4501,4514] [2023-11-23 07:34:49,644 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4561,4574] [2023-11-23 07:34:50,527 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,528 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,528 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,529 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,548 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,549 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,550 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,551 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,836 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:34:50,837 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:34:50,838 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:34:50,841 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:34:50,854 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:34:50,856 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:34:50,857 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:34:50,857 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:34:50,859 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:34:50,859 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:34:51,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,007 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:34:51,106 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 07:34:51,125 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4501,4514] [2023-11-23 07:34:51,126 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4561,4574] [2023-11-23 07:34:51,241 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,241 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,241 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,242 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,242 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,264 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,265 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,266 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,266 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,331 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:34:51,332 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:34:51,332 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:34:51,333 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:34:51,333 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:34:51,334 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:34:51,334 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:34:51,334 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:34:51,335 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:34:51,335 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:34:51,380 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,381 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,385 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7671-7682] [2023-11-23 07:34:51,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:34:51,615 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,616 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,616 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,616 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,617 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,617 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,617 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,617 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,618 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,618 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,618 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,618 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,618 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,618 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,619 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,626 INFO L206 MainTranslator]: Completed translation [2023-11-23 07:34:51,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51 WrapperNode [2023-11-23 07:34:51,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 07:34:51,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 07:34:51,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 07:34:51,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 07:34:51,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,723 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,794 INFO L138 Inliner]: procedures = 688, calls = 1498, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 596 [2023-11-23 07:34:51,795 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 07:34:51,795 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 07:34:51,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 07:34:51,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 07:34:51,815 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,828 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,893 INFO L188 MemorySlicer]: Split 284 memory accesses to 6 slices as follows [2, 236, 34, 3, 6, 3]. 83 percent of accesses are in the largest equivalence class. The 247 initializations are split as follows [2, 236, 0, 1, 5, 3]. The 6 writes are split as follows [0, 0, 5, 1, 0, 0]. [2023-11-23 07:34:51,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,931 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,963 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,978 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 07:34:51,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 07:34:51,979 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 07:34:51,979 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 07:34:51,980 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (1/1) ... [2023-11-23 07:34:51,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:34:52,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:52,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 07:34:52,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 07:34:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 07:34:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 07:34:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 07:34:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-23 07:34:52,078 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-23 07:34:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 07:34:52,079 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 07:34:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 07:34:52,080 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 07:34:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 07:34:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 07:34:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 07:34:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 07:34:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 07:34:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 07:34:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 07:34:52,082 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 07:34:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 07:34:52,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 07:34:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 07:34:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 07:34:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 07:34:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 07:34:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 07:34:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 07:34:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 07:34:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-23 07:34:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 07:34:52,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 07:34:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2023-11-23 07:34:52,084 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2023-11-23 07:34:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 07:34:52,084 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 07:34:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 07:34:52,085 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 07:34:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-23 07:34:52,085 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-23 07:34:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-23 07:34:52,085 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-23 07:34:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 07:34:52,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 07:34:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 07:34:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 07:34:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 07:34:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 07:34:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 07:34:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 07:34:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-23 07:34:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 07:34:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 07:34:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 07:34:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-23 07:34:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-23 07:34:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-23 07:34:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 07:34:52,088 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 07:34:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 07:34:52,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 07:34:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 07:34:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 07:34:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 07:34:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 07:34:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 07:34:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 07:34:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-23 07:34:52,090 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-23 07:34:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-23 07:34:52,090 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-23 07:34:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-23 07:34:52,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-23 07:34:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 07:34:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 07:34:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 07:34:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 07:34:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 07:34:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 07:34:52,492 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 07:34:52,500 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 07:34:53,197 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 07:34:53,315 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 07:34:53,316 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 07:34:53,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:34:53 BoogieIcfgContainer [2023-11-23 07:34:53,316 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 07:34:53,318 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 07:34:53,318 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 07:34:53,321 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 07:34:53,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 07:34:49" (1/3) ... [2023-11-23 07:34:53,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c803e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:34:53, skipping insertion in model container [2023-11-23 07:34:53,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51" (2/3) ... [2023-11-23 07:34:53,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c803e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:34:53, skipping insertion in model container [2023-11-23 07:34:53,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:34:53" (3/3) ... [2023-11-23 07:34:53,324 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness_negated.i [2023-11-23 07:34:53,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 07:34:53,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 07:34:53,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 07:34:53,403 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;@f959e77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 07:34:53,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 07:34:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 96 states have internal predecessors, (125), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-23 07:34:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-23 07:34:53,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:53,421 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2023-11-23 07:34:53,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:53,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1978423794, now seen corresponding path program 1 times [2023-11-23 07:34:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:53,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900165621] [2023-11-23 07:34:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:53,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:53,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:34:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:34:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:34:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:34:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:34:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 07:34:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-23 07:34:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-23 07:34:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-23 07:34:54,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:54,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900165621] [2023-11-23 07:34:54,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900165621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:54,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:54,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:34:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94071941] [2023-11-23 07:34:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:54,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:34:54,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:34:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:34:54,500 INFO L87 Difference]: Start difference. First operand has 148 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 96 states have internal predecessors, (125), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 07:34:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:55,374 INFO L93 Difference]: Finished difference Result 329 states and 472 transitions. [2023-11-23 07:34:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 07:34:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 98 [2023-11-23 07:34:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:55,389 INFO L225 Difference]: With dead ends: 329 [2023-11-23 07:34:55,390 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 07:34:55,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:34:55,402 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 163 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:55,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 174 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 07:34:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 07:34:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 146. [2023-11-23 07:34:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 95 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 07:34:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2023-11-23 07:34:55,456 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 98 [2023-11-23 07:34:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:55,457 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2023-11-23 07:34:55,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 07:34:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2023-11-23 07:34:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 07:34:55,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:55,462 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-11-23 07:34:55,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 07:34:55,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:55,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash -651708701, now seen corresponding path program 1 times [2023-11-23 07:34:55,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:55,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116158374] [2023-11-23 07:34:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:55,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:34:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:34:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:34:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:34:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:34:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 07:34:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 07:34:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-23 07:34:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-23 07:34:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 07:34:56,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:56,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116158374] [2023-11-23 07:34:56,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116158374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:34:56,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887214879] [2023-11-23 07:34:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:56,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:56,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:56,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:56,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 07:34:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 07:34:56,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 07:34:56,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:56,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887214879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:56,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:34:56,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-11-23 07:34:56,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657910322] [2023-11-23 07:34:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:56,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 07:34:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 07:34:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:34:56,754 INFO L87 Difference]: Start difference. First operand 146 states and 187 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 07:34:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:56,903 INFO L93 Difference]: Finished difference Result 283 states and 365 transitions. [2023-11-23 07:34:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 07:34:56,904 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, (18), 2 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 113 [2023-11-23 07:34:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:56,906 INFO L225 Difference]: With dead ends: 283 [2023-11-23 07:34:56,906 INFO L226 Difference]: Without dead ends: 147 [2023-11-23 07:34:56,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:34:56,908 