./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.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_init_dynamic_harness-1.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 f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 07:34:47,501 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 07:34:47,551 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 07:34:47,555 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 07:34:47,555 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 07:34:47,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 07:34:47,569 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 07:34:47,569 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 07:34:47,570 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 07:34:47,570 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 07:34:47,570 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 07:34:47,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 07:34:47,571 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 07:34:47,571 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 07:34:47,572 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 07:34:47,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 07:34:47,572 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 07:34:47,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 07:34:47,573 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 07:34:47,573 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 07:34:47,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 07:34:47,574 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 07:34:47,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 07:34:47,574 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 07:34:47,575 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 07:34:47,575 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 07:34:47,575 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 07:34:47,576 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 07:34:47,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:34:47,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 07:34:47,577 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 07:34:47,577 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 07:34:47,577 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 07:34:47,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 07:34:47,578 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 07:34:47,578 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 07:34:47,578 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 07:34:47,578 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 07:34:47,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 07:34:47,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-23 07:34:47,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 07:34:47,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 07:34:47,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 07:34:47,828 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 07:34:47,829 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 07:34:47,830 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2023-11-23 07:34:49,099 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 07:34:49,514 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 07:34:49,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2023-11-23 07:34:49,547 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7310e8d/507b4c8d87d14747b8df67362f92fe4e/FLAGbc97f2565 [2023-11-23 07:34:49,560 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7310e8d/507b4c8d87d14747b8df67362f92fe4e [2023-11-23 07:34:49,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 07:34:49,564 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 07:34:49,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 07:34:49,566 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 07:34:49,570 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 07:34:49,571 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:34:49" (1/1) ... [2023-11-23 07:34:49,571 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6fb358 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 07:34:49,571 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:34:49" (1/1) ... [2023-11-23 07:34:49,689 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 07:34:49,901 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_init_dynamic_harness-1.i[4505,4518] [2023-11-23 07:34:49,907 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_init_dynamic_harness-1.i[4565,4578] [2023-11-23 07:34:50,415 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,416 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,416 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,417 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,417 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,429 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,432 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,433 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,433 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,632 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:34:50,633 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:34:50,634 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:34:50,639 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:34:50,640 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:34:50,642 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:34:50,642 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:34:50,643 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:34:50,643 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:34:50,644 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:34:50,739 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,740 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:34:50,846 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 07:34:50,861 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_init_dynamic_harness-1.i[4505,4518] [2023-11-23 07:34:50,862 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_init_dynamic_harness-1.i[4565,4578] [2023-11-23 07:34:50,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,918 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,920 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,920 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,926 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,927 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,927 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,928 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:50,968 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:34:50,969 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:34:50,970 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:34:50,971 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:34:50,971 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:34:50,971 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:34:50,973 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:34:50,973 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:34:50,973 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:34:50,974 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:34:51,011 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,012 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:51,017 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-23 07:34:51,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:34:51,204 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,204 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,205 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,205 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,205 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,205 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,205 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,205 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,206 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,206 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,206 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,206 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,206 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,206 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,207 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:51,213 INFO L206 MainTranslator]: Completed translation [2023-11-23 07:34:51,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:51 WrapperNode [2023-11-23 07:34:51,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 07:34:51,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 07:34:51,216 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 07:34:51,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 07:34:51,222 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 07:34:51,283 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 07:34:51,356 INFO L138 Inliner]: procedures = 688, calls = 1518, calls flagged for inlining = 52, calls inlined = 9, statements flattened = 740 [2023-11-23 07:34:51,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 07:34:51,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 07:34:51,357 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 07:34:51,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 07:34:51,374 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 07:34:51,374 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 07:34:51,387 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 07:34:51,448 INFO L188 MemorySlicer]: Split 288 memory accesses to 6 slices as follows [2, 35, 236, 7, 5, 3]. 82 percent of accesses are in the largest equivalence class. The 247 initializations are split as follows [2, 0, 236, 1, 5, 3]. The 7 writes are split as follows [0, 6, 0, 1, 0, 0]. [2023-11-23 07:34:51,449 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 07:34:51,449 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 07:34:51,476 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 07:34:51,480 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 07:34:51,500 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 07:34:51,503 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 07:34:51,518 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 07:34:51,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 07:34:51,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 07:34:51,519 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 07:34:51,519 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 07:34:51,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:34:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:51,574 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 07:34:51,614 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 07:34:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 07:34:51,649 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 07:34:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 07:34:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 07:34:51,649 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 07:34:51,650 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-23 07:34:51,650 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 07:34:51,650 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 07:34:51,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 07:34:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 07:34:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 07:34:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-23 07:34:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 07:34:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-23 07:34:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-23 07:34:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-23 07:34:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 07:34:51,652 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 07:34:51,652 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 07:34:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 07:34:51,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-23 07:34:51,653 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-23 07:34:51,653 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 07:34:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 07:34:51,853 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 07:34:51,854 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 07:34:52,511 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 07:34:52,581 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 07:34:52,582 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 07:34:52,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:34:52 BoogieIcfgContainer [2023-11-23 07:34:52,583 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 07:34:52,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 07:34:52,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 07:34:52,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 07:34:52,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 07:34:49" (1/3) ... [2023-11-23 07:34:52,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e0f340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:34:52, skipping insertion in model container [2023-11-23 07:34:52,588 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 07:34:52,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e0f340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:34:52, skipping insertion in model container [2023-11-23 07:34:52,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:34:52" (3/3) ... [2023-11-23 07:34:52,593 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness-1.i [2023-11-23 07:34:52,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 07:34:52,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 07:34:52,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 07:34:52,659 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;@26de6414, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 07:34:52,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 07:34:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 114 states have (on average 1.2982456140350878) internal successors, (148), 114 states have internal predecessors, (148), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-23 07:34:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 07:34:52,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:52,673 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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 07:34:52,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:52,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:52,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1151027879, now seen corresponding path program 1 times [2023-11-23 07:34:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:52,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939734026] [2023-11-23 07:34:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:52,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:53,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:53,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939734026] [2023-11-23 07:34:53,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 07:34:53,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164378224] [2023-11-23 07:34:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:53,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:53,135 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 07:34:53,176 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 07:34:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:53,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 2276 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 07:34:53,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-23 07:34:53,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:53,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164378224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:53,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:53,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 07:34:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826965964] [2023-11-23 07:34:53,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:53,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 07:34:53,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:53,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 07:34:53,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 07:34:53,651 INFO L87 Difference]: Start difference. First operand has 186 states, 114 states have (on average 1.2982456140350878) internal successors, (148), 114 states have internal predecessors, (148), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 07:34:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:53,839 INFO L93 Difference]: Finished difference Result 364 states and 548 transitions. [2023-11-23 07:34:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 07:34:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 103 [2023-11-23 07:34:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:53,848 