./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c4f91361 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test3-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb5220aa49e6d5ce07adbf2b5e67e7c8f277342987ef62ca05a827d2ae217f75 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 14:35:38,356 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 14:35:38,422 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 14:35:38,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 14:35:38,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 14:35:38,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 14:35:38,447 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 14:35:38,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 14:35:38,448 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 14:35:38,451 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 14:35:38,451 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 14:35:38,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 14:35:38,452 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 14:35:38,453 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 14:35:38,453 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 14:35:38,453 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 14:35:38,454 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 14:35:38,454 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 14:35:38,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 14:35:38,454 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 14:35:38,454 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 14:35:38,455 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 14:35:38,455 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 14:35:38,455 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 14:35:38,455 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 14:35:38,456 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 14:35:38,456 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 14:35:38,456 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 14:35:38,457 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 14:35:38,457 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 14:35:38,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 14:35:38,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:35:38,458 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 14:35:38,458 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 14:35:38,458 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 14:35:38,458 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 14:35:38,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 14:35:38,459 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 14:35:38,459 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 14:35:38,459 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 14:35:38,459 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 14:35:38,460 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 14:35:38,460 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb5220aa49e6d5ce07adbf2b5e67e7c8f277342987ef62ca05a827d2ae217f75 [2023-11-23 14:35:38,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 14:35:38,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 14:35:38,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 14:35:38,683 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 14:35:38,683 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 14:35:38,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test3-2.i [2023-11-23 14:35:39,705 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 14:35:39,961 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 14:35:39,962 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test3-2.i [2023-11-23 14:35:39,976 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe149d41/8e07f65d7a404c63a2badffa96588d30/FLAGd7bd531a6 [2023-11-23 14:35:39,986 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe149d41/8e07f65d7a404c63a2badffa96588d30 [2023-11-23 14:35:39,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 14:35:39,989 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 14:35:39,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 14:35:39,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 14:35:39,993 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 14:35:39,994 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:39" (1/1) ... [2023-11-23 14:35:39,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2198621c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:39, skipping insertion in model container [2023-11-23 14:35:39,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:39" (1/1) ... [2023-11-23 14:35:40,078 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 14:35:40,363 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test3-2.i[33510,33523] [2023-11-23 14:35:40,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:35:40,475 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 14:35:40,494 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test3-2.i[33510,33523] [2023-11-23 14:35:40,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:35:40,574 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 14:35:40,580 INFO L206 MainTranslator]: Completed translation [2023-11-23 14:35:40,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40 WrapperNode [2023-11-23 14:35:40,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 14:35:40,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 14:35:40,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 14:35:40,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 14:35:40,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,669 INFO L138 Inliner]: procedures = 177, calls = 332, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1502 [2023-11-23 14:35:40,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 14:35:40,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 14:35:40,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 14:35:40,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 14:35:40,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,708 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,800 INFO L175 MemorySlicer]: Split 307 memory accesses to 5 slices as follows [2, 5, 266, 0, 34]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 63 writes are split as follows [0, 1, 58, 0, 4]. [2023-11-23 14:35:40,801 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,801 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 14:35:40,855 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 14:35:40,855 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 14:35:40,855 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 14:35:40,855 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (1/1) ... [2023-11-23 14:35:40,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:35:40,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:40,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 14:35:40,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 14:35:40,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 14:35:40,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 14:35:40,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 14:35:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 14:35:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 14:35:40,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 14:35:40,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 14:35:40,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 14:35:40,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 14:35:40,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 14:35:40,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 14:35:40,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 14:35:40,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-23 14:35:40,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-23 14:35:40,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-23 14:35:40,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-23 14:35:40,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-23 14:35:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-23 14:35:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-23 14:35:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-23 14:35:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-23 14:35:40,949 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-23 14:35:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 14:35:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 14:35:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 14:35:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 14:35:40,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 14:35:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 14:35:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 14:35:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 14:35:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 14:35:40,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 14:35:40,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 14:35:40,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 14:35:40,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 14:35:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 14:35:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 14:35:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 14:35:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 14:35:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 14:35:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 14:35:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 14:35:40,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 14:35:40,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 14:35:41,166 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 14:35:41,168 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 14:35:42,273 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 14:35:42,303 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 14:35:42,304 INFO L309 CfgBuilder]: Removed 72 assume(true) statements. [2023-11-23 14:35:42,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:42 BoogieIcfgContainer [2023-11-23 14:35:42,304 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 14:35:42,307 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 14:35:42,307 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 14:35:42,309 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 14:35:42,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:35:39" (1/3) ... [2023-11-23 