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:56,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 340 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:34:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-23 07:34:56,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-23 07:34:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 96 states have internal predecessors, (119), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 07:34:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2023-11-23 07:34:56,929 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 113 [2023-11-23 07:34:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:56,929 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2023-11-23 07:34:56,930 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 07:34:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2023-11-23 07:34:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 07:34:56,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:56,932 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-11-23 07:34:56,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:57,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:57,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:57,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1547524967, now seen corresponding path program 1 times [2023-11-23 07:34:57,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:57,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031011788] [2023-11-23 07:34:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:57,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:34:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:34:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:34:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:34:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:34:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 07:34:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:58,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 07:34:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:58,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:58,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:58,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-23 07:34:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:58,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-23 07:34:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-23 07:34:58,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:58,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031011788] [2023-11-23 07:34:58,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031011788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:58,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:58,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:34:58,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647190059] [2023-11-23 07:34:58,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:34:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:34:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:34:58,099 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 07:34:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:59,500 INFO L93 Difference]: Finished difference Result 319 states and 426 transitions. [2023-11-23 07:34:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 07:34:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 113 [2023-11-23 07:34:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:59,503 INFO L225 Difference]: With dead ends: 319 [2023-11-23 07:34:59,503 INFO L226 Difference]: Without dead ends: 230 [2023-11-23 07:34:59,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:34:59,505 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 252 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:59,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 552 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 07:34:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-23 07:34:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 147. [2023-11-23 07:34:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 96 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 07:34:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2023-11-23 07:34:59,554 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 113 [2023-11-23 07:34:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:59,556 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2023-11-23 07:34:59,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 07:34:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2023-11-23 07:34:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-23 07:34:59,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:59,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-11-23 07:34:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 07:34:59,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:59,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:59,568 INFO L85 PathProgramCache]: Analyzing trace with hash -484438035, now seen corresponding path program 1 times [2023-11-23 07:34:59,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548448415] [2023-11-23 07:34:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:59,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:35:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:35:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:35:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:35:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:35:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:35:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:35:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-23 07:35:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-23 07:35:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-23 07:35:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:35:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 07:35:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:35:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:35:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-23 07:35:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-23 07:35:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-23 07:35:00,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:00,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548448415] [2023-11-23 07:35:00,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548448415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:00,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:00,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 07:35:00,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659495185] [2023-11-23 07:35:00,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:00,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 07:35:00,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:00,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 07:35:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:35:00,542 INFO L87 Difference]: Start difference. First operand 147 states and 187 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 07:35:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:02,841 INFO L93 Difference]: Finished difference Result 380 states and 510 transitions. [2023-11-23 07:35:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 07:35:02,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2023-11-23 07:35:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:02,849 INFO L225 Difference]: With dead ends: 380 [2023-11-23 07:35:02,850 INFO L226 Difference]: Without dead ends: 290 [2023-11-23 07:35:02,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:35:02,853 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 379 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:02,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 775 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 07:35:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-23 07:35:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 151. [2023-11-23 07:35:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 97 states have (on average 1.2474226804123711) internal successors, (121), 99 states have internal predecessors, (121), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (37), 35 states have call predecessors, (37), 34 states have call successors, (37) [2023-11-23 07:35:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2023-11-23 07:35:02,900 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 121 [2023-11-23 07:35:02,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:02,901 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2023-11-23 07:35:02,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 07:35:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2023-11-23 07:35:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-23 07:35:02,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:02,904 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-11-23 07:35:02,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 07:35:02,905 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:02,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash 376635663, now seen corresponding path program 1 times [2023-11-23 07:35:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:02,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415680944] [2023-11-23 07:35:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:02,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:02,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706938442] [2023-11-23 07:35:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:02,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:02,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:02,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:02,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 07:35:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:03,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 07:35:03,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-23 07:35:03,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:03,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:03,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415680944] [2023-11-23 07:35:03,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:03,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706938442] [2023-11-23 07:35:03,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706938442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:03,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:03,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:35:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606556914] [2023-11-23 07:35:03,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:03,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:35:03,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:35:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:35:03,586 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-23 07:35:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:03,932 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2023-11-23 07:35:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:35:03,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 134 [2023-11-23 07:35:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:03,936 INFO L225 Difference]: With dead ends: 243 [2023-11-23 07:35:03,936 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 07:35:03,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 07:35:03,937 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 48 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:03,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 741 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:03,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 07:35:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2023-11-23 07:35:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 96 states have internal predecessors, (117), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 07:35:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 186 transitions. [2023-11-23 07:35:03,963 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 186 transitions. Word has length 134 [2023-11-23 07:35:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:03,965 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 186 transitions. [2023-11-23 07:35:03,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-23 07:35:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 186 transitions. [2023-11-23 07:35:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 07:35:03,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:03,969 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 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] [2023-11-23 07:35:03,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:04,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:04,172 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:04,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash 389663480, now seen corresponding path program 1 times [2023-11-23 07:35:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:04,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290798791] [2023-11-23 07:35:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:35:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:35:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:35:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:35:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:35:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:35:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:04,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:35:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-23 07:35:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-23 07:35:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-23 07:35:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:35:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:35:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 07:35:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:35:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:35:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-23 07:35:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-23 07:35:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-23 07:35:05,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:05,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290798791] [2023-11-23 07:35:05,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290798791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:35:05,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810782928] [2023-11-23 07:35:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:05,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:05,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:05,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:05,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 07:35:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:05,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 07:35:05,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-23 07:35:05,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-23 07:35:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810782928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:06,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:35:06,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 20 [2023-11-23 07:35:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400005130] [2023-11-23 07:35:06,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:06,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 07:35:06,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 07:35:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2023-11-23 07:35:06,268 INFO L87 Difference]: Start difference. First operand 147 states and 186 transitions. Second operand has 20 states, 20 states have (on average 6.15) internal successors, (123), 16 states have internal predecessors, (123), 10 states have call successors, (47), 5 states have call predecessors, (47), 6 states have return successors, (43), 8 states have call predecessors, (43), 10 states have call successors, (43) [2023-11-23 07:35:09,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:09,501 INFO L93 Difference]: Finished difference Result 370 states and 492 transitions. [2023-11-23 07:35:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 07:35:09,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 16 states have internal predecessors, (123), 10 states have call successors, (47), 5 states have call predecessors, (47), 6 states have return successors, (43), 8 states have call predecessors, (43), 10 states have call successors, (43) Word has length 137 [2023-11-23 07:35:09,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:09,503 INFO L225 Difference]: With dead ends: 370 [2023-11-23 07:35:09,504 INFO L226 Difference]: Without dead ends: 211 [2023-11-23 07:35:09,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 303 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 07:35:09,506 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 553 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:09,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1012 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 07:35:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-23 07:35:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2023-11-23 07:35:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 98 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-11-23 07:35:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 189 transitions. [2023-11-23 07:35:09,529 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 189 transitions. Word has length 137 [2023-11-23 07:35:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:09,530 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 189 transitions. [2023-11-23 07:35:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 16 states have internal predecessors, (123), 10 states have call successors, (47), 5 states have call predecessors, (47), 6 states have return successors, (43), 8 states have call predecessors, (43), 10 states have call successors, (43) [2023-11-23 07:35:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 189 transitions. [2023-11-23 07:35:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-23 07:35:09,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:09,532 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 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] [2023-11-23 07:35:09,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:09,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:09,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 119158810, now seen corresponding path program 1 times [2023-11-23 07:35:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473537406] [2023-11-23 07:35:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:09,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:09,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118376925] [2023-11-23 07:35:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:09,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:09,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:09,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:09,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 07:35:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:10,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 