INFO L225 Difference]: With dead ends: 364 [2023-11-23 07:34:53,849 INFO L226 Difference]: Without dead ends: 182 [2023-11-23 07:34:53,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 07:34:53,854 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:53,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 235 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:34:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-23 07:34:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-23 07:34:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 111 states have internal predecessors, (137), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-23 07:34:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 247 transitions. [2023-11-23 07:34:53,891 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 247 transitions. Word has length 103 [2023-11-23 07:34:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:53,892 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 247 transitions. [2023-11-23 07:34:53,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 07:34:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 247 transitions. [2023-11-23 07:34:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-23 07:34:53,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:53,896 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2023-11-23 07:34:53,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 07:34:54,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 07:34:54,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:54,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2118296214, now seen corresponding path program 1 times [2023-11-23 07:34:54,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:54,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415774415] [2023-11-23 07:34:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:54,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:54,255 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:54,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635413923] [2023-11-23 07:34:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:54,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:54,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:54,256 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 07:34:54,280 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 07:34:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:54,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 07:34:54,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-11-23 07:34:54,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:34:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-23 07:34:54,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:54,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415774415] [2023-11-23 07:34:54,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:54,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635413923] [2023-11-23 07:34:54,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635413923] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 07:34:54,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:34:54,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-23 07:34:54,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979955506] [2023-11-23 07:34:54,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:54,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:34:54,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:34:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:34:54,997 INFO L87 Difference]: Start difference. First operand 182 states and 247 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 07:34:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:55,299 INFO L93 Difference]: Finished difference Result 192 states and 262 transitions. [2023-11-23 07:34:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:34:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 133 [2023-11-23 07:34:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:55,303 INFO L225 Difference]: With dead ends: 192 [2023-11-23 07:34:55,303 INFO L226 Difference]: Without dead ends: 190 [2023-11-23 07:34:55,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-23 07:34:55,304 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 6 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:55,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1122 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:34:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-23 07:34:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2023-11-23 07:34:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 113 states have (on average 1.247787610619469) internal successors, (141), 116 states have internal predecessors, (141), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (61), 55 states have call predecessors, (61), 55 states have call successors, (61) [2023-11-23 07:34:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 259 transitions. [2023-11-23 07:34:55,318 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 259 transitions. Word has length 133 [2023-11-23 07:34:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:55,319 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 259 transitions. [2023-11-23 07:34:55,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 07:34:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 259 transitions. [2023-11-23 07:34:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-23 07:34:55,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:55,322 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2023-11-23 07:34:55,348 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 07:34:55,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 07:34:55,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:55,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash -550234015, now seen corresponding path program 1 times [2023-11-23 07:34:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:55,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139178308] [2023-11-23 07:34:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:55,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:55,676 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:55,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843197173] [2023-11-23 07:34:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:55,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:55,680 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 07:34:55,726 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 07:34:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 07:34:56,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-11-23 07:34:56,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:56,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:56,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139178308] [2023-11-23 07:34:56,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:56,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843197173] [2023-11-23 07:34:56,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843197173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:56,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:56,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:34:56,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789814760] [2023-11-23 07:34:56,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:56,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:34:56,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:34:56,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:34:56,276 INFO L87 Difference]: Start difference. First operand 189 states and 259 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-23 07:34:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:56,511 INFO L93 Difference]: Finished difference Result 362 states and 491 transitions. [2023-11-23 07:34:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:34:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 133 [2023-11-23 07:34:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:56,513 INFO L225 Difference]: With dead ends: 362 [2023-11-23 07:34:56,513 INFO L226 Difference]: Without dead ends: 189 [2023-11-23 07:34:56,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 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 07:34:56,515 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 9 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:56,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1112 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-23 07:34:56,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-11-23 07:34:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 113 states have (on average 1.238938053097345) internal successors, (140), 116 states have internal predecessors, (140), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (61), 55 states have call predecessors, (61), 55 states have call successors, (61) [2023-11-23 07:34:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 258 transitions. [2023-11-23 07:34:56,525 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 258 transitions. Word has length 133 [2023-11-23 07:34:56,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:56,526 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 258 transitions. [2023-11-23 07:34:56,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-23 07:34:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 258 transitions. [2023-11-23 07:34:56,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 07:34:56,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:56,527 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2023-11-23 07:34:56,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 07:34:56,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:56,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:56,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1737610161, now seen corresponding path program 1 times [2023-11-23 07:34:56,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:56,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533911662] [2023-11-23 07:34:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:56,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:56,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:56,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129235164] [2023-11-23 07:34:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:56,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:56,784 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 07:34:56,786 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 07:34:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 07:34:57,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-11-23 07:34:57,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:57,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:57,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533911662] [2023-11-23 07:34:57,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:57,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129235164] [2023-11-23 07:34:57,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129235164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:57,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:57,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 07:34:57,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466609990] [2023-11-23 07:34:57,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 07:34:57,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 07:34:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:34:57,237 INFO L87 Difference]: Start difference. First operand 189 states and 258 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-23 07:34:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:57,505 INFO L93 Difference]: Finished difference Result 364 states and 492 transitions. [2023-11-23 07:34:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 07:34:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 137 [2023-11-23 07:34:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:57,507 INFO L225 Difference]: With dead ends: 364 [2023-11-23 07:34:57,507 INFO L226 Difference]: Without dead ends: 190 [2023-11-23 07:34:57,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:34:57,508 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 11 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:57,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1112 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-23 07:34:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-11-23 07:34:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 114 states have (on average 1.236842105263158) internal successors, (141), 117 states have internal predecessors, (141), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (61), 55 states have call predecessors, (61), 55 states have call successors, (61) [2023-11-23 07:34:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 259 transitions. [2023-11-23 07:34:57,518 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 259 transitions. Word has length 137 [2023-11-23 07:34:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:57,518 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 259 transitions. [2023-11-23 07:34:57,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-23 07:34:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 259 transitions. [2023-11-23 07:34:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 07:34:57,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:57,520 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2023-11-23 07:34:57,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 07:34:57,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:57,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:57,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash -938073455, now seen corresponding path program 1 times [2023-11-23 07:34:57,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:57,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436903107] [2023-11-23 07:34:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:57,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:57,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:57,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634261460] [2023-11-23 07:34:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:57,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:57,844 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 07:34:57,845 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 07:34:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:58,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 07:34:58,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-23 07:34:58,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:58,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:58,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436903107] [2023-11-23 07:34:58,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:58,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634261460] [2023-11-23 07:34:58,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634261460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:58,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:58,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:34:58,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626061409] [2023-11-23 07:34:58,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:58,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:34:58,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:58,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:34:58,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:34:58,325 INFO L87 Difference]: Start difference. First operand 190 states and 259 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 07:34:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:58,550 INFO L93 Difference]: Finished difference Result 294 states and 405 transitions. [2023-11-23 07:34:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:34:58,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 139 [2023-11-23 07:34:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:58,552 INFO L225 Difference]: With dead ends: 294 [2023-11-23 07:34:58,552 INFO L226 Difference]: Without dead ends: 194 [2023-11-23 07:34:58,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 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 07:34:58,553 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:58,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 906 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-23 07:34:58,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-11-23 07:34:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 120 states have internal predecessors, (144), 57 states have call successors, (57), 17 states have call predecessors, (57), 19 states have return successors, (64), 56 states have call predecessors, (64), 55 states have call successors, (64) [2023-11-23 07:34:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2023-11-23 07:34:58,572 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 