14:35:42,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61430406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:42, skipping insertion in model container [2023-11-23 14:35:42,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:40" (2/3) ... [2023-11-23 14:35:42,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61430406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:42, skipping insertion in model container [2023-11-23 14:35:42,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:42" (3/3) ... [2023-11-23 14:35:42,313 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_nondet_test3-2.i [2023-11-23 14:35:42,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 14:35:42,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 14:35:42,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 14:35:42,385 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;@a9b172f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 14:35:42,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 14:35:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 380 states have (on average 1.7) internal successors, (646), 382 states have internal predecessors, (646), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 14:35:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 14:35:42,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:42,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:42,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:42,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1354747985, now seen corresponding path program 1 times [2023-11-23 14:35:42,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:42,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473843468] [2023-11-23 14:35:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:42,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:35:42,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:42,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473843468] [2023-11-23 14:35:42,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473843468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:42,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:42,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 14:35:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352770108] [2023-11-23 14:35:42,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:42,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 14:35:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 14:35:42,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 14:35:42,712 INFO L87 Difference]: Start difference. First operand has 389 states, 380 states have (on average 1.7) internal successors, (646), 382 states have internal predecessors, (646), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:35:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:42,786 INFO L93 Difference]: Finished difference Result 776 states and 1311 transitions. [2023-11-23 14:35:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 14:35:42,788 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-23 14:35:42,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:42,801 INFO L225 Difference]: With dead ends: 776 [2023-11-23 14:35:42,801 INFO L226 Difference]: Without dead ends: 353 [2023-11-23 14:35:42,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 14:35:42,811 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:42,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 574 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:35:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-23 14:35:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2023-11-23 14:35:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 345 states have (on average 1.5043478260869565) internal successors, (519), 346 states have internal predecessors, (519), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 14:35:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 529 transitions. [2023-11-23 14:35:42,864 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 529 transitions. Word has length 11 [2023-11-23 14:35:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:42,864 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 529 transitions. [2023-11-23 14:35:42,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:35:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 529 transitions. [2023-11-23 14:35:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 14:35:42,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:42,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:42,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 14:35:42,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:42,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash 647975692, now seen corresponding path program 1 times [2023-11-23 14:35:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:42,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691212168] [2023-11-23 14:35:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:42,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:35:43,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691212168] [2023-11-23 14:35:43,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691212168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:43,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:43,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 14:35:43,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895183669] [2023-11-23 14:35:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:35:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:35:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:35:43,027 INFO L87 Difference]: Start difference. First operand 353 states and 529 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:35:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:43,206 INFO L93 Difference]: Finished difference Result 963 states and 1463 transitions. [2023-11-23 14:35:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:35:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 14:35:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:43,209 INFO L225 Difference]: With dead ends: 963 [2023-11-23 14:35:43,209 INFO L226 Difference]: Without dead ends: 610 [2023-11-23 14:35:43,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:35:43,211 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 401 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:43,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1493 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:35:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-11-23 14:35:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 609. [2023-11-23 14:35:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 600 states have (on average 1.53) internal successors, (918), 602 states have internal predecessors, (918), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 930 transitions. [2023-11-23 14:35:43,236 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 930 transitions. Word has length 13 [2023-11-23 14:35:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:43,236 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 930 transitions. [2023-11-23 14:35:43,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:35:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 930 transitions. [2023-11-23 14:35:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 14:35:43,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:43,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:43,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 14:35:43,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:43,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:43,239 INFO L85 PathProgramCache]: Analyzing trace with hash 779869298, now seen corresponding path program 1 times [2023-11-23 14:35:43,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:43,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998012167] [2023-11-23 14:35:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:43,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:35:43,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:43,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998012167] [2023-11-23 14:35:43,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998012167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:43,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:43,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 14:35:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701132009] [2023-11-23 14:35:43,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:43,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:35:43,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:35:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:35:43,506 INFO L87 Difference]: Start difference. First operand 609 states and 930 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:35:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:43,612 INFO L93 Difference]: Finished difference Result 861 states and 1300 transitions. [2023-11-23 14:35:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:35:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-23 14:35:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:43,616 INFO L225 Difference]: With dead ends: 861 [2023-11-23 14:35:43,616 INFO L226 Difference]: Without dead ends: 545 [2023-11-23 14:35:43,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:35:43,627 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 99 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:43,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1215 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:35:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-11-23 14:35:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 543. [2023-11-23 14:35:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 534 states have (on average 1.4644194756554307) internal successors, (782), 536 states have internal predecessors, (782), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 794 transitions. [2023-11-23 14:35:43,653 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 794 transitions. Word has length 67 [2023-11-23 14:35:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:43,653 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 794 transitions. [2023-11-23 14:35:43,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:35:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 794 transitions. [2023-11-23 14:35:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 