2841 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:35:10,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-23 07:35:10,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:10,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:10,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473537406] [2023-11-23 07:35:10,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:10,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118376925] [2023-11-23 07:35:10,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118376925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:10,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:10,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:35:10,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547635010] [2023-11-23 07:35:10,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:10,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:35:10,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:10,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:35:10,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:35:10,447 INFO L87 Difference]: Start difference. First operand 149 states and 189 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 07:35:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:10,947 INFO L93 Difference]: Finished difference Result 254 states and 322 transitions. [2023-11-23 07:35:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 07:35:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 150 [2023-11-23 07:35:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:10,952 INFO L225 Difference]: With dead ends: 254 [2023-11-23 07:35:10,952 INFO L226 Difference]: Without dead ends: 149 [2023-11-23 07:35:10,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:35:10,953 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 99 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:10,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 981 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 07:35:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-23 07:35:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-23 07:35:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 98 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-23 07:35:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2023-11-23 07:35:10,972 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 150 [2023-11-23 07:35:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:10,972 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2023-11-23 07:35:10,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 07:35:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2023-11-23 07:35:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 07:35:10,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:10,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:11,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:11,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:11,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:11,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:11,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1331707850, now seen corresponding path program 1 times [2023-11-23 07:35:11,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:11,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578947626] [2023-11-23 07:35:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:11,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:11,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:11,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301253632] [2023-11-23 07:35:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:11,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:11,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:11,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:11,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 07:35:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:11,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 3020 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:35:11,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-23 07:35:11,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:11,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:11,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578947626] [2023-11-23 07:35:11,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:11,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301253632] [2023-11-23 07:35:11,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301253632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:11,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:11,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:35:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901862316] [2023-11-23 07:35:11,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:11,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:35:11,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:35:11,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:35:11,936 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 07:35:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:12,221 INFO L93 Difference]: Finished difference Result 239 states and 300 transitions. [2023-11-23 07:35:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:35:12,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 163 [2023-11-23 07:35:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:12,225 INFO L225 Difference]: With dead ends: 239 [2023-11-23 07:35:12,225 INFO L226 Difference]: Without dead ends: 149 [2023-11-23 07:35:12,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:35:12,226 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 9 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:12,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 819 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-23 07:35:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-23 07:35:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.231578947368421) internal successors, (117), 98 states have internal predecessors, (117), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-23 07:35:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 187 transitions. [2023-11-23 07:35:12,240 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 187 transitions. Word has length 163 [2023-11-23 07:35:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:12,240 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 187 transitions. [2023-11-23 07:35:12,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 07:35:12,241 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 187 transitions. [2023-11-23 07:35:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-23 07:35:12,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:12,243 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:12,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:12,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:12,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:12,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1627232802, now seen corresponding path program 1 times [2023-11-23 07:35:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682702352] [2023-11-23 07:35:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:12,544 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:12,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369844986] [2023-11-23 07:35:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:12,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:12,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:12,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:12,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 07:35:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:13,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 3028 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 07:35:13,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-23 07:35:13,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:13,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:13,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682702352] [2023-11-23 07:35:13,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:13,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369844986] [2023-11-23 07:35:13,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369844986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:13,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:13,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:35:13,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070709275] [2023-11-23 07:35:13,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:13,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:35:13,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:35:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:35:13,217 INFO L87 Difference]: Start difference. First operand 149 states and 187 transitions. Second operand has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 07:35:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:13,407 INFO L93 Difference]: Finished difference Result 236 states and 298 transitions. [2023-11-23 07:35:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:35:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 165 [2023-11-23 07:35:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:13,410 INFO L225 Difference]: With dead ends: 236 [2023-11-23 07:35:13,410 INFO L226 Difference]: Without dead ends: 150 [2023-11-23 07:35:13,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:35:13,411 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 6 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:13,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 492 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:35:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-23 07:35:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-11-23 07:35:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 99 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-23 07:35:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2023-11-23 07:35:13,425 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 165 [2023-11-23 07:35:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:13,426 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2023-11-23 07:35:13,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 07:35:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2023-11-23 07:35:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-23 07:35:13,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:13,428 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:13,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:13,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:13,648 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:13,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:13,649 INFO L85 PathProgramCache]: Analyzing trace with hash -150260322, now seen corresponding path program 1 times [2023-11-23 07:35:13,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:13,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611031339] [2023-11-23 07:35:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:13,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:13,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:13,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060155050] [2023-11-23 07:35:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:13,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:13,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:13,738 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:13,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 07:35:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:14,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 07:35:14,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 07:35:14,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:14,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:14,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611031339] [2023-11-23 07:35:14,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:14,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060155050] [2023-11-23 07:35:14,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060155050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:14,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:14,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:35:14,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118952815] [2023-11-23 07:35:14,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:14,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:35:14,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:35:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:35:14,464 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:14,828 INFO L93 Difference]: Finished difference Result 252 states and 323 transitions. [2023-11-23 07:35:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 07:35:14,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 166 [2023-11-23 07:35:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:14,830 INFO L225 Difference]: With dead ends: 252 [2023-11-23 07:35:14,830 INFO L226 Difference]: Without dead ends: 154 [2023-11-23 07:35:14,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:35:14,831 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 6 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:14,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 478 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-23 07:35:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2023-11-23 07:35:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 100 states have internal predecessors, (119), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-23 07:35:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2023-11-23 07:35:14,844 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 166 [2023-11-23 07:35:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:14,844 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2023-11-23 07:35:14,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2023-11-23 07:35:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-23 07:35:14,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:14,847 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:14,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:15,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:15,072 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:15,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:15,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2083450613, now seen corresponding path program 1 times [2023-11-23 07:35:15,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:15,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218196159] [2023-11-23 07:35:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:15,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:15,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:15,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620068669] [2023-11-23 07:35:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:15,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:15,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:15,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:15,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 07:35:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:15,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-23 07:35:15,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:15,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:35:15,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:35:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-23 07:35:16,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:16,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218196159] [2023-11-23 07:35:16,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620068669] [2023-11-23 07:35:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620068669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:16,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:16,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 07:35:16,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531212930] [2023-11-23 07:35:16,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:16,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 07:35:16,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 07:35:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:35:16,436 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 7 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 07:35:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:18,109 INFO L93 Difference]: Finished difference Result 268 states and 337 transitions. [2023-11-23 07:35:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 07:35:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 7 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 166 [2023-11-23 07:35:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:18,111 INFO L225 Difference]: With dead ends: 268 [2023-11-23 07:35:18,111 INFO L226 Difference]: Without dead ends: 173 [2023-11-23 07:35:18,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:35:18,113 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 203 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:18,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 552 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 07:35:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-23 07:35:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2023-11-23 07:35:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 114 states have internal predecessors, (138), 35 states have call successors, (35), 17 states have call predecessors, (35), 19 states have return successors, (38), 35 states have call predecessors, (38), 34 states have call successors, (38) [2023-11-23 07:35:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 211 transitions. [2023-11-23 07:35:18,126 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 211 transitions. Word has length 166 [2023-11-23 07:35:18,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:18,127 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 211 transitions. [2023-11-23 07:35:18,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 7 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 07:35:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 211 transitions. [2023-11-23 07:35:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-23 07:35:18,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:18,129 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:18,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:18,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 07:35:18,351 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:18,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash -886660489, now seen corresponding path program 1 times [2023-11-23 07:35:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:18,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146978803] [2023-11-23 07:35:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:18,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:18,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:18,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580801767] [2023-11-23 07:35:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:18,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:18,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:18,419 