139 [2023-11-23 07:34:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:58,573 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2023-11-23 07:34:58,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 07:34:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2023-11-23 07:34:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 07:34:58,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:58,574 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:58,593 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 07:34:58,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:58,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:58,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1338503939, now seen corresponding path program 1 times [2023-11-23 07:34:58,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:58,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570576137] [2023-11-23 07:34:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:58,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:58,842 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:58,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297206323] [2023-11-23 07:34:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:58,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:58,856 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 07:34:58,881 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 07:34:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:59,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 2658 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 07:34:59,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-11-23 07:34:59,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:34:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-11-23 07:34:59,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:59,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570576137] [2023-11-23 07:34:59,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:59,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297206323] [2023-11-23 07:34:59,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297206323] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 07:34:59,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:34:59,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-11-23 07:34:59,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402537688] [2023-11-23 07:34:59,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:59,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:34:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:34:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:34:59,418 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 07:34:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:59,652 INFO L93 Difference]: Finished difference Result 202 states and 273 transitions. [2023-11-23 07:34:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:34:59,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 139 [2023-11-23 07:34:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:59,654 INFO L225 Difference]: With dead ends: 202 [2023-11-23 07:34:59,654 INFO L226 Difference]: Without dead ends: 200 [2023-11-23 07:34:59,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:34:59,654 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 4 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:59,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 895 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-23 07:34:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2023-11-23 07:34:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 120 states have (on average 1.225) internal successors, (147), 124 states have internal predecessors, (147), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:34:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 270 transitions. [2023-11-23 07:34:59,662 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 270 transitions. Word has length 139 [2023-11-23 07:34:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:59,663 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 270 transitions. [2023-11-23 07:34:59,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 07:34:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 270 transitions. [2023-11-23 07:34:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 07:34:59,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:59,664 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:59,684 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 07:34:59,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:59,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:59,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:59,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656897, now seen corresponding path program 1 times [2023-11-23 07:34:59,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:59,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017963617] [2023-11-23 07:34:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:59,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:59,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:59,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364552437] [2023-11-23 07:34:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:59,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:59,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:59,923 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 07:34:59,953 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 07:35:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:00,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 07:35:00,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-23 07:35:00,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-11-23 07:35:00,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017963617] [2023-11-23 07:35:00,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364552437] [2023-11-23 07:35:00,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364552437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:00,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:00,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-23 07:35:00,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696026215] [2023-11-23 07:35:00,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:00,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 07:35:00,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 07:35:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-23 07:35:00,723 INFO L87 Difference]: Start difference. First operand 199 states and 270 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:01,421 INFO L93 Difference]: Finished difference Result 384 states and 515 transitions. [2023-11-23 07:35:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 07:35:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 139 [2023-11-23 07:35:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:01,423 INFO L225 Difference]: With dead ends: 384 [2023-11-23 07:35:01,423 INFO L226 Difference]: Without dead ends: 200 [2023-11-23 07:35:01,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-23 07:35:01,424 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 11 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:01,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1773 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 07:35:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-23 07:35:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-11-23 07:35:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 125 states have internal predecessors, (148), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:35:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 271 transitions. [2023-11-23 07:35:01,443 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 271 transitions. Word has length 139 [2023-11-23 07:35:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:01,444 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 271 transitions. [2023-11-23 07:35:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 271 transitions. [2023-11-23 07:35:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-23 07:35:01,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:01,445 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 3, 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] [2023-11-23 07:35:01,461 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 07:35:01,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:01,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:01,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2021376545, now seen corresponding path program 2 times [2023-11-23 07:35:01,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:01,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961739720] [2023-11-23 07:35:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:01,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:01,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:01,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667978714] [2023-11-23 07:35:01,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:35:01,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:01,712 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 07:35:01,757 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 07:35:02,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:35:02,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:02,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 07:35:02,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 158 proven. 3 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-23 07:35:02,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-23 07:35:02,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:02,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961739720] [2023-11-23 07:35:02,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:02,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667978714] [2023-11-23 07:35:02,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667978714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:02,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:02,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-23 07:35:02,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605954106] [2023-11-23 07:35:02,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:02,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 07:35:02,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:02,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 07:35:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-23 07:35:02,657 INFO L87 Difference]: Start difference. First operand 200 states and 271 transitions. Second operand has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:03,515 INFO L93 Difference]: Finished difference Result 386 states and 517 transitions. [2023-11-23 07:35:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 07:35:03,516 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 141 [2023-11-23 07:35:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:03,517 INFO L225 Difference]: With dead ends: 386 [2023-11-23 07:35:03,517 INFO L226 Difference]: Without dead ends: 201 [2023-11-23 07:35:03,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-23 07:35:03,518 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 11 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:03,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1996 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 07:35:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-23 07:35:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-11-23 07:35:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 122 states have (on average 1.221311475409836) internal successors, (149), 126 states have internal predecessors, (149), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:35:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 272 transitions. [2023-11-23 07:35:03,525 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 272 transitions. Word has length 141 [2023-11-23 07:35:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:03,525 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 272 transitions. [2023-11-23 07:35:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 272 transitions. [2023-11-23 07:35:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-23 07:35:03,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:03,536 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 3, 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] [2023-11-23 07:35:03,554 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 07:35:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 07:35:03,755 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:03,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:03,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1665876801, now seen corresponding path program 3 times [2023-11-23 07:35:03,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:03,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290855827] [2023-11-23 07:35:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:03,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:03,810 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:03,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413861583] [2023-11-23 07:35:03,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:35:03,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:03,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:03,812 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 07:35:03,859 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 07:35:04,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 07:35:04,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:04,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 2202 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 07:35:04,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-11-23 07:35:05,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2023-11-23 07:35:05,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:05,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290855827] [2023-11-23 07:35:05,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:05,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413861583] [2023-11-23 07:35:05,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413861583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:05,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:05,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-23 07:35:05,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261415253] [2023-11-23 07:35:05,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:05,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 07:35:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 07:35:05,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-23 07:35:05,321 INFO L87 Difference]: Start difference. First operand 201 states and 272 transitions. Second operand has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 07:35:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:06,067 INFO L93 Difference]: Finished difference Result 388 states and 519 transitions. [2023-11-23 07:35:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 07:35:06,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 143 [2023-11-23 07:35:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:06,069 INFO L225 Difference]: With dead ends: 388 [2023-11-23 07:35:06,069 INFO L226 Difference]: Without dead ends: 202 [2023-11-23 07:35:06,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-23 07:35:06,070 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 11 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:06,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2217 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 07:35:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-23 07:35:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-11-23 07:35:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 123 states have (on average 1.2195121951219512) internal successors, (150), 127 states have internal predecessors, (150), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:35:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 273 transitions. [2023-11-23 07:35:06,077 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 273 transitions. Word has length 143 [2023-11-23 07:35:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:06,077 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 273 transitions. [2023-11-23 07:35:06,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.266666666666667) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 07:35:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 273 transitions. [2023-11-23 07:35:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 07:35:06,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:06,079 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 8, 3, 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] [2023-11-23 07:35:06,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:06,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:06,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:06,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash 485895839, now seen corresponding path program 4 times [2023-11-23 07:35:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:06,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62977278] [2023-11-23 07:35:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:06,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:06,341 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:06,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334082235] [2023-11-23 07:35:06,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:35:06,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:06,342 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 07:35:06,370 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 07:35:07,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:35:07,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:07,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 07:35:07,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 174 proven. 