14:35:43,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:43,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:43,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 14:35:43,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:43,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash -684031106, now seen corresponding path program 1 times [2023-11-23 14:35:43,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:43,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355487877] [2023-11-23 14:35:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:35:44,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:44,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355487877] [2023-11-23 14:35:44,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355487877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:44,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:44,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 14:35:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539295721] [2023-11-23 14:35:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:44,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 14:35:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 14:35:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:35:44,048 INFO L87 Difference]: Start difference. First operand 543 states and 794 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:35:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:44,164 INFO L93 Difference]: Finished difference Result 1019 states and 1452 transitions. [2023-11-23 14:35:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 14:35:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-23 14:35:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:44,167 INFO L225 Difference]: With dead ends: 1019 [2023-11-23 14:35:44,167 INFO L226 Difference]: Without dead ends: 766 [2023-11-23 14:35:44,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 14:35:44,176 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 431 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:44,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 2346 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:35:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2023-11-23 14:35:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 542. [2023-11-23 14:35:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 533 states have (on average 1.4634146341463414) internal successors, (780), 535 states have internal predecessors, (780), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 792 transitions. [2023-11-23 14:35:44,194 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 792 transitions. Word has length 67 [2023-11-23 14:35:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:44,194 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 792 transitions. [2023-11-23 14:35:44,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:35:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 792 transitions. [2023-11-23 14:35:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 14:35:44,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:44,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:44,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 14:35:44,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:44,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash 933822603, now seen corresponding path program 1 times [2023-11-23 14:35:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:44,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027029964] [2023-11-23 14:35:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:44,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:44,252 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:44,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695667802] [2023-11-23 14:35:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:44,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:44,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:44,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:44,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 14:35:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:44,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 14:35:44,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:44,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:44,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:44,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027029964] [2023-11-23 14:35:44,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:44,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695667802] [2023-11-23 14:35:44,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695667802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:44,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:44,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 14:35:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730789249] [2023-11-23 14:35:44,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:44,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:35:44,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:44,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:35:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:35:44,594 INFO L87 Difference]: Start difference. First operand 542 states and 792 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:44,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:44,665 INFO L93 Difference]: Finished difference Result 1073 states and 1563 transitions. [2023-11-23 14:35:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:35:44,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 102 [2023-11-23 14:35:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:44,667 INFO L225 Difference]: With dead ends: 1073 [2023-11-23 14:35:44,672 INFO L226 Difference]: Without dead ends: 584 [2023-11-23 14:35:44,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:35:44,673 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 9 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:44,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 850 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:35:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-23 14:35:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2023-11-23 14:35:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 573 states have (on average 1.431064572425829) internal successors, (820), 575 states have internal predecessors, (820), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 832 transitions. [2023-11-23 14:35:44,687 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 832 transitions. Word has length 102 [2023-11-23 14:35:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:44,688 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 832 transitions. [2023-11-23 14:35:44,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 832 transitions. [2023-11-23 14:35:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 14:35:44,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:44,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:44,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:44,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:44,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash -863825913, now seen corresponding path program 1 times [2023-11-23 14:35:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:44,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825447326] [2023-11-23 14:35:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:44,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:44,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:44,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142732756] [2023-11-23 14:35:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:44,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:44,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:44,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 14:35:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:45,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 14:35:45,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:45,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:45,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:45,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825447326] [2023-11-23 14:35:45,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:45,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142732756] [2023-11-23 14:35:45,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142732756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:45,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:45,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 14:35:45,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632803618] [2023-11-23 14:35:45,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:45,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:35:45,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:35:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:35:45,233 INFO L87 Difference]: Start difference. First operand 582 states and 832 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:45,284 INFO L93 Difference]: Finished difference Result 1067 states and 1528 transitions. [2023-11-23 14:35:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:35:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 102 [2023-11-23 14:35:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:45,286 INFO L225 Difference]: With dead ends: 1067 [2023-11-23 14:35:45,286 INFO L226 Difference]: Without dead ends: 556 [2023-11-23 14:35:45,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:35:45,287 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 165 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:45,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1123 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:35:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-23 14:35:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 554. [2023-11-23 14:35:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 545 states have (on average 1.4275229357798165) internal successors, (778), 547 states have internal predecessors, (778), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 790 transitions. [2023-11-23 14:35:45,297 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 790 transitions. Word has length 102 [2023-11-23 14:35:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:45,297 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 790 transitions. [2023-11-23 14:35:45,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 