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:18,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 07:35:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:18,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 3051 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 07:35:18,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 07:35:18,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:18,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:18,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146978803] [2023-11-23 07:35:18,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:18,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580801767] [2023-11-23 07:35:18,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580801767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:18,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:18,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:35:18,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740064901] [2023-11-23 07:35:18,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:18,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:35:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:35:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:35:18,976 INFO L87 Difference]: Start difference. First operand 166 states and 211 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:19,212 INFO L93 Difference]: Finished difference Result 294 states and 379 transitions. [2023-11-23 07:35:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:35:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 166 [2023-11-23 07:35:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:19,214 INFO L225 Difference]: With dead ends: 294 [2023-11-23 07:35:19,214 INFO L226 Difference]: Without dead ends: 169 [2023-11-23 07:35:19,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:35:19,215 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 7 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:19,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 502 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:35:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-23 07:35:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2023-11-23 07:35:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 114 states have internal predecessors, (137), 35 states have call successors, (35), 17 states have call predecessors, (35), 19 states have return successors, (38), 35 states have call predecessors, (38), 34 states have call successors, (38) [2023-11-23 07:35:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 210 transitions. [2023-11-23 07:35:19,229 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 210 transitions. Word has length 166 [2023-11-23 07:35:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:19,229 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 210 transitions. [2023-11-23 07:35:19,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 210 transitions. [2023-11-23 07:35:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-23 07:35:19,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:19,231 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:19,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 07:35:19,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:19,444 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:19,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash -209630501, now seen corresponding path program 1 times [2023-11-23 07:35:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:19,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336088390] [2023-11-23 07:35:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:19,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:19,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237930989] [2023-11-23 07:35:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:19,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:19,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:19,516 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:19,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 07:35:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:20,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 07:35:20,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 07:35:20,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:20,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:20,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336088390] [2023-11-23 07:35:20,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:20,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237930989] [2023-11-23 07:35:20,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237930989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:20,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:20,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:35:20,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572078131] [2023-11-23 07:35:20,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:20,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:35:20,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:20,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:35:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:35:20,193 INFO L87 Difference]: Start difference. First operand 166 states and 210 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:20,481 INFO L93 Difference]: Finished difference Result 267 states and 341 transitions. [2023-11-23 07:35:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:35:20,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 168 [2023-11-23 07:35:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:20,483 INFO L225 Difference]: With dead ends: 267 [2023-11-23 07:35:20,483 INFO L226 Difference]: Without dead ends: 174 [2023-11-23 07:35:20,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:35:20,484 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 4 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:20,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 675 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-23 07:35:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2023-11-23 07:35:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 114 states have (on average 1.2280701754385965) internal successors, (140), 117 states have internal predecessors, (140), 35 states have call successors, (35), 17 states have call predecessors, (35), 20 states have return successors, (43), 36 states have call predecessors, (43), 34 states have call successors, (43) [2023-11-23 07:35:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 218 transitions. [2023-11-23 07:35:20,497 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 218 transitions. Word has length 168 [2023-11-23 07:35:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:20,498 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 218 transitions. [2023-11-23 07:35:20,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 218 transitions. [2023-11-23 07:35:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 07:35:20,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:20,500 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:20,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:20,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 07:35:20,724 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:20,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash 261030519, now seen corresponding path program 1 times [2023-11-23 07:35:20,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:20,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944131365] [2023-11-23 07:35:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:20,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:20,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:20,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480960125] [2023-11-23 07:35:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:20,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:20,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:20,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 07:35:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:21,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 07:35:21,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-23 07:35:21,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:21,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944131365] [2023-11-23 07:35:21,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480960125] [2023-11-23 07:35:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480960125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:21,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:21,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:35:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095652700] [2023-11-23 07:35:21,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:35:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:35:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:35:21,389 INFO L87 Difference]: Start difference. First operand 170 states and 218 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:21,548 INFO L93 Difference]: Finished difference Result 192 states and 245 transitions. [2023-11-23 07:35:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 07:35:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 170 [2023-11-23 07:35:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:21,549 INFO L225 Difference]: With dead ends: 192 [2023-11-23 07:35:21,549 INFO L226 Difference]: Without dead ends: 171 [2023-11-23 07:35:21,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:35:21,550 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:21,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 502 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:35:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-23 07:35:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-11-23 07:35:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 117 states have internal predecessors, (141), 35 states have call successors, (35), 17 states have call predecessors, (35), 20 states have return successors, (43), 37 states have call predecessors, (43), 34 states have call successors, (43) [2023-11-23 07:35:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2023-11-23 07:35:21,564 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 170 [2023-11-23 07:35:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:21,565 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2023-11-23 07:35:21,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2023-11-23 07:35:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-23 07:35:21,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:21,566 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:21,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-23 07:35:21,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 07:35:21,775 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:21,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash 468045275, now seen corresponding path program 2 times [2023-11-23 07:35:21,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:21,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394504399] [2023-11-23 07:35:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:21,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:21,855 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:21,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973016516] [2023-11-23 07:35:21,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:35:21,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:21,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:21,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:21,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 07:35:22,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 07:35:22,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:22,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:35:22,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-23 07:35:22,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:22,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:22,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394504399] [2023-11-23 07:35:22,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:22,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973016516] [2023-11-23 07:35:22,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973016516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:22,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:22,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:35:22,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2704373] [2023-11-23 07:35:22,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:22,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:35:22,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:35:22,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:35:22,416 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 6 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-23 07:35:22,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:22,755 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2023-11-23 07:35:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:35:22,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 172 [2023-11-23 07:35:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:22,757 INFO L225 Difference]: With dead ends: 179 [2023-11-23 07:35:22,757 INFO L226 Difference]: Without dead ends: 177 [2023-11-23 07:35:22,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:35:22,757 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 5 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:22,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 831 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-23 07:35:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2023-11-23 07:35:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 120 states have internal predecessors, (144), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:35:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 224 transitions. [2023-11-23 07:35:22,775 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 224 transitions. Word has length 172 [2023-11-23 07:35:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:22,775 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 224 transitions. [2023-11-23 07:35:22,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-23 07:35:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 224 transitions. [2023-11-23 07:35:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 07:35:22,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:22,777 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:22,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:22,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 07:35:22,996 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:22,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -334738305, now seen corresponding path program 1 times [2023-11-23 07:35:22,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:22,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557219089] [2023-11-23 07:35:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:22,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:23,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:23,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744003927] [2023-11-23 07:35:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:23,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:23,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:23,062 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:23,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 07:35:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:23,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 07:35:23,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:23,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:35:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-23 07:35:23,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:23,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:23,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557219089] [2023-11-23 07:35:23,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:23,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744003927] [2023-11-23 07:35:23,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744003927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:23,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:23,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 07:35:23,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750084591] [2023-11-23 07:35:23,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:23,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 07:35:23,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 07:35:23,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:35:23,869 INFO L87 Difference]: Start difference. First operand 176 states and 224 transitions. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 7 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 07:35:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:25,235 INFO L93 Difference]: Finished difference Result 319 states and 408 transitions. [2023-11-23 07:35:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 07:35:25,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 7 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 174 [2023-11-23 07:35:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:25,237 INFO L225 Difference]: With dead ends: 319 [2023-11-23 07:35:25,237 INFO L226 Difference]: Without dead ends: 195 [2023-11-23 07:35:25,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-23 07:35:25,239 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 152 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:25,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 597 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 07:35:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-23 07:35:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 185. [2023-11-23 07:35:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 36 states have call successors, (36), 18 states have call predecessors, (36), 22 states have return successors, (47), 39 states have call predecessors, (47), 35 states have call successors, (47) [2023-11-23 07:35:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 236 transitions. [2023-11-23 07:35:25,253 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 236 transitions. Word has length 174 [2023-11-23 07:35:25,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:25,254 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 236 transitions. [2023-11-23 07:35:25,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 7 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 07:35:25,254 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 236 transitions. [2023-11-23 07:35:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 07:35:25,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:25,256 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:25,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:25,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 07:35:25,472 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:25,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:25,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1477240771, now seen corresponding path program 1 times [2023-11-23 07:35:25,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:25,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866749886] [2023-11-23 07:35:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:25,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:25,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:25,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869831435] [2023-11-23 07:35:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:25,554 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:25,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 07:35:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:26,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 3068 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 07:35:26,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-23 07:35:26,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:26,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866749886] [2023-11-23 07:35:26,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:26,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869831435] [2023-11-23 07:35:26,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869831435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:26,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:26,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:35:26,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543777958] [2023-11-23 07:35:26,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:26,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:35:26,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:35:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:35:26,265 INFO L87 Difference]: Start difference. First operand 185 states and 236 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:26,501 INFO L93 Difference]: Finished difference Result 310 states and 391 transitions. [2023-11-23 07:35:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:35:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 174 [2023-11-23 07:35:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:26,503 INFO L225 Difference]: With dead ends: 310 [2023-11-23 07:35:26,503 INFO L226 Difference]: Without dead ends: 195 [2023-11-23 07:35:26,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:35:26,504 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 7 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:26,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 656 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:35:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-23 07:35:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2023-11-23 07:35:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 122 states have internal predecessors, (146), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:35:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 226 transitions. [2023-11-23 07:35:26,517 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 226 transitions. Word has length 174 [2023-11-23 07:35:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:26,518 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 226 transitions. [2023-11-23 07:35:26,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 226 transitions. [2023-11-23 07:35:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 07:35:26,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:26,520 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:26,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:26,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:26,733 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:26,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2019646977, now seen corresponding path program 1 times [2023-11-23 07:35:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:26,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369493435] [2023-11-23 07:35:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:26,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:26,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:26,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637037412] [2023-11-23 07:35:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:26,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:26,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:26,807 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:26,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 07:35:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:27,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 3068 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 07:35:27,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-23 07:35:27,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:27,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:27,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369493435] [2023-11-23 07:35:27,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:27,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637037412] [2023-11-23 07:35:27,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637037412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:27,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:27,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 07:35:27,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077782380] [2023-11-23 07:35:27,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:27,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 07:35:27,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:27,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 07:35:27,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:35:27,589 INFO L87 Difference]: Start difference. First operand 178 states and 226 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 6 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-23 07:35:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:28,970 INFO L93 Difference]: Finished difference Result 310 states and 392 transitions. [2023-11-23 07:35:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 07:35:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 6 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 174 [2023-11-23 07:35:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:28,971 INFO L225 Difference]: With dead ends: 310 [2023-11-23 07:35:28,972 INFO L226 Difference]: Without dead ends: 188 [2023-11-23 07:35:28,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-23 07:35:28,973 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 127 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:28,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 488 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 07:35:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-23 07:35:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2023-11-23 07:35:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 124 states have internal predecessors, (147), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:35:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 227 transitions. [2023-11-23 07:35:28,988 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 227 transitions. Word has length 174 [2023-11-23 07:35:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:28,988 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 227 transitions. [2023-11-23 07:35:28,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 6 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-23 07:35:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 227 transitions. [2023-11-23 07:35:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 07:35:28,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:28,990 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:29,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:29,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 07:35:29,208 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:29,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1436286657, now seen corresponding path program 1 times [2023-11-23 07:35:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:29,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080716624] [2023-11-23 07:35:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:29,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:29,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:29,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476400607] [2023-11-23 07:35:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:29,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:29,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:29,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:29,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 07:35:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:29,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 07:35:29,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-23 07:35:29,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:29,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:29,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080716624] [2023-11-23 07:35:29,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:29,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476400607] [2023-11-23 07:35:29,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476400607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:29,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:29,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:35:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151568382] [2023-11-23 07:35:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:35:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:35:29,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:35:29,864 INFO L87 Difference]: Start difference. First operand 180 states and 227 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:29,992 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2023-11-23 07:35:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:35:29,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 174 [2023-11-23 07:35:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:29,994 INFO L225 Difference]: With dead ends: 302 [2023-11-23 07:35:29,994 INFO L226 Difference]: Without dead ends: 184 [2023-11-23 07:35:29,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:35:29,995 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 2 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:29,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 497 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:35:29,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-23 07:35:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2023-11-23 07:35:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 126 states have internal predecessors, (148), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:35:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 228 transitions. [2023-11-23 07:35:30,009 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 228 transitions. Word has length 174 [2023-11-23 07:35:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:30,010 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 228 transitions. [2023-11-23 07:35:30,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:35:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 228 transitions. [2023-11-23 07:35:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 07:35:30,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:30,011 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:30,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:30,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:30,228 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:30,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash 781343741, now seen corresponding path program 1 times [2023-11-23 07:35:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:30,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887109257] [2023-11-23 07:35:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:30,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:30,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450486034] [2023-11-23 07:35:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:30,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:30,291 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:30,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 07:35:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:30,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 3060 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-23 07:35:30,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:30,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:35:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-23 07:35:31,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:31,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:31,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887109257] [2023-11-23 07:35:31,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:31,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450486034] [2023-11-23 07:35:31,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450486034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:31,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:31,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 07:35:31,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449058749] [2023-11-23 07:35:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:31,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 07:35:31,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 07:35:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:35:31,056 INFO L87 Difference]: Start difference. First operand 182 states and 228 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 7 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 07:35:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:32,106 INFO L93 Difference]: Finished difference Result 323 states and 409 transitions. [2023-11-23 07:35:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 07:35:32,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 7 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 174 [2023-11-23 07:35:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:32,108 INFO L225 Difference]: With dead ends: 323 [2023-11-23 07:35:32,108 INFO L226 Difference]: Without dead ends: 182 [2023-11-23 07:35:32,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-23 07:35:32,109 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 116 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:32,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 541 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 07:35:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-23 07:35:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-23 07:35:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 124 states have (on average 1.185483870967742) internal successors, (147), 126 states have internal predecessors, (147), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:35:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2023-11-23 07:35:32,123 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 174 [2023-11-23 07:35:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:32,124 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2023-11-23 07:35:32,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 7 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 07:35:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2023-11-23 07:35:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 07:35:32,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:32,125 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2023-11-23 07:35:32,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:32,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:32,348 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:32,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash -213349957, now seen corresponding path program 1 times [2023-11-23 07:35:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:32,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184160081] [2023-11-23 07:35:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:32,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:32,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:32,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457269159] [2023-11-23 07:35:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:32,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:32,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:32,405 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:32,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 07:35:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:33,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-23 07:35:33,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-23 07:35:33,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-23 07:35:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:33,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184160081] [2023-11-23 07:35:33,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457269159] [2023-11-23 07:35:33,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457269159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:33,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-11-23 07:35:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178288841] [2023-11-23 07:35:33,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:33,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 07:35:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 07:35:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:35:33,548 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand has 11 states, 10 states have (on average 10.8) internal successors, (108), 11 states have internal predecessors, (108), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-11-23 07:35:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:34,153 INFO L93 Difference]: Finished difference Result 313 states and 410 transitions. [2023-11-23 07:35:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 07:35:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 10.8) internal successors, (108), 11 states have internal predecessors, (108), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 174 [2023-11-23 07:35:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:34,155 INFO L225 Difference]: With dead ends: 313 [2023-11-23 07:35:34,155 INFO L226 Difference]: Without dead ends: 194 [2023-11-23 07:35:34,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-23 07:35:34,157 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 22 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:34,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 970 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 07:35:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-23 07:35:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2023-11-23 07:35:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 130 states have (on average 1.2) internal successors, (156), 132 states have internal predecessors, (156), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:35:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2023-11-23 07:35:34,172 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 174 [2023-11-23 07:35:34,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:34,173 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2023-11-23 07:35:34,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 10.8) internal successors, (108), 11 states have internal