10 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-23 07:35:07,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-23 07:35:07,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62977278] [2023-11-23 07:35:07,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334082235] [2023-11-23 07:35:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334082235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:07,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:07,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-23 07:35:07,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144576546] [2023-11-23 07:35:07,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:07,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 07:35:07,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 07:35:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-23 07:35:07,533 INFO L87 Difference]: Start difference. First operand 202 states and 273 transitions. Second operand has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:08,718 INFO L93 Difference]: Finished difference Result 390 states and 521 transitions. [2023-11-23 07:35:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 07:35:08,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 145 [2023-11-23 07:35:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:08,720 INFO L225 Difference]: With dead ends: 390 [2023-11-23 07:35:08,720 INFO L226 Difference]: Without dead ends: 203 [2023-11-23 07:35:08,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:35:08,723 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 10 mSDsluCounter, 2876 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:08,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3101 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 07:35:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-23 07:35:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-11-23 07:35:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 124 states have (on average 1.217741935483871) internal successors, (151), 128 states have internal predecessors, (151), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:35:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 274 transitions. [2023-11-23 07:35:08,730 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 274 transitions. Word has length 145 [2023-11-23 07:35:08,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:08,730 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 274 transitions. [2023-11-23 07:35:08,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 274 transitions. [2023-11-23 07:35:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-23 07:35:08,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:08,733 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 3, 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] [2023-11-23 07:35:08,766 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 07:35:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 07:35:08,950 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:08,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1142087039, now seen corresponding path program 5 times [2023-11-23 07:35:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294094148] [2023-11-23 07:35:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:09,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:09,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513212810] [2023-11-23 07:35:09,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 07:35:09,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:09,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:09,021 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 07:35:09,066 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 07:35:09,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-23 07:35:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:09,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 07:35:09,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 185 proven. 15 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-23 07:35:09,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-23 07:35:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294094148] [2023-11-23 07:35:10,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513212810] [2023-11-23 07:35:10,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513212810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:10,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:10,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-23 07:35:10,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137638681] [2023-11-23 07:35:10,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:10,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 07:35:10,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:10,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 07:35:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-23 07:35:10,125 INFO L87 Difference]: Start difference. First operand 203 states and 274 transitions. Second operand has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:11,024 INFO L93 Difference]: Finished difference Result 392 states and 523 transitions. [2023-11-23 07:35:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:35:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 147 [2023-11-23 07:35:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:11,026 INFO L225 Difference]: With dead ends: 392 [2023-11-23 07:35:11,026 INFO L226 Difference]: Without dead ends: 204 [2023-11-23 07:35:11,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-11-23 07:35:11,027 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 12 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:11,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2437 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 07:35:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-23 07:35:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-23 07:35:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 125 states have (on average 1.216) internal successors, (152), 129 states have internal predecessors, (152), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:35:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 275 transitions. [2023-11-23 07:35:11,033 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 275 transitions. Word has length 147 [2023-11-23 07:35:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:11,033 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 275 transitions. [2023-11-23 07:35:11,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 275 transitions. [2023-11-23 07:35:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-23 07:35:11,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:11,034 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 3, 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] [2023-11-23 07:35:11,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:11,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 07:35:11,235 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:11,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1823096993, now seen corresponding path program 6 times [2023-11-23 07:35:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772431229] [2023-11-23 07:35:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:11,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:11,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365021938] [2023-11-23 07:35:11,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 07:35:11,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:11,333 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 07:35:11,357 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 07:35:20,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-23 07:35:20,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:20,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 07:35:20,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 68 proven. 21 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-23 07:35:20,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-11-23 07:35:20,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:20,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772431229] [2023-11-23 07:35:20,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:20,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365021938] [2023-11-23 07:35:20,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365021938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:20,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:20,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-23 07:35:20,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953286167] [2023-11-23 07:35:20,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:20,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 07:35:20,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 07:35:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:35:20,869 INFO L87 Difference]: Start difference. First operand 204 states and 275 transitions. Second operand has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 07:35:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:21,914 INFO L93 Difference]: Finished difference Result 394 states and 525 transitions. [2023-11-23 07:35:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:35:21,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 149 [2023-11-23 07:35:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:21,915 INFO L225 Difference]: With dead ends: 394 [2023-11-23 07:35:21,916 INFO L226 Difference]: Without dead ends: 205 [2023-11-23 07:35:21,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-23 07:35:21,917 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 16 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:21,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2215 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 07:35:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-23 07:35:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-11-23 07:35:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 130 states have internal predecessors, (153), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:35:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 276 transitions. [2023-11-23 07:35:21,925 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 276 transitions. Word has length 149 [2023-11-23 07:35:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:21,925 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 276 transitions. [2023-11-23 07:35:21,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 07:35:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 276 transitions. [2023-11-23 07:35:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-23 07:35:21,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:21,926 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 3, 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] [2023-11-23 07:35:21,951 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 07:35:22,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 07:35:22,127 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:22,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 866033215, now seen corresponding path program 7 times [2023-11-23 07:35:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:22,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850370253] [2023-11-23 07:35:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:22,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:22,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999755617] [2023-11-23 07:35:22,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 07:35:22,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:22,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:22,184 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 07:35:22,185 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 07:35:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:35:23,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 2891 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-23 07:35:23,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 213 proven. 28 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-23 07:35:23,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2023-11-23 07:35:23,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850370253] [2023-11-23 07:35:23,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999755617] [2023-11-23 07:35:23,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999755617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:23,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:23,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-23 07:35:23,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147469089] [2023-11-23 07:35:23,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:23,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 07:35:23,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:23,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 07:35:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-23 07:35:23,990 INFO L87 Difference]: Start difference. First operand 205 states and 276 transitions. Second operand has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 25 states have internal predecessors, (83), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:25,239 INFO L93 Difference]: Finished difference Result 396 states and 527 transitions. [2023-11-23 07:35:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 07:35:25,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 25 states have internal predecessors, (83), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 151 [2023-11-23 07:35:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:25,240 INFO L225 Difference]: With dead ends: 396 [2023-11-23 07:35:25,241 INFO L226 Difference]: Without dead ends: 206 [2023-11-23 07:35:25,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-11-23 07:35:25,242 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 11 mSDsluCounter, 3098 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3323 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:25,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3323 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 07:35:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-23 07:35:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-23 07:35:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 131 states have internal predecessors, (154), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:35:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 277 transitions. [2023-11-23 07:35:25,248 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 277 transitions. Word has length 151 [2023-11-23 07:35:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:25,248 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 277 transitions. [2023-11-23 07:35:25,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 25 states have internal predecessors, (83), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 277 transitions. [2023-11-23 07:35:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-23 07:35:25,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:25,250 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 3, 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] [2023-11-23 07:35:25,292 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 07:35:25,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 07:35:25,471 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:25,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:25,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1781338081, now seen corresponding path program 8 times [2023-11-23 07:35:25,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:25,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569801705] [2023-11-23 07:35:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:25,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:25,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:25,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701672721] [2023-11-23 07:35:25,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:35:25,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:25,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:25,558 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 07:35:25,576 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 07:35:26,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:35:26,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:26,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 2929 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 07:35:26,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 230 proven. 