790 transitions. [2023-11-23 14:35:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 14:35:45,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:45,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:45,313 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 14:35:45,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 14:35:45,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:45,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1777677035, now seen corresponding path program 1 times [2023-11-23 14:35:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:45,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430432585] [2023-11-23 14:35:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:45,548 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:45,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352642309] [2023-11-23 14:35:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:45,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:45,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:45,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 14:35:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:45,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 14:35:45,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:45,882 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 11 treesize of output 7 [2023-11-23 14:35:45,893 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 16 treesize of output 17 [2023-11-23 14:35:46,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:35:46,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 26 [2023-11-23 14:35:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:46,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:46,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:46,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430432585] [2023-11-23 14:35:46,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:46,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352642309] [2023-11-23 14:35:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352642309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:46,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:46,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 14:35:46,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792705799] [2023-11-23 14:35:46,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:46,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 14:35:46,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 14:35:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 14:35:46,302 INFO L87 Difference]: Start difference. First operand 554 states and 790 transitions. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:47,264 INFO L93 Difference]: Finished difference Result 1291 states and 1822 transitions. [2023-11-23 14:35:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 14:35:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 102 [2023-11-23 14:35:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:47,267 INFO L225 Difference]: With dead ends: 1291 [2023-11-23 14:35:47,267 INFO L226 Difference]: Without dead ends: 819 [2023-11-23 14:35:47,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-23 14:35:47,269 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 683 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:47,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 2418 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 14:35:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2023-11-23 14:35:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 586. [2023-11-23 14:35:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 577 states have (on average 1.4124783362218372) internal successors, (815), 579 states have internal predecessors, (815), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 827 transitions. [2023-11-23 14:35:47,286 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 827 transitions. Word has length 102 [2023-11-23 14:35:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:47,287 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 827 transitions. [2023-11-23 14:35:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 827 transitions. [2023-11-23 14:35:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 14:35:47,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:47,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:47,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:47,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:47,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:47,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1750611433, now seen corresponding path program 1 times [2023-11-23 14:35:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:47,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015814090] [2023-11-23 14:35:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:47,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:47,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:47,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786565591] [2023-11-23 14:35:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:47,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:47,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:47,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 14:35:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:47,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 14:35:47,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:47,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:47,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015814090] [2023-11-23 14:35:47,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786565591] [2023-11-23 14:35:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786565591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:47,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:47,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 14:35:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325967164] [2023-11-23 14:35:47,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 14:35:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:47,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 14:35:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:35:47,855 INFO L87 Difference]: Start difference. First operand 586 states and 827 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:47,933 INFO L93 Difference]: Finished difference Result 1258 states and 1815 transitions. [2023-11-23 14:35:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 14:35:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 102 [2023-11-23 14:35:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:47,936 INFO L225 Difference]: With dead ends: 1258 [2023-11-23 14:35:47,936 INFO L226 Difference]: Without dead ends: 774 [2023-11-23 14:35:47,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:35:47,937 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 145 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:47,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1406 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:35:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-11-23 14:35:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 609. [2023-11-23 14:35:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 600 states have (on average 1.395) internal successors, (837), 602 states have internal predecessors, (837), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:47,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 849 transitions. [2023-11-23 14:35:47,951 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 849 transitions. Word has length 102 [2023-11-23 14:35:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:47,951 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 849 transitions. [2023-11-23 14:35:47,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 849 transitions. [2023-11-23 14:35:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 14:35:47,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:47,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:47,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:48,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:48,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:48,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1676672447, now seen corresponding path program 1 times [2023-11-23 14:35:48,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:48,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146028301] [2023-11-23 14:35:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:48,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:48,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:48,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459795820] [2023-11-23 14:35:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:48,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:48,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:48,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:48,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 14:35:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:48,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 14:35:48,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:48,530 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 11 treesize of output 7 [2023-11-23 14:35:48,539 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 16 treesize of output 17 [2023-11-23 14:35:48,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:35:48,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 26 [2023-11-23 14:35:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:48,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:48,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146028301] [2023-11-23 14:35:48,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459795820] [2023-11-23 14:35:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459795820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:48,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:48,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 14:35:48,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56910459] [2023-11-23 14:35:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:48,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 14:35:48,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 14:35:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 14:35:48,911 INFO L87 Difference]: Start difference. First operand 609 states and 849 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:49,486 