predecessors, (108), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-11-23 07:35:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2023-11-23 07:35:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-23 07:35:34,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:34,174 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 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, 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] [2023-11-23 07:35:34,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:34,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:34,388 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:34,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1285040159, now seen corresponding path program 1 times [2023-11-23 07:35:34,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:34,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398178500] [2023-11-23 07:35:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:34,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:34,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:34,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847641665] [2023-11-23 07:35:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:34,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:34,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:34,473 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:34,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 07:35:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:35,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:35:35,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-11-23 07:35:35,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:35,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398178500] [2023-11-23 07:35:35,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847641665] [2023-11-23 07:35:35,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847641665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:35,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:35,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:35:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821236165] [2023-11-23 07:35:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:35,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:35:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:35:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:35:35,269 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-23 07:35:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:35,583 INFO L93 Difference]: Finished difference Result 311 states and 390 transitions. [2023-11-23 07:35:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 07:35:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) Word has length 190 [2023-11-23 07:35:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:35,585 INFO L225 Difference]: With dead ends: 311 [2023-11-23 07:35:35,585 INFO L226 Difference]: Without dead ends: 186 [2023-11-23 07:35:35,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:35:35,586 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 45 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:35,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1011 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-23 07:35:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2023-11-23 07:35:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 129 states have (on average 1.193798449612403) internal successors, (154), 130 states have internal predecessors, (154), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-23 07:35:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 233 transitions. [2023-11-23 07:35:35,601 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 233 transitions. Word has length 190 [2023-11-23 07:35:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:35,601 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 233 transitions. [2023-11-23 07:35:35,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-23 07:35:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 233 transitions. [2023-11-23 07:35:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-23 07:35:35,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:35,603 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 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, 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] [2023-11-23 07:35:35,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:35,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:35,816 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:35,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:35,817 INFO L85 PathProgramCache]: Analyzing trace with hash 147133484, now seen corresponding path program 2 times [2023-11-23 07:35:35,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:35,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297820330] [2023-11-23 07:35:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:35,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:35,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066806375] [2023-11-23 07:35:35,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:35:35,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:35,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:35,882 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) [2023-11-23 07:35:35,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 07:35:36,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:35:36,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:36,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 3128 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 07:35:36,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-11-23 07:35:36,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-23 07:35:37,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297820330] [2023-11-23 07:35:37,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066806375] [2023-11-23 07:35:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066806375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:37,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:37,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-23 07:35:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797081243] [2023-11-23 07:35:37,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 07:35:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:37,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 07:35:37,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-23 07:35:37,103 INFO L87 Difference]: Start difference. First operand 186 states and 233 transitions. Second operand has 13 states, 11 states have (on average 8.181818181818182) internal successors, (90), 13 states have internal predecessors, (90), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:37,404 INFO L93 Difference]: Finished difference Result 301 states and 375 transitions. [2023-11-23 07:35:37,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 07:35:37,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.181818181818182) internal successors, (90), 13 states have internal predecessors, (90), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 192 [2023-11-23 07:35:37,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:37,407 INFO L225 Difference]: With dead ends: 301 [2023-11-23 07:35:37,407 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 07:35:37,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-23 07:35:37,408 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 12 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:37,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1134 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 07:35:37,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-23 07:35:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 131 states have internal predecessors, (155), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-23 07:35:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 234 transitions. [2023-11-23 07:35:37,423 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 234 transitions. Word has length 192 [2023-11-23 07:35:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:37,423 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 234 transitions. [2023-11-23 07:35:37,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.181818181818182) internal successors, (90), 13 states have internal predecessors, (90), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 234 transitions. [2023-11-23 07:35:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-23 07:35:37,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:37,425 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 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, 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] [2023-11-23 07:35:37,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:37,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-23 07:35:37,645 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:37,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1376692612, now seen corresponding path program 3 times [2023-11-23 07:35:37,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:37,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244831111] [2023-11-23 07:35:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:37,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:37,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:37,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346174798] [2023-11-23 07:35:37,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:35:37,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:37,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:37,708 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) [2023-11-23 07:35:37,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 07:35:38,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 07:35:38,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:38,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 2076 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 07:35:38,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 90 proven. 3 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-11-23 07:35:38,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-23 07:35:38,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:38,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244831111] [2023-11-23 07:35:38,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346174798] [2023-11-23 07:35:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346174798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:38,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-23 07:35:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410384085] [2023-11-23 07:35:38,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 07:35:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 07:35:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-23 07:35:38,736 INFO L87 Difference]: Start difference. First operand 187 states and 234 transitions. Second operand has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:39,411 INFO L93 Difference]: Finished difference Result 303 states and 377 transitions. [2023-11-23 07:35:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 07:35:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 193 [2023-11-23 07:35:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:39,413 INFO L225 Difference]: With dead ends: 303 [2023-11-23 07:35:39,413 INFO L226 Difference]: Without dead ends: 188 [2023-11-23 07:35:39,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-23 07:35:39,415 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 15 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:39,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1782 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 07:35:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-23 07:35:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-11-23 07:35:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 132 states have internal predecessors, (156), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-23 07:35:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 235 transitions. [2023-11-23 07:35:39,430 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 235 transitions. Word has length 193 [2023-11-23 07:35:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:39,430 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 235 transitions. [2023-11-23 07:35:39,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 7.076923076923077) internal successors, (92), 15 states have internal predecessors, (92), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 235 transitions. [2023-11-23 07:35:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-23 07:35:39,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:39,432 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 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, 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] [2023-11-23 07:35:39,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:39,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-23 07:35:39,648 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:39,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash 838319916, now seen corresponding path program 4 times [2023-11-23 07:35:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:39,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723530640] [2023-11-23 07:35:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:39,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:39,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:39,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66328828] [2023-11-23 07:35:39,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:35:39,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:39,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:39,715 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) [2023-11-23 07:35:39,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 07:35:40,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:35:40,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:40,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 3166 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 07:35:40,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 90 proven. 22 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2023-11-23 07:35:40,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-23 07:35:40,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:40,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723530640] [2023-11-23 07:35:40,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:40,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66328828] [2023-11-23 07:35:40,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66328828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:40,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:40,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2023-11-23 07:35:40,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775373731] [2023-11-23 07:35:40,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:40,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 07:35:40,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 07:35:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:35:40,837 INFO L87 Difference]: Start difference. First operand 188 states and 235 transitions. Second operand has 22 states, 20 states have (on average 5.3) internal successors, (106), 22 states have internal predecessors, (106), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2023-11-23 07:35:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:42,056 INFO L93 Difference]: Finished difference Result 314 states and 405 transitions. [2023-11-23 07:35:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 07:35:42,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 5.3) internal successors, (106), 22 states have internal predecessors, (106), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 194 [2023-11-23 07:35:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:42,058 INFO L225 Difference]: With dead ends: 314 [2023-11-23 07:35:42,058 INFO L226 Difference]: Without dead ends: 198 [2023-11-23 07:35:42,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-11-23 07:35:42,059 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 30 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2544 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:42,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2544 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 07:35:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-23 07:35:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2023-11-23 07:35:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 133 states have internal predecessors, (157), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-23 07:35:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2023-11-23 07:35:42,085 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 194 [2023-11-23 07:35:42,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:42,085 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2023-11-23 07:35:42,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 5.3) internal successors, (106), 22 states have internal predecessors, (106), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2023-11-23 07:35:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2023-11-23 07:35:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-23 07:35:42,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:42,088 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 4, 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, 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] [2023-11-23 07:35:42,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:42,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:42,310 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:42,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:42,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1328635524, now seen corresponding path program 5 times [2023-11-23 07:35:42,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:42,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454943593] [2023-11-23 07:35:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:42,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:42,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:42,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039240894] [2023-11-23 07:35:42,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 07:35:42,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:42,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:42,376 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) [2023-11-23 07:35:42,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-23 07:35:42,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-23 07:35:42,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:42,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-23 07:35:42,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:42,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-23 07:35:45,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-23 07:35:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-23 07:35:47,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:35:47,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:47,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454943593] [2023-11-23 