36 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-11-23 07:35:26,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-23 07:35:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569801705] [2023-11-23 07:35:27,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701672721] [2023-11-23 07:35:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701672721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:27,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:27,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-11-23 07:35:27,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792251933] [2023-11-23 07:35:27,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 07:35:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 07:35:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-11-23 07:35:27,052 INFO L87 Difference]: Start difference. First operand 206 states and 277 transitions. Second operand has 27 states, 25 states have (on average 3.4) internal successors, (85), 27 states have internal predecessors, (85), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:28,302 INFO L93 Difference]: Finished difference Result 398 states and 529 transitions. [2023-11-23 07:35:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 07:35:28,302 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.4) internal successors, (85), 27 states have internal predecessors, (85), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 153 [2023-11-23 07:35:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:28,303 INFO L225 Difference]: With dead ends: 398 [2023-11-23 07:35:28,303 INFO L226 Difference]: Without dead ends: 207 [2023-11-23 07:35:28,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2023-11-23 07:35:28,304 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 10 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3985 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:28,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3985 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 07:35:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-23 07:35:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-11-23 07:35:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.2109375) internal successors, (155), 132 states have internal predecessors, (155), 58 states have call successors, (58), 18 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 56 states have call successors, (65) [2023-11-23 07:35:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 278 transitions. [2023-11-23 07:35:28,313 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 278 transitions. Word has length 153 [2023-11-23 07:35:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:28,314 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 278 transitions. [2023-11-23 07:35:28,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.4) internal successors, (85), 27 states have internal predecessors, (85), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-23 07:35:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 278 transitions. [2023-11-23 07:35:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 07:35:28,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:28,316 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 3, 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] [2023-11-23 07:35:28,354 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 07:35:28,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:28,537 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:28,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1601700097, now seen corresponding path program 9 times [2023-11-23 07:35:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:28,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078052137] [2023-11-23 07:35:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:28,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:28,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399901503] [2023-11-23 07:35:28,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:35:28,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:28,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:28,599 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 07:35:28,601 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 07:36:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 07:36:13,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:13,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 2394 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-23 07:36:13,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:14,209 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 19 treesize of output 1 [2023-11-23 07:36:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-23 07:36:14,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:14,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078052137] [2023-11-23 07:36:14,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399901503] [2023-11-23 07:36:14,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399901503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:36:14,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:36:14,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-23 07:36:14,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145221768] [2023-11-23 07:36:14,667 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:14,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 07:36:14,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:14,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 07:36:14,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:36:14,668 INFO L87 Difference]: Start difference. First operand 207 states and 278 transitions. Second operand has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-11-23 07:36:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:18,096 INFO L93 Difference]: Finished difference Result 431 states and 580 transitions. [2023-11-23 07:36:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 07:36:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 155 [2023-11-23 07:36:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:18,098 INFO L225 Difference]: With dead ends: 431 [2023-11-23 07:36:18,098 INFO L226 Difference]: Without dead ends: 332 [2023-11-23 07:36:18,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 07:36:18,100 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 285 mSDsluCounter, 2101 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:18,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 2258 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2429 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 07:36:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-23 07:36:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 323. [2023-11-23 07:36:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 203 states have (on average 1.2315270935960592) internal successors, (250), 209 states have internal predecessors, (250), 87 states have call successors, (87), 32 states have call predecessors, (87), 32 states have return successors, (91), 81 states have call predecessors, (91), 83 states have call successors, (91) [2023-11-23 07:36:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 428 transitions. [2023-11-23 07:36:18,112 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 428 transitions. Word has length 155 [2023-11-23 07:36:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:18,112 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 428 transitions. [2023-11-23 07:36:18,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-11-23 07:36:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 428 transitions. [2023-11-23 07:36:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-23 07:36:18,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:18,114 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 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] [2023-11-23 07:36:18,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-23 07:36:18,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 07:36:18,328 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:18,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:18,329 INFO L85 PathProgramCache]: Analyzing trace with hash -273037063, now seen corresponding path program 1 times [2023-11-23 07:36:18,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:18,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409561817] [2023-11-23 07:36:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:18,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:18,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:18,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52934303] [2023-11-23 07:36:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:18,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:18,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:18,387 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 07:36:18,388 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 07:36:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:19,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-23 07:36:19,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 245 proven. 45 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-11-23 07:36:19,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2023-11-23 07:36:20,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:20,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409561817] [2023-11-23 07:36:20,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:20,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52934303] [2023-11-23 07:36:20,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52934303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:20,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:20,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-11-23 07:36:20,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195527981] [2023-11-23 07:36:20,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:20,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 07:36:20,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 07:36:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-11-23 07:36:20,063 INFO L87 Difference]: Start difference. First operand 323 states and 428 transitions. Second operand has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 29 states have internal predecessors, (96), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) [2023-11-23 07:36:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:21,418 INFO L93 Difference]: Finished difference Result 618 states and 819 transitions. [2023-11-23 07:36:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 07:36:21,419 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 29 states have internal predecessors, (96), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) Word has length 159 [2023-11-23 07:36:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:21,420 INFO L225 Difference]: With dead ends: 618 [2023-11-23 07:36:21,420 INFO L226 Difference]: Without dead ends: 324 [2023-11-23 07:36:21,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-11-23 07:36:21,422 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 11 mSDsluCounter, 3982 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4207 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:21,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 4207 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 07:36:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-23 07:36:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2023-11-23 07:36:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 204 states have (on average 1.2303921568627452) internal successors, (251), 210 states have internal predecessors, (251), 87 states have call successors, (87), 32 states have call predecessors, (87), 32 states have return successors, (91), 81 states have call predecessors, (91), 83 states have call successors, (91) [2023-11-23 07:36:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 429 transitions. [2023-11-23 07:36:21,437 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 429 transitions. Word has length 159 [2023-11-23 07:36:21,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:21,437 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 429 transitions. [2023-11-23 07:36:21,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 29 states have internal predecessors, (96), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 6 states have call predecessors, (38), 6 states have call successors, (38) [2023-11-23 07:36:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 429 transitions. [2023-11-23 07:36:21,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-23 07:36:21,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:21,439 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 12, 12, 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] [2023-11-23 07:36:21,475 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 07:36:21,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 07:36:21,653 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:21,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1616616153, now seen corresponding path program 2 times [2023-11-23 07:36:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:21,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153155844] [2023-11-23 07:36:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:21,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:21,714 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:21,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5531442] [2023-11-23 07:36:21,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:36:21,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:21,715 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 07:36:21,742 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 07:36:22,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:36:22,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:22,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-23 07:36:22,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 35 proven. 