INFO L93 Difference]: Finished difference Result 1357 states and 1897 transitions. [2023-11-23 14:35:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 14:35:49,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 103 [2023-11-23 14:35:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:49,489 INFO L225 Difference]: With dead ends: 1357 [2023-11-23 14:35:49,489 INFO L226 Difference]: Without dead ends: 866 [2023-11-23 14:35:49,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2023-11-23 14:35:49,490 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 771 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:49,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 1741 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:35:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-23 14:35:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 622. [2023-11-23 14:35:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 613 states have (on average 1.394779771615008) internal successors, (855), 615 states have internal predecessors, (855), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 867 transitions. [2023-11-23 14:35:49,502 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 867 transitions. Word has length 103 [2023-11-23 14:35:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:49,502 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 867 transitions. [2023-11-23 14:35:49,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 867 transitions. [2023-11-23 14:35:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 14:35:49,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:49,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:49,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:49,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:49,716 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:49,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:49,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1369523786, now seen corresponding path program 1 times [2023-11-23 14:35:49,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:49,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3581327] [2023-11-23 14:35:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:49,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:49,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:49,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828022763] [2023-11-23 14:35:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:49,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:49,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:49,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:49,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 14:35:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:50,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 14:35:50,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:50,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:50,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:50,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3581327] [2023-11-23 14:35:50,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:50,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828022763] [2023-11-23 14:35:50,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828022763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:50,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:50,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 14:35:50,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715789372] [2023-11-23 14:35:50,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:50,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 14:35:50,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:50,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 14:35:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:35:50,128 INFO L87 Difference]: Start difference. First operand 622 states and 867 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:50,515 INFO L93 Difference]: Finished difference Result 1149 states and 1612 transitions. [2023-11-23 14:35:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 14:35:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 104 [2023-11-23 14:35:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:50,518 INFO L225 Difference]: With dead ends: 1149 [2023-11-23 14:35:50,518 INFO L226 Difference]: Without dead ends: 646 [2023-11-23 14:35:50,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:35:50,519 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 17 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:50,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2032 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:35:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2023-11-23 14:35:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 636. [2023-11-23 14:35:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 627 states have (on average 1.3923444976076556) internal successors, (873), 629 states have internal predecessors, (873), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 885 transitions. [2023-11-23 14:35:50,531 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 885 transitions. Word has length 104 [2023-11-23 14:35:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:50,531 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 885 transitions. [2023-11-23 14:35:50,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 885 transitions. [2023-11-23 14:35:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 14:35:50,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:50,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:50,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:50,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:50,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:50,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1691836528, now seen corresponding path program 1 times [2023-11-23 14:35:50,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:50,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330739050] [2023-11-23 14:35:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:50,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:50,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:50,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810022873] [2023-11-23 14:35:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:50,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:50,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:50,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:50,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 14:35:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:51,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 14:35:51,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:51,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:51,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:51,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330739050] [2023-11-23 14:35:51,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:51,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810022873] [2023-11-23 14:35:51,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810022873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:51,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:51,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 14:35:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339670107] [2023-11-23 14:35:51,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:51,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 14:35:51,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 14:35:51,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:35:51,186 INFO L87 Difference]: Start difference. First operand 636 states and 885 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:51,420 INFO L93 Difference]: Finished difference Result 1157 states and 1617 transitions. [2023-11-23 14:35:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 14:35:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 104 [2023-11-23 14:35:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:51,422 INFO L225 Difference]: With dead ends: 1157 [2023-11-23 14:35:51,423 INFO L226 Difference]: Without dead ends: 648 [2023-11-23 14:35:51,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:35:51,424 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 10 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:51,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1459 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:35:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2023-11-23 14:35:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 644. [2023-11-23 14:35:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 635 states have (on average 1.3905511811023623) internal successors, (883), 637 states have internal predecessors, (883), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 895 transitions. [2023-11-23 14:35:51,437 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 895 transitions. Word has length 104 [2023-11-23 14:35:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:51,438 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 895 transitions. [2023-11-23 14:35:51,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 895 transitions. [2023-11-23 14:35:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 14:35:51,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:51,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:51,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:51,652 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:51,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1649190610, now seen corresponding path program 1 times [2023-11-23 14:35:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:51,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563012941] [2023-11-23 14:35:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:51,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:51,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287561472] [2023-11-23 14:35:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:51,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:51,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:51,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:51,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 14:35:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:51,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 14:35:51,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:52,097 