07:35:47,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:47,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039240894] [2023-11-23 07:35:47,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039240894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:35:47,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:35:47,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 07:35:47,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850975268] [2023-11-23 07:35:47,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:35:47,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 07:35:47,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 07:35:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=198, Unknown=2, NotChecked=0, Total=240 [2023-11-23 07:35:47,241 INFO L87 Difference]: Start difference. First operand 189 states and 236 transitions. Second operand has 16 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 9 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2023-11-23 07:35:54,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:35:56,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:36:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:01,465 INFO L93 Difference]: Finished difference Result 441 states and 554 transitions. [2023-11-23 07:36:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-23 07:36:01,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 9 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 195 [2023-11-23 07:36:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:01,467 INFO L225 Difference]: With dead ends: 441 [2023-11-23 07:36:01,467 INFO L226 Difference]: Without dead ends: 326 [2023-11-23 07:36:01,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=190, Invalid=1136, Unknown=6, NotChecked=0, Total=1332 [2023-11-23 07:36:01,469 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 344 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 137 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:01,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 884 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1792 Invalid, 6 Unknown, 0 Unchecked, 5.8s Time] [2023-11-23 07:36:01,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-23 07:36:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 320. [2023-11-23 07:36:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 225 states have (on average 1.1822222222222223) internal successors, (266), 228 states have internal predecessors, (266), 60 states have call successors, (60), 32 states have call predecessors, (60), 34 states have return successors, (77), 60 states have call predecessors, (77), 59 states have call successors, (77) [2023-11-23 07:36:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 403 transitions. [2023-11-23 07:36:01,535 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 403 transitions. Word has length 195 [2023-11-23 07:36:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:01,535 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 403 transitions. [2023-11-23 07:36:01,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 9 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2023-11-23 07:36:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 403 transitions. [2023-11-23 07:36:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-23 07:36:01,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:01,537 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:01,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:01,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:01,748 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:01,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash -764876852, now seen corresponding path program 1 times [2023-11-23 07:36:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:01,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569078379] [2023-11-23 07:36:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:01,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:01,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:01,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029113062] [2023-11-23 07:36:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:01,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:01,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:01,808 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) [2023-11-23 07:36:01,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-23 07:36:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:03,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 07:36:03,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 122 proven. 16 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-23 07:36:03,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-11-23 07:36:03,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569078379] [2023-11-23 07:36:03,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029113062] [2023-11-23 07:36:03,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029113062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:03,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:03,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-23 07:36:03,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480869196] [2023-11-23 07:36:03,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:03,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 07:36:03,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 07:36:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:36:03,957 INFO L87 Difference]: Start difference. First operand 320 states and 403 transitions. Second operand has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-23 07:36:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:04,783 INFO L93 Difference]: Finished difference Result 594 states and 816 transitions. [2023-11-23 07:36:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:36:04,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 202 [2023-11-23 07:36:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:04,786 INFO L225 Difference]: With dead ends: 594 [2023-11-23 07:36:04,786 INFO L226 Difference]: Without dead ends: 380 [2023-11-23 07:36:04,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2023-11-23 07:36:04,787 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 69 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:04,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1476 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 07:36:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-23 07:36:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 344. [2023-11-23 07:36:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 249 states have (on average 1.21285140562249) internal successors, (302), 252 states have internal predecessors, (302), 60 states have call successors, (60), 32 states have call predecessors, (60), 34 states have return successors, (77), 60 states have call predecessors, (77), 59 states have call successors, (77) [2023-11-23 07:36:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 439 transitions. [2023-11-23 07:36:04,824 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 439 transitions. Word has length 202 [2023-11-23 07:36:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:04,824 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 439 transitions. [2023-11-23 07:36:04,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-23 07:36:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 439 transitions. [2023-11-23 07:36:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-23 07:36:04,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:04,827 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 8, 8, 8, 8, 5, 5, 4, 3, 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, 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] [2023-11-23 07:36:04,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-23 07:36:05,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:05,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2116519647, now seen corresponding path program 1 times [2023-11-23 07:36:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:05,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771707017] [2023-11-23 07:36:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:05,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:05,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099654026] [2023-11-23 07:36:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:05,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:05,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:05,120 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) [2023-11-23 07:36:05,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-23 07:36:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:05,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 3867 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 07:36:05,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 131 proven. 10 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-23 07:36:05,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-11-23 07:36:06,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:06,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771707017] [2023-11-23 07:36:06,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:06,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099654026] [2023-11-23 07:36:06,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099654026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:06,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:06,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-23 07:36:06,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678449293] [2023-11-23 07:36:06,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:06,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 07:36:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 07:36:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-23 07:36:06,338 INFO L87 Difference]: Start difference. First operand 344 states and 439 transitions. Second operand has 19 states, 17 states have (on average 8.352941176470589) internal successors, (142), 19 states have internal predecessors, (142), 6 states have call successors, (43), 2 states have call predecessors, (43), 5 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) [2023-11-23 07:36:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:07,117 INFO L93 Difference]: Finished difference Result 498 states and 637 transitions. [2023-11-23 07:36:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 07:36:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 8.352941176470589) internal successors, (142), 19 states have internal predecessors, (142), 6 states have call successors, (43), 2 states have call predecessors, (43), 5 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) Word has length 271 [2023-11-23 07:36:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:07,120 INFO L225 Difference]: With dead ends: 498 [2023-11-23 07:36:07,120 INFO L226 Difference]: Without dead ends: 345 [2023-11-23 07:36:07,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 522 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:36:07,123 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 16 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:07,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1940 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 07:36:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-23 07:36:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2023-11-23 07:36:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 250 states have (on average 1.212) internal successors, (303), 253 states have internal predecessors, (303), 60 states have call successors, (60), 32 states have call predecessors, (60), 34 states have return successors, (77), 60 states have call predecessors, (77), 59 states have call successors, (77) [2023-11-23 07:36:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 440 transitions. [2023-11-23 07:36:07,159 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 440 transitions. Word has length 271 [2023-11-23 07:36:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:07,159 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 440 transitions. [2023-11-23 07:36:07,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 8.352941176470589) internal successors, (142), 19 states have internal predecessors, (142), 6 states have call successors, (43), 2 states have call predecessors, (43), 5 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) [2023-11-23 07:36:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 440 transitions. [2023-11-23 07:36:07,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-23 07:36:07,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:07,162 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 8, 8, 8, 5, 5, 4, 3, 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, 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] [2023-11-23 07:36:07,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:07,380 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,SelfDestructingSolverStorable27 [2023-11-23 07:36:07,381 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:07,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:07,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1187021371, now seen corresponding path program 2 times [2023-11-23 07:36:07,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:07,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294154270] [2023-11-23 07:36:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:07,450 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:07,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040795662] [2023-11-23 07:36:07,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:36:07,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:07,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:07,452 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) [2023-11-23 07:36:07,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-23 07:36:08,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 07:36:08,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:08,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:36:08,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2023-11-23 07:36:08,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:36:08,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:08,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294154270] [2023-11-23 07:36:08,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:08,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040795662] [2023-11-23 07:36:08,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040795662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:36:08,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:36:08,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:36:08,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066993604] [2023-11-23 07:36:08,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:36:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:36:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:36:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:36:08,067 INFO L87 Difference]: Start difference. First operand 345 states and 440 transitions. Second operand has 6 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) [2023-11-23 07:36:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:08,298 INFO L93 Difference]: Finished difference Result 352 states and 446 transitions. [2023-11-23 07:36:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:36:08,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) Word has length 273 [2023-11-23 07:36:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:08,300 INFO L225 Difference]: With dead ends: 352 [2023-11-23 07:36:08,300 INFO L226 Difference]: Without dead ends: 345 [2023-11-23 07:36:08,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:36:08,301 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 5 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:08,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 840 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:36:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-23 07:36:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2023-11-23 07:36:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 250 states have (on average 1.212) internal successors, (303), 253 states have internal predecessors, (303), 60 states have call successors, (60), 32 states have call predecessors, (60), 34 states have return successors, (76), 60 states have call predecessors, (76), 59 states have call successors, (76) [2023-11-23 07:36:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 439 transitions. [2023-11-23 07:36:08,332 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 439 transitions. Word has length 273 [2023-11-23 07:36:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:08,333 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 439 transitions. [2023-11-23 07:36:08,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) [2023-11-23 07:36:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 439 transitions. [2023-11-23 07:36:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-11-23 07:36:08,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:08,335 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 10, 8, 8, 8, 4, 4, 3, 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, 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] [2023-11-23 07:36:08,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-23 07:36:08,548 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,SelfDestructingSolverStorable28 [2023-11-23 07:36:08,548 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:08,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:08,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1360998054, now seen corresponding path program 1 times [2023-11-23 07:36:08,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:08,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87571715] [2023-11-23 07:36:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:08,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:08,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:08,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541258884] [2023-11-23 07:36:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:08,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:08,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:08,643 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) [2023-11-23 07:36:08,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-23 07:36:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:09,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 3928 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-23 07:36:09,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 156 proven. 