210 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2023-11-23 07:36:23,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 129 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-23 07:36:23,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:23,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153155844] [2023-11-23 07:36:23,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:23,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5531442] [2023-11-23 07:36:23,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5531442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:23,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:23,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 17] total 41 [2023-11-23 07:36:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304976920] [2023-11-23 07:36:23,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:23,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-23 07:36:23,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:23,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-23 07:36:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 07:36:23,853 INFO L87 Difference]: Start difference. First operand 324 states and 429 transitions. Second operand has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2023-11-23 07:36:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:25,561 INFO L93 Difference]: Finished difference Result 620 states and 821 transitions. [2023-11-23 07:36:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 07:36:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) Word has length 161 [2023-11-23 07:36:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:25,563 INFO L225 Difference]: With dead ends: 620 [2023-11-23 07:36:25,563 INFO L226 Difference]: Without dead ends: 325 [2023-11-23 07:36:25,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 07:36:25,564 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 17 mSDsluCounter, 5336 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5561 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:25,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5561 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 07:36:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-23 07:36:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-11-23 07:36:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 205 states have (on average 1.2292682926829268) internal successors, (252), 211 states have internal predecessors, (252), 87 states have call successors, (87), 32 states have call predecessors, (87), 32 states have return successors, (91), 81 states have call predecessors, (91), 83 states have call successors, (91) [2023-11-23 07:36:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 430 transitions. [2023-11-23 07:36:25,575 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 430 transitions. Word has length 161 [2023-11-23 07:36:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:25,576 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 430 transitions. [2023-11-23 07:36:25,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2023-11-23 07:36:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 430 transitions. [2023-11-23 07:36:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 07:36:25,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:25,577 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 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] [2023-11-23 07:36:25,614 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 07:36:25,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 07:36:25,796 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:25,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash 776104377, now seen corresponding path program 3 times [2023-11-23 07:36:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:25,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309301004] [2023-11-23 07:36:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:25,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:25,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:25,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555759667] [2023-11-23 07:36:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:36:25,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:25,885 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 07:36:25,926 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 07:36:48,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 07:36:48,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:48,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 124 conjunts are in the unsatisfiable core [2023-11-23 07:36:48,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:48,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 07:36:48,366 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 84 treesize of output 68 [2023-11-23 07:36:48,379 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:48,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:48,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:48,485 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:36:48,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 27 [2023-11-23 07:36:48,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:48,519 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:36:48,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2023-11-23 07:36:48,598 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 84 treesize of output 68 [2023-11-23 07:36:48,606 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:48,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:48,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 8 [2023-11-23 07:36:48,825 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 84 treesize of output 68 [2023-11-23 07:36:48,850 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:48,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:48,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 36 [2023-11-23 07:36:49,112 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 84 treesize of output 68 [2023-11-23 07:36:49,122 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:49,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:49,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 8 [2023-11-23 07:36:49,327 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 84 treesize of output 68 [2023-11-23 07:36:49,336 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:49,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:49,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 07:36:49,578 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 84 treesize of output 68 [2023-11-23 07:36:49,586 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:49,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:49,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:49,632 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:36:49,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 67 [2023-11-23 07:36:49,780 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 84 treesize of output 68 [2023-11-23 07:36:49,791 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:49,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:49,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 36 [2023-11-23 07:36:50,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2023-11-23 07:36:50,028 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:50,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:50,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:50,128 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:36:50,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 27 [2023-11-23 07:36:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:50,160 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:36:50,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2023-11-23 07:36:50,223 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 84 treesize of output 68 [2023-11-23 07:36:50,233 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:50,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:50,370 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:36:50,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 27 [2023-11-23 07:36:50,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:50,422 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 07:36:50,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2023-11-23 07:36:50,487 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 84 treesize of output 68 [2023-11-23 07:36:50,495 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-23 07:36:50,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 104 [2023-11-23 07:36:50,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 36 [2023-11-23 07:36:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 157 proven. 21 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2023-11-23 07:36:51,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:52,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309301004] [2023-11-23 07:36:52,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:52,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555759667] [2023-11-23 07:36:52,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555759667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:36:52,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:36:52,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-23 07:36:52,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935168432] [2023-11-23 07:36:52,102 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:52,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 07:36:52,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:52,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 07:36:52,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2023-11-23 07:36:52,103 INFO L87 Difference]: Start difference. First operand 325 states and 430 transitions. Second operand has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 15 states have internal predecessors, (57), 7 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:36:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:58,128 INFO L93 Difference]: Finished difference Result 526 states and 715 transitions. [2023-11-23 07:36:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 07:36:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 15 states have internal predecessors, (57), 7 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 163 [2023-11-23 07:36:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:58,130 INFO L225 Difference]: With dead ends: 526 [2023-11-23 07:36:58,130 INFO L226 Difference]: Without dead ends: 430 [2023-11-23 07:36:58,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 149 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 07:36:58,131 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 261 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:58,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 1500 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1839 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-23 07:36:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-11-23 07:36:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 419. [2023-11-23 07:36:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 268 states have (on average 1.257462686567164) internal successors, (337), 277 states have internal predecessors, (337), 109 states have call successors, (109), 40 states have call predecessors, (109), 41 states have return successors, (116), 101 states have call predecessors, (116), 103 states have call successors, (116) [2023-11-23 07:36:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 562 transitions. [2023-11-23 07:36:58,153 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 562 transitions. Word has length 163 [2023-11-23 07:36:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:58,153 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 562 transitions. [2023-11-23 07:36:58,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 15 states have internal predecessors, (57), 7 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:36:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 562 transitions. [2023-11-23 07:36:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-23 07:36:58,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:58,154 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 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] [2023-11-23 07:36:58,176 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 07:36:58,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 07:36:58,368 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:58,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:58,369 INFO L85 PathProgramCache]: Analyzing trace with hash -864214144, now seen corresponding path program 1 times [2023-11-23 07:36:58,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:58,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512073945] [2023-11-23 07:36:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:58,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:58,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:58,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077054603] [2023-11-23 07:36:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:58,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:58,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:58,476 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 07:36:58,481 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 07:36:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:59,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-23 07:36:59,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:59,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 07:36:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:59,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2023-11-23 07:36:59,408 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 121 treesize of output 101 [2023-11-23 07:36:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:59,418 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:36:59,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:36:59,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:36:59,660 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 121 treesize of output 101 [2023-11-23 07:36:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:59,671 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:36:59,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:36:59,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:59,757 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:36:59,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 101 [2023-11-23 07:36:59,910 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 121 treesize of output 101 [2023-11-23 07:36:59,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:59,920 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:36:59,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:36:59,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 07:37:00,169 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 121 treesize of output 101 [2023-11-23 07:37:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:00,182 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:37:00,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:37:00,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:37:00,559 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 121 treesize of output 101 [2023-11-23 07:37:00,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:00,569 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:37:00,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:37:00,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:37:00,892 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 121 treesize of output 101 [2023-11-23 07:37:00,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:00,907 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:37:00,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:37:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,038 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:37:01,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 41 [2023-11-23 07:37:01,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,079 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:37:01,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 47 [2023-11-23 07:37:01,160 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 121 treesize of output 101 [2023-11-23 07:37:01,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,170 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:37:01,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:37:01,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:37:01,547 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 121 treesize of output 101 [2023-11-23 07:37:01,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,558 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:37:01,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:37:01,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,706 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:37:01,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 36 [2023-11-23 07:37:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:01,753 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-23 07:37:01,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 40 [2023-11-23 07:37:01,865 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 121 treesize of output 101 [2023-11-23 07:37:01,894 INFO L349 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2023-11-23 07:37:01,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 136 [2023-11-23 07:37:01,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 07:37:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 146 proven. 