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 11 treesize of output 7 [2023-11-23 14:35:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:52,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:52,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:52,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563012941] [2023-11-23 14:35:52,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:52,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287561472] [2023-11-23 14:35:52,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287561472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:52,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:52,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 14:35:52,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35070152] [2023-11-23 14:35:52,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:52,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 14:35:52,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:52,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 14:35:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:35:52,118 INFO L87 Difference]: Start difference. First operand 644 states and 895 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:52,191 INFO L93 Difference]: Finished difference Result 816 states and 1132 transitions. [2023-11-23 14:35:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 14:35:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 104 [2023-11-23 14:35:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:52,194 INFO L225 Difference]: With dead ends: 816 [2023-11-23 14:35:52,194 INFO L226 Difference]: Without dead ends: 806 [2023-11-23 14:35:52,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:35:52,195 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 518 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:52,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1301 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:35:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-11-23 14:35:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 646. [2023-11-23 14:35:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 637 states have (on average 1.3893249607535323) internal successors, (885), 639 states have internal predecessors, (885), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 14:35:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 897 transitions. [2023-11-23 14:35:52,209 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 897 transitions. Word has length 104 [2023-11-23 14:35:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:52,209 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 897 transitions. [2023-11-23 14:35:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 897 transitions. [2023-11-23 14:35:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-23 14:35:52,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:52,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:52,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:52,424 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,SelfDestructingSolverStorable11 [2023-11-23 14:35:52,424 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:52,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash 780229664, now seen corresponding path program 1 times [2023-11-23 14:35:52,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:52,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492444957] [2023-11-23 14:35:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:52,456 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:52,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954163326] [2023-11-23 14:35:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:52,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:52,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:52,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 14:35:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:52,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 14:35:52,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:35:52,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492444957] [2023-11-23 14:35:52,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954163326] [2023-11-23 14:35:52,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954163326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:52,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:52,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 14:35:52,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487150699] [2023-11-23 14:35:52,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:52,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:35:52,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:52,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:35:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:35:52,931 INFO L87 Difference]: Start difference. First operand 646 states and 897 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:53,095 INFO L93 Difference]: Finished difference Result 1263 states and 1754 transitions. [2023-11-23 14:35:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 14:35:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 158 [2023-11-23 14:35:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:53,098 INFO L225 Difference]: With dead ends: 1263 [2023-11-23 14:35:53,098 INFO L226 Difference]: Without dead ends: 783 [2023-11-23 14:35:53,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:35:53,100 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 878 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:53,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 932 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:35:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2023-11-23 14:35:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 775. [2023-11-23 14:35:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 765 states have (on average 1.3895424836601307) internal successors, (1063), 768 states have internal predecessors, (1063), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:35:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1077 transitions. [2023-11-23 14:35:53,117 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1077 transitions. Word has length 158 [2023-11-23 14:35:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:53,118 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1077 transitions. [2023-11-23 14:35:53,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1077 transitions. [2023-11-23 14:35:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-23 14:35:53,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:53,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:53,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:53,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 14:35:53,333 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:53,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash 312624781, now seen corresponding path program 1 times [2023-11-23 14:35:53,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:53,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828744562] [2023-11-23 14:35:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:53,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:53,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:53,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567605740] [2023-11-23 14:35:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:53,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:53,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:53,366 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:53,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 14:35:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:53,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 14:35:53,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:53,757 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 11 treesize of output 7 [2023-11-23 14:35:53,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:35:53,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 23 [2023-11-23 14:35:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:35:54,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:54,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828744562] [2023-11-23 14:35:54,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567605740] [2023-11-23 14:35:54,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567605740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:54,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:54,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 14:35:54,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171613017] [2023-11-23 14:35:54,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:54,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 14:35:54,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 14:35:54,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 14:35:54,038 INFO L87 Difference]: Start difference. First operand 775 states and 1077 transitions. Second operand has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:54,419 INFO L93 Difference]: Finished difference Result 1368 states and 1893 transitions. [2023-11-23 14:35:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 14:35:54,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-11-23 14:35:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:54,422 INFO L225 Difference]: With dead ends: 1368 [2023-11-23 14:35:54,422 INFO L226 Difference]: Without dead ends: 989 [2023-11-23 14:35:54,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-23 14:35:54,423 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 467 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 2442 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:54,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 2442 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:35:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2023-11-23 14:35:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 810. [2023-11-23 14:35:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 800 states have (on average 1.3775) internal successors, (1102), 803 states have internal predecessors, (1102), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:35:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1116 transitions. [2023-11-23 14:35:54,442 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1116 transitions. Word has length 168 [2023-11-23 14:35:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:54,442 