15 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2023-11-23 07:36:09,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-11-23 07:36:09,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:09,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87571715] [2023-11-23 07:36:09,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:09,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541258884] [2023-11-23 07:36:09,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541258884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:09,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:09,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-23 07:36:09,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354560397] [2023-11-23 07:36:09,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:09,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 07:36:09,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 07:36:09,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-23 07:36:09,952 INFO L87 Difference]: Start difference. First operand 345 states and 439 transitions. Second operand has 21 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 21 states have internal predecessors, (138), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:10,642 INFO L93 Difference]: Finished difference Result 500 states and 637 transitions. [2023-11-23 07:36:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 07:36:10,642 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 21 states have internal predecessors, (138), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 279 [2023-11-23 07:36:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:10,644 INFO L225 Difference]: With dead ends: 500 [2023-11-23 07:36:10,645 INFO L226 Difference]: Without dead ends: 346 [2023-11-23 07:36:10,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 536 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-23 07:36:10,646 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 12 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:10,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1616 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 07:36:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-23 07:36:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2023-11-23 07:36:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 251 states have (on average 1.2111553784860558) internal successors, (304), 254 states have internal predecessors, (304), 60 states have call successors, (60), 32 states have call predecessors, (60), 34 states have return successors, (76), 60 states have call predecessors, (76), 59 states have call successors, (76) [2023-11-23 07:36:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 440 transitions. [2023-11-23 07:36:10,678 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 440 transitions. Word has length 279 [2023-11-23 07:36:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:10,678 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 440 transitions. [2023-11-23 07:36:10,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 21 states have internal predecessors, (138), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 440 transitions. [2023-11-23 07:36:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-11-23 07:36:10,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:10,681 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 12, 8, 8, 8, 4, 4, 3, 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, 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] [2023-11-23 07:36:10,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-23 07:36:10,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:10,904 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:10,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 777308798, now seen corresponding path program 2 times [2023-11-23 07:36:10,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:10,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306284788] [2023-11-23 07:36:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:10,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:10,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:10,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908985560] [2023-11-23 07:36:10,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:36:10,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:10,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:10,969 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) [2023-11-23 07:36:10,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-23 07:36:12,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:36:12,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:12,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 3966 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-23 07:36:12,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2023-11-23 07:36:12,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2023-11-23 07:36:12,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:12,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306284788] [2023-11-23 07:36:12,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:12,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908985560] [2023-11-23 07:36:12,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908985560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:12,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:12,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-23 07:36:12,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692779382] [2023-11-23 07:36:12,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:12,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 07:36:12,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:12,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 07:36:12,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:36:12,592 INFO L87 Difference]: Start difference. First operand 346 states and 440 transitions. Second operand has 23 states, 21 states have (on average 6.666666666666667) internal successors, (140), 23 states have internal predecessors, (140), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:13,142 INFO L93 Difference]: Finished difference Result 502 states and 639 transitions. [2023-11-23 07:36:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:36:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 6.666666666666667) internal successors, (140), 23 states have internal predecessors, (140), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 281 [2023-11-23 07:36:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:13,144 INFO L225 Difference]: With dead ends: 502 [2023-11-23 07:36:13,145 INFO L226 Difference]: Without dead ends: 347 [2023-11-23 07:36:13,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-23 07:36:13,146 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 17 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:13,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1616 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 07:36:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-23 07:36:13,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2023-11-23 07:36:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 252 states have (on average 1.2103174603174602) internal successors, (305), 255 states have internal predecessors, (305), 60 states have call successors, (60), 32 states have call predecessors, (60), 34 states have return successors, (76), 60 states have call predecessors, (76), 59 states have call successors, (76) [2023-11-23 07:36:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 441 transitions. [2023-11-23 07:36:13,180 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 441 transitions. Word has length 281 [2023-11-23 07:36:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:13,180 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 441 transitions. [2023-11-23 07:36:13,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 6.666666666666667) internal successors, (140), 23 states have internal predecessors, (140), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 441 transitions. [2023-11-23 07:36:13,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-11-23 07:36:13,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:13,183 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 14, 8, 8, 8, 4, 4, 3, 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, 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] [2023-11-23 07:36:13,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:13,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:13,396 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:13,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash 828796352, now seen corresponding path program 3 times [2023-11-23 07:36:13,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:13,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849663468] [2023-11-23 07:36:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:13,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:13,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:13,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62311945] [2023-11-23 07:36:13,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:36:13,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:13,481 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) [2023-11-23 07:36:13,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-23 07:36:16,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-23 07:36:16,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:16,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-23 07:36:16,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 341 proven. 44 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-11-23 07:36:16,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:16,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:36:16,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 60 [2023-11-23 07:36:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 59 proven. 270 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2023-11-23 07:36:17,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:17,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849663468] [2023-11-23 07:36:17,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:17,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62311945] [2023-11-23 07:36:17,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62311945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:17,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:17,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2023-11-23 07:36:17,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202682055] [2023-11-23 07:36:17,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:17,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 07:36:17,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:17,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 07:36:17,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-11-23 07:36:17,222 INFO L87 Difference]: Start difference. First operand 347 states and 441 transitions. Second operand has 20 states, 17 states have (on average 7.705882352941177) internal successors, (131), 18 states have internal predecessors, (131), 9 states have call successors, (37), 5 states have call predecessors, (37), 6 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) [2023-11-23 07:36:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:20,144 INFO L93 Difference]: Finished difference Result 576 states and 745 transitions. [2023-11-23 07:36:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 07:36:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 7.705882352941177) internal successors, (131), 18 states have internal predecessors, (131), 9 states have call successors, (37), 5 states have call predecessors, (37), 6 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) Word has length 285 [2023-11-23 07:36:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:20,147 INFO L225 Difference]: With dead ends: 576 [2023-11-23 07:36:20,147 INFO L226 Difference]: Without dead ends: 532 [2023-11-23 07:36:20,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 547 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-11-23 07:36:20,148 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 285 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 144 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:20,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1389 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1882 Invalid, 9 Unknown, 0 Unchecked, 2.6s Time] [2023-11-23 07:36:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-11-23 07:36:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 530. [2023-11-23 07:36:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 373 states have (on average 1.1903485254691688) internal successors, (444), 379 states have internal predecessors, (444), 100 states have call successors, (100), 53 states have call predecessors, (100), 56 states have return successors, (142), 97 states have call predecessors, (142), 99 states have call successors, (142) [2023-11-23 07:36:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 686 transitions. [2023-11-23 07:36:20,203 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 686 transitions. Word has length 285 [2023-11-23 07:36:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:20,203 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 686 transitions. [2023-11-23 07:36:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 7.705882352941177) internal successors, (131), 18 states have internal predecessors, (131), 9 states have call successors, (37), 5 states have call predecessors, (37), 6 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) [2023-11-23 07:36:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 686 transitions. [2023-11-23 07:36:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-23 07:36:20,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:20,207 INFO L195 NwaCegarLoop]: trace histogram [23, 21, 14, 8, 8, 8, 4, 4, 3, 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, 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] [2023-11-23 07:36:20,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:20,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:20,420 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:20,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash -738447163, now seen corresponding path program 4 times [2023-11-23 07:36:20,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:20,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713564868] [2023-11-23 07:36:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:20,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:20,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644065745] [2023-11-23 07:36:20,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:36:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:20,592 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) [2023-11-23 07:36:20,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-23 07:36:21,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:36:21,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:21,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 4016 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 07:36:21,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 186 proven. 28 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2023-11-23 07:36:21,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-11-23 07:36:22,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:22,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713564868] [2023-11-23 07:36:22,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:22,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644065745] [2023-11-23 07:36:22,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644065745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:22,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:22,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-23 07:36:22,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802696848] [2023-11-23 07:36:22,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:22,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 07:36:22,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 07:36:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-23 07:36:22,149 INFO L87 Difference]: Start difference. First operand 530 states and 686 transitions. Second operand has 25 states, 23 states have (on average 6.173913043478261) internal successors, (142), 25 states have internal predecessors, (142), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:22,936 INFO L93 Difference]: Finished difference Result 811 states and 1066 transitions. [2023-11-23 07:36:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 07:36:22,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 6.173913043478261) internal successors, (142), 25 states have internal predecessors, (142), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 287 [2023-11-23 07:36:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:22,939 INFO L225 Difference]: With dead ends: 811 [2023-11-23 07:36:22,939 INFO L226 Difference]: Without dead ends: 531 [2023-11-23 07:36:22,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 548 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-11-23 07:36:22,943 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 16 mSDsluCounter, 1938 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:22,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2103 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 07:36:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-11-23 07:36:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2023-11-23 07:36:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 374 states have (on average 1.1898395721925135) internal successors, (445), 380 states have internal predecessors, (445), 100 states have call successors, (100), 53 states have call predecessors, (100), 56 states have return successors, (142), 97 states have call predecessors, (142), 99 states have call successors, (142) [2023-11-23 07:36:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 687 transitions. [2023-11-23 07:36:23,001 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 687 transitions. Word has length 287 [2023-11-23 07:36:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:23,001 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 687 transitions. [2023-11-23 07:36:23,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 6.173913043478261) internal successors, (142), 25 states have internal predecessors, (142), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 687 transitions. [2023-11-23 07:36:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-23 07:36:23,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:23,006 INFO L195 NwaCegarLoop]: trace histogram [23, 21, 16, 8, 8, 8, 4, 4, 3, 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, 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] [2023-11-23 07:36:23,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:23,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-23 07:36:23,220 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:23,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1623928601, now seen corresponding path program 5 times [2023-11-23 07:36:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:23,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491675110] [2023-11-23 07:36:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:23,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:23,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:23,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760512138] [2023-11-23 07:36:23,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 07:36:23,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:23,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:23,314 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) [2023-11-23 07:36:23,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process Killed by 15