54 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2023-11-23 07:37:04,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:37:05,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:37:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512073945] [2023-11-23 07:37:05,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:37:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077054603] [2023-11-23 07:37:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077054603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:37:05,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:37:05,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-23 07:37:05,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106739361] [2023-11-23 07:37:05,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:37:05,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 07:37:05,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:37:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 07:37:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2023-11-23 07:37:05,423 INFO L87 Difference]: Start difference. First operand 419 states and 562 transitions. Second operand has 21 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-23 07:37:10,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:13,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:24,270 WARN L539 Checker$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 07:37:26,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:37:32,567 INFO L93 Difference]: Finished difference Result 535 states and 736 transitions. [2023-11-23 07:37:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 07:37:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) Word has length 165 [2023-11-23 07:37:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:37:32,569 INFO L225 Difference]: With dead ends: 535 [2023-11-23 07:37:32,569 INFO L226 Difference]: Without dead ends: 435 [2023-11-23 07:37:32,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 07:37:32,570 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 378 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 250 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:37:32,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1977 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2649 Invalid, 8 Unknown, 0 Unchecked, 24.7s Time] [2023-11-23 07:37:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-23 07:37:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 425. [2023-11-23 07:37:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 273 states have (on average 1.26007326007326) internal successors, (344), 282 states have internal predecessors, (344), 109 states have call successors, (109), 41 states have call predecessors, (109), 42 states have return successors, (116), 101 states have call predecessors, (116), 103 states have call successors, (116) [2023-11-23 07:37:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 569 transitions. [2023-11-23 07:37:32,610 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 569 transitions. Word has length 165 [2023-11-23 07:37:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:37:32,610 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 569 transitions. [2023-11-23 07:37:32,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 9 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-23 07:37:32,610 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 569 transitions. [2023-11-23 07:37:32,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 07:37:32,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:37:32,611 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:37:32,631 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 07:37:32,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:37:32,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:37:32,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:37:32,831 INFO L85 PathProgramCache]: Analyzing trace with hash -957315193, now seen corresponding path program 2 times [2023-11-23 07:37:32,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:37:32,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885316126] [2023-11-23 07:37:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:37:32,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:37:32,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:37:32,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854483109] [2023-11-23 07:37:32,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:37:32,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:37:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:37:32,923 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 07:37:32,964 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 07:37:33,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:37:33,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:37:33,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-23 07:37:33,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:37:34,027 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 19 treesize of output 1 [2023-11-23 07:37:34,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 35 [2023-11-23 07:37:34,131 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 125 treesize of output 105 [2023-11-23 07:37:34,142 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-23 07:37:34,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 138 [2023-11-23 07:37:34,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:34,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:34,261 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-23 07:37:34,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 43 [2023-11-23 07:37:34,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:34,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:34,306 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-23 07:37:34,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 49 [2023-11-23 07:37:34,385 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 125 treesize of output 105 [2023-11-23 07:37:34,396 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-23 07:37:34,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 138 [2023-11-23 07:37:34,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 36 [2023-11-23 07:37:34,653 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 125 treesize of output 105 [2023-11-23 07:37:34,664 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-23 07:37:34,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 138 [2023-11-23 07:37:34,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 07:37:34,891 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 125 treesize of output 105 [2023-11-23 07:37:34,903 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-23 07:37:34,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 138 [2023-11-23 07:37:34,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:37:35,169 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 125 treesize of output 105 [2023-11-23 07:37:35,188 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-23 07:37:35,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 138 [2023-11-23 07:37:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,300 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-23 07:37:35,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 43 [2023-11-23 07:37:35,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,351 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-23 07:37:35,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 49 [2023-11-23 07:37:35,431 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 125 treesize of output 105 [2023-11-23 07:37:35,451 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-23 07:37:35,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 138 [2023-11-23 07:37:35,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,618 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-23 07:37:35,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 49 [2023-11-23 07:37:35,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,652 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-23 07:37:35,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 43 [2023-11-23 07:37:35,736 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 125 treesize of output 105 [2023-11-23 07:37:35,753 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-23 07:37:35,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 138 [2023-11-23 07:37:35,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,878 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-23 07:37:35,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 43 [2023-11-23 07:37:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:37:35,925 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-23 07:37:35,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 49 [2023-11-23 07:37:35,992 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 125 treesize of output 105 [2023-11-23 07:37:36,016 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-23 07:37:36,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 138 [2023-11-23 07:37:36,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 8 [2023-11-23 07:37:39,190 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base_BEFORE_CALL_14| Int) (v_z_171 Int)) (and (<= v_z_171 9223372036854775807) (<= 0 v_z_171) (exists ((v_DerPreprocessor_69 Int)) (let ((.cse3 (select |c_#memory_int#1| |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base_BEFORE_CALL_14|)) (.cse4 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| v_z_171))) (let ((.cse2 (select .cse3 .cse4))) (let ((.cse1 (store (store .cse3 .cse4 v_DerPreprocessor_69) (+ (- 18446744073709551616) |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| v_z_171) .cse2))) (let ((.cse0 (select .cse1 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| 2)))) (and (<= 0 .cse0) (= .cse0 (select .cse1 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| 1))) (<= .cse0 127) (= .cse2 .cse0))))))))) (exists ((|v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base_BEFORE_CALL_14| Int)) (let ((.cse6 (select |c_#memory_int#1| |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base_BEFORE_CALL_14|))) (let ((.cse5 (select .cse6 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| 2)))) (and (<= 0 .cse5) (= (select .cse6 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| 1)) .cse5) (exists ((v_z_171 Int)) (and (<= 9223372036854775808 v_z_171) (<= v_z_171 18446744073709551615) (= (select .cse6 (+ (- 18446744073709551616) |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| v_z_171)) .cse5))) (<= .cse5 127))))) (exists ((|v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base_BEFORE_CALL_14| Int) (v_z_171 Int)) (and (<= v_z_171 9223372036854775807) (<= 0 v_z_171) (exists ((v_DerPreprocessor_69 Int)) (let ((.cse10 (select |c_#memory_int#1| |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base_BEFORE_CALL_14|)) (.cse11 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| v_z_171))) (let ((.cse9 (select .cse10 .cse11))) (let ((.cse8 (store (store .cse10 .cse11 v_DerPreprocessor_69) (+ (- 18446744073709551616) |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| v_z_171) .cse9))) (let ((.cse7 (select .cse8 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| 2)))) (and (<= (+ .cse7 1) 0) (= .cse7 (select .cse8 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| 1))) (<= 0 (+ .cse7 128)) (= .cse9 .cse7))))))))) (exists ((|v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base_BEFORE_CALL_14| Int)) (let ((.cse13 (select |c_#memory_int#1| |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.base_BEFORE_CALL_14|))) (let ((.cse12 (select .cse13 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| 2)))) (and (<= 0 (+ .cse12 128)) (= (select .cse13 (+ |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| 1)) .cse12) (exists ((v_z_171 Int)) (and (<= 9223372036854775808 v_z_171) (<= v_z_171 18446744073709551615) (= (select .cse13 (+ (- 18446744073709551616) |v_ULTIMATE.start_aws_array_list_init_dynamic_~list#1.offset_BEFORE_CALL_18| v_z_171)) .cse12))) (<= (+ .cse12 1) 0)))))) is different from true [2023-11-23 07:37:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 135 proven. 87 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-11-23 07:37:42,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:37:46,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:37:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885316126] [2023-11-23 07:37:46,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:37:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854483109] [2023-11-23 07:37:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854483109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:37:46,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:37:46,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-23 07:37:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293686696] [2023-11-23 07:37:46,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:37:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 07:37:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:37:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 07:37:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=679, Unknown=3, NotChecked=52, Total=812 [2023-11-23 07:37:46,975 INFO L87 Difference]: Start difference. First operand 425 states and 569 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 6 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-23 07:38:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:38:02,021 INFO L93 Difference]: Finished difference Result 549 states and 742 transitions. [2023-11-23 07:38:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 07:38:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 6 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) Word has length 167 [2023-11-23 07:38:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:38:02,024 INFO L225 Difference]: With dead ends: 549 [2023-11-23 07:38:02,024 INFO L226 Difference]: Without dead ends: 441 [2023-11-23 07:38:02,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=177, Invalid=1629, Unknown=4, NotChecked=82, Total=1892 [2023-11-23 07:38:02,025 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 132 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 2247 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:38:02,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 2000 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2247 Invalid, 0 Unknown, 271 Unchecked, 7.4s Time] [2023-11-23 07:38:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-23 07:38:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 435. [2023-11-23 07:38:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 282 states have (on average 1.2624113475177305) internal successors, (356), 291 states have internal predecessors, (356), 109 states have call successors, (109), 42 states have call predecessors, (109), 43 states have return successors, (117), 101 states have call predecessors, (117), 103 states have call successors, (117) [2023-11-23 07:38:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 582 transitions. [2023-11-23 07:38:02,075 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 582 transitions. Word has length 167 [2023-11-23 07:38:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:38:02,075 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 582 transitions. [2023-11-23 07:38:02,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 6 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-23 07:38:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 582 transitions. [2023-11-23 07:38:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-23 07:38:02,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:38:02,077 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 4, 3, 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] [2023-11-23 07:38:02,114 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 07:38:02,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:02,292 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:38:02,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:38:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash -233110066, now seen corresponding path program 3 times [2023-11-23 07:38:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:38:02,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95744130] [2023-11-23 07:38:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:38:02,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:38:02,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:38:02,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834011533] [2023-11-23 07:38:02,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:38:02,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:38:02,375 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 07:38:02,377 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 07:38:11,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 07:38:11,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:38:11,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-23 07:38:11,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:38:11,458 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 19 treesize of output 1 [2023-11-23 07:38:11,502 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 88 treesize of output 72 [2023-11-23 07:38:11,509 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-23 07:38:11,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 106 [2023-11-23 07:38:11,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:38:11,707 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 88 treesize of output 72 [2023-11-23 07:38:11,715 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-23 07:38:11,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 106 [2023-11-23 07:38:11,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:11,800 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-23 07:38:11,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 29 [2023-11-23 07:38:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:11,839 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-23 07:38:11,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 33 [2023-11-23 07:38:11,903 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 88 treesize of output 72 [2023-11-23 07:38:11,914 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-23 07:38:11,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 106 [2023-11-23 07:38:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:11,974 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-23 07:38:11,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 69 [2023-11-23 07:38:12,136 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 88 treesize of output 72 [2023-11-23 07:38:12,145 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-23 07:38:12,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 106 [2023-11-23 07:38:12,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:12,264 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-23 07:38:12,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 24 [2023-11-23 07:38:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:12,301 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-23 07:38:12,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 26 [2023-11-23 07:38:12,387 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 88 treesize of output 72 [2023-11-23 07:38:12,394 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-23 07:38:12,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 106 [2023-11-23 07:38:12,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 36 [2023-11-23 07:38:12,655 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 88 treesize of output 72 [2023-11-23 07:38:12,665 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-23 07:38:12,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 106 [2023-11-23 07:38:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:12,713 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-23 07:38:12,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 69 [2023-11-23 07:38:12,862 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 88 treesize of output 72 [2023-11-23 07:38:12,869 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-23 07:38:12,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 106 [2023-11-23 07:38:12,961 INFO L349 Elim1Store]: treesize reduction 60, result has 13.0 percent of original size [2023-11-23 07:38:12,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 29 [2023-11-23 07:38:12,992 INFO L349 Elim1Store]: treesize reduction 60, result has 13.0 percent of original size [2023-11-23 07:38:12,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 33 [2023-11-23 07:38:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 157 proven. 