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1116 transitions. [2023-11-23 14:35:54,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1116 transitions. [2023-11-23 14:35:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-23 14:35:54,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:54,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:54,457 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 14:35:54,658 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,SelfDestructingSolverStorable13 [2023-11-23 14:35:54,658 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:54,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:54,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1681804872, now seen corresponding path program 1 times [2023-11-23 14:35:54,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:54,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192414156] [2023-11-23 14:35:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:54,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:54,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796745402] [2023-11-23 14:35:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:54,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:54,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:54,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 14:35:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:55,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 14:35:55,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:35:55,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:55,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192414156] [2023-11-23 14:35:55,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:55,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796745402] [2023-11-23 14:35:55,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796745402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:55,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:55,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 14:35:55,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457816789] [2023-11-23 14:35:55,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 14:35:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 14:35:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:35:55,118 INFO L87 Difference]: Start difference. First operand 810 states and 1116 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:55,320 INFO L93 Difference]: Finished difference Result 1193 states and 1649 transitions. [2023-11-23 14:35:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 14:35:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 169 [2023-11-23 14:35:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:55,323 INFO L225 Difference]: With dead ends: 1193 [2023-11-23 14:35:55,323 INFO L226 Difference]: Without dead ends: 814 [2023-11-23 14:35:55,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:35:55,324 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 30 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:55,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1862 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:35:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2023-11-23 14:35:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 810. [2023-11-23 14:35:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 800 states have (on average 1.37375) internal successors, (1099), 803 states have internal predecessors, (1099), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:35:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1113 transitions. [2023-11-23 14:35:55,341 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1113 transitions. Word has length 169 [2023-11-23 14:35:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:55,342 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1113 transitions. [2023-11-23 14:35:55,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1113 transitions. [2023-11-23 14:35:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 14:35:55,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:55,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:55,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:55,556 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,SelfDestructingSolverStorable14 [2023-11-23 14:35:55,557 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:55,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:55,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1535751560, now seen corresponding path program 1 times [2023-11-23 14:35:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:55,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10939675] [2023-11-23 14:35:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:55,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:55,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:55,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265942724] [2023-11-23 14:35:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:55,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:55,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:55,588 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:55,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 14:35:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:55,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 14:35:55,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:35:56,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:35:56,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:56,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10939675] [2023-11-23 14:35:56,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:35:56,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265942724] [2023-11-23 14:35:56,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265942724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:56,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:56,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 14:35:56,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525512430] [2023-11-23 14:35:56,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:56,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 14:35:56,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:56,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 14:35:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:35:56,059 INFO L87 Difference]: Start difference. First operand 810 states and 1113 transitions. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:35:56,217 INFO L93 Difference]: Finished difference Result 1204 states and 1661 transitions. [2023-11-23 14:35:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 14:35:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-11-23 14:35:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:35:56,220 INFO L225 Difference]: With dead ends: 1204 [2023-11-23 14:35:56,220 INFO L226 Difference]: Without dead ends: 825 [2023-11-23 14:35:56,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:35:56,221 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 10 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:35:56,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1936 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:35:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2023-11-23 14:35:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 822. [2023-11-23 14:35:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 812 states have (on average 1.3719211822660098) internal successors, (1114), 815 states have internal predecessors, (1114), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:35:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1128 transitions. [2023-11-23 14:35:56,238 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1128 transitions. Word has length 170 [2023-11-23 14:35:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:35:56,239 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1128 transitions. [2023-11-23 14:35:56,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:35:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1128 transitions. [2023-11-23 14:35:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 14:35:56,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:35:56,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:56,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:56,455 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,SelfDestructingSolverStorable15 [2023-11-23 14:35:56,455 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:35:56,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:56,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1783898054, now seen corresponding path program 1 times [2023-11-23 14:35:56,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:56,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284128160] [2023-11-23 14:35:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:56,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:56,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:35:56,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891553756] [2023-11-23 14:35:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:56,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:56,498 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:35:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 14:35:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:56,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 14:35:56,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:36:07,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:36:07,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:36:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284128160] [2023-11-23 14:36:07,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:36:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891553756] [2023-11-23 14:36:07,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891553756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:36:07,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:36:07,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 14:36:07,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940073808] [2023-11-23 14:36:07,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:36:07,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 14:36:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:36:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 14:36:07,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:36:07,011 INFO L87 Difference]: Start difference. First operand 822 states and 