57 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-11-23 07:38:14,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:38:15,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:38:15,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95744130] [2023-11-23 07:38:15,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:38:15,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834011533] [2023-11-23 07:38:15,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834011533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:38:15,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:38:15,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-23 07:38:15,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507075982] [2023-11-23 07:38:15,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:38:15,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 07:38:15,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:38:15,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 07:38:15,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 07:38:15,239 INFO L87 Difference]: Start difference. First operand 435 states and 582 transitions. Second operand has 22 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 7 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:38:21,270 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 07:38:28,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:30,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:32,771 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 07:38:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:38:34,812 INFO L93 Difference]: Finished difference Result 746 states and 1049 transitions. [2023-11-23 07:38:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 07:38:34,813 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 7 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 169 [2023-11-23 07:38:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:38:34,830 INFO L225 Difference]: With dead ends: 746 [2023-11-23 07:38:34,830 INFO L226 Difference]: Without dead ends: 644 [2023-11-23 07:38:34,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=206, Invalid=2244, Unknown=0, NotChecked=0, Total=2450 [2023-11-23 07:38:34,833 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 231 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 3409 mSolverCounterSat, 96 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3409 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:38:34,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 2341 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3409 Invalid, 19 Unknown, 0 Unchecked, 18.6s Time] [2023-11-23 07:38:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2023-11-23 07:38:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 553. [2023-11-23 07:38:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 356 states have (on average 1.2752808988764044) internal successors, (454), 376 states have internal predecessors, (454), 133 states have call successors, (133), 62 states have call predecessors, (133), 63 states have return successors, (147), 114 states have call predecessors, (147), 124 states have call successors, (147) [2023-11-23 07:38:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 734 transitions. [2023-11-23 07:38:34,902 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 734 transitions. Word has length 169 [2023-11-23 07:38:34,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:38:34,902 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 734 transitions. [2023-11-23 07:38:34,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 7 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:38:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 734 transitions. [2023-11-23 07:38:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 07:38:34,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:38:34,904 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:38:34,924 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 07:38:35,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:35,121 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:38:35,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:38:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash 686739507, now seen corresponding path program 1 times [2023-11-23 07:38:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:38:35,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654602531] [2023-11-23 07:38:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:38:35,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:38:35,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:38:35,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020194700] [2023-11-23 07:38:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:38:35,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:35,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:38:35,187 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 07:38:35,232 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 07:38:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:38:35,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 3121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:38:35,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:38:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2023-11-23 07:38:36,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:38:36,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:38:36,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654602531] [2023-11-23 07:38:36,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:38:36,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020194700] [2023-11-23 07:38:36,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020194700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:38:36,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:38:36,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 07:38:36,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344731341] [2023-11-23 07:38:36,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:38:36,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 07:38:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:38:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 07:38:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:38:36,035 INFO L87 Difference]: Start difference. First operand 553 states and 734 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-11-23 07:38:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:38:36,460 INFO L93 Difference]: Finished difference Result 807 states and 1079 transitions. [2023-11-23 07:38:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:38:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 170 [2023-11-23 07:38:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:38:36,464 INFO L225 Difference]: With dead ends: 807 [2023-11-23 07:38:36,464 INFO L226 Difference]: Without dead ends: 559 [2023-11-23 07:38:36,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:38:36,465 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 105 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:38:36,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1061 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:38:36,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-11-23 07:38:36,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2023-11-23 07:38:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 359 states have (on average 1.2729805013927578) internal successors, (457), 382 states have internal predecessors, (457), 133 states have call successors, (133), 62 states have call predecessors, (133), 66 states have return successors, (151), 114 states have call predecessors, (151), 124 states have call successors, (151) [2023-11-23 07:38:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 741 transitions. [2023-11-23 07:38:36,531 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 741 transitions. Word has length 170 [2023-11-23 07:38:36,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:38:36,532 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 741 transitions. [2023-11-23 07:38:36,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-11-23 07:38:36,532 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 741 transitions. [2023-11-23 07:38:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-23 07:38:36,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:38:36,533 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 5, 4, 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] [2023-11-23 07:38:36,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-23 07:38:36,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:36,750 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:38:36,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:38:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash -56684971, now seen corresponding path program 4 times [2023-11-23 07:38:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:38:36,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100167410] [2023-11-23 07:38:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:38:36,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:38:36,820 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:38:36,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476404898] [2023-11-23 07:38:36,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:38:36,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:38:36,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:38:36,837 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 07:38:36,851 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 07:38:37,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:38:37,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:38:37,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 3050 conjuncts, 112 conjunts are in the unsatisfiable core [2023-11-23 07:38:37,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:38:37,810 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 19 treesize of output 1 [2023-11-23 07:38:37,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 35 [2023-11-23 07:38:37,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 69 [2023-11-23 07:38:38,023 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 162 treesize of output 138 [2023-11-23 07:38:38,036 INFO L349 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2023-11-23 07:38:38,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 170 [2023-11-23 07:38:38,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 10 [2023-11-23 07:38:38,304 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 162 treesize of output 138 [2023-11-23 07:38:38,322 INFO L349 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2023-11-23 07:38:38,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 170 [2023-11-23 07:38:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:38,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:38,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:38,384 INFO L349 Elim1Store]: treesize reduction 72, result has 28.0 percent of original size [2023-11-23 07:38:38,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 137 [2023-11-23 07:38:38,616 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 162 treesize of output 138 [2023-11-23 07:38:38,627 INFO L349 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2023-11-23 07:38:38,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 170 [2023-11-23 07:38:38,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 36 [2023-11-23 07:38:38,936 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 162 treesize of output 138 [2023-11-23 07:38:38,948 INFO L349 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2023-11-23 07:38:38,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 170 [2023-11-23 07:38:38,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2023-11-23 07:38:39,277 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 162 treesize of output 138 [2023-11-23 07:38:39,290 INFO L349 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2023-11-23 07:38:39,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 170 [2023-11-23 07:38:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,412 INFO L349 Elim1Store]: treesize reduction 72, result has 28.0 percent of original size [2023-11-23 07:38:39,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 57 [2023-11-23 07:38:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,455 INFO L349 Elim1Store]: treesize reduction 72, result has 28.0 percent of original size [2023-11-23 07:38:39,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 65 [2023-11-23 07:38:39,576 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 162 treesize of output 138 [2023-11-23 07:38:39,587 INFO L349 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2023-11-23 07:38:39,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 170 [2023-11-23 07:38:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:38:39,699 INFO L349 Elim1Store]: treesize reduction 72, result has 28.0 percent of original size [2023-11-23 07:38:39,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 112 [2023-11-23 07:38:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 135 proven. 114 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-23 07:38:43,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:38:48,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:38:48,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100167410] [2023-11-23 07:38:48,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:38:48,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476404898] [2023-11-23 07:38:48,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476404898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:38:48,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:38:48,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-11-23 07:38:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667884326] [2023-11-23 07:38:48,535 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:38:48,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 07:38:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:38:48,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 07:38:48,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1292, Unknown=2, NotChecked=0, Total=1406 [2023-11-23 07:38:48,538 INFO L87 Difference]: Start difference. First operand 559 states and 741 transitions. Second operand has 28 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 9 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-23 07:38:52,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:55,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:57,845 WARN L539 Checker$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 07:39:04,422 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] Killed by 15