1128 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:09,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:36:11,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:36:13,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:36:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:36:13,571 INFO L93 Difference]: Finished difference Result 1228 states and 1691 transitions. [2023-11-23 14:36:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 14:36:13,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-11-23 14:36:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:36:13,574 INFO L225 Difference]: With dead ends: 1228 [2023-11-23 14:36:13,574 INFO L226 Difference]: Without dead ends: 834 [2023-11-23 14:36:13,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:36:13,575 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 15 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-11-23 14:36:13,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2282 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-11-23 14:36:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-11-23 14:36:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 831. [2023-11-23 14:36:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 821 states have (on average 1.3678440925700366) internal successors, (1123), 824 states have internal predecessors, (1123), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:36:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1137 transitions. [2023-11-23 14:36:13,604 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1137 transitions. Word has length 170 [2023-11-23 14:36:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:36:13,604 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1137 transitions. [2023-11-23 14:36:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1137 transitions. [2023-11-23 14:36:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-23 14:36:13,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:36:13,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:36:13,622 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 14:36:13,820 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,SelfDestructingSolverStorable16 [2023-11-23 14:36:13,820 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:36:13,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:36:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1519037970, now seen corresponding path program 1 times [2023-11-23 14:36:13,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:36:13,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432102228] [2023-11-23 14:36:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:13,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:36:13,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:36:13,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627741284] [2023-11-23 14:36:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:13,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:36:13,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:36:13,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 14:36:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:36:14,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 14:36:14,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:36:14,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:36:14,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:36:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432102228] [2023-11-23 14:36:14,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:36:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627741284] [2023-11-23 14:36:14,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627741284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:36:14,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:36:14,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 14:36:14,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957341695] [2023-11-23 14:36:14,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:36:14,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 14:36:14,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:36:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 14:36:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:36:14,409 INFO L87 Difference]: Start difference. First operand 831 states and 1137 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:36:14,619 INFO L93 Difference]: Finished difference Result 1246 states and 1709 transitions. [2023-11-23 14:36:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 14:36:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 171 [2023-11-23 14:36:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:36:14,622 INFO L225 Difference]: With dead ends: 1246 [2023-11-23 14:36:14,622 INFO L226 Difference]: Without dead ends: 846 [2023-11-23 14:36:14,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:36:14,623 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 15 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:36:14,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2283 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:36:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2023-11-23 14:36:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 843. [2023-11-23 14:36:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 833 states have (on average 1.3661464585834333) internal successors, (1138), 836 states have internal predecessors, (1138), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:36:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1152 transitions. [2023-11-23 14:36:14,639 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1152 transitions. Word has length 171 [2023-11-23 14:36:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:36:14,640 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 1152 transitions. [2023-11-23 14:36:14,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1152 transitions. [2023-11-23 14:36:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-23 14:36:14,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:36:14,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:36:14,657 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 14:36:14,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:14,857 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:36:14,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:36:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash -277049143, now seen corresponding path program 1 times [2023-11-23 14:36:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:36:14,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389823076] [2023-11-23 14:36:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:14,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:36:14,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:36:14,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689799954] [2023-11-23 14:36:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:14,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:14,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:36:14,890 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:36:14,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 14:36:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:36:15,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 14:36:15,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:36:15,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:36:15,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:36:15,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389823076] [2023-11-23 14:36:15,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:36:15,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689799954] [2023-11-23 14:36:15,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689799954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:36:15,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:36:15,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 14:36:15,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762521319] [2023-11-23 14:36:15,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:36:15,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 14:36:15,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:36:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 14:36:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:36:15,385 INFO L87 Difference]: Start difference. First operand 843 states and 1152 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:36:15,593 INFO L93 Difference]: Finished difference Result 1278 states and 1747 transitions. [2023-11-23 14:36:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 14:36:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 171 [2023-11-23 14:36:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:36:15,596 INFO L225 Difference]: With dead ends: 1278 [2023-11-23 14:36:15,597 INFO L226 Difference]: Without dead ends: 866 [2023-11-23 14:36:15,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-23 14:36:15,598 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 45 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:36:15,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 2292 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:36:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-23 14:36:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 849. [2023-11-23 14:36:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 839 states have (on average 1.363528009535161) internal successors, (1144), 842 states have internal predecessors, (1144), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:36:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1158 transitions. [2023-11-23 14:36:15,631 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1158 transitions. Word has length 171 [2023-11-23 14:36:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:36:15,632 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1158 transitions. [2023-11-23 14:36:15,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1158 transitions. [2023-11-23 14:36:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-23 14:36:15,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:36:15,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:36:15,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 14:36:15,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:15,848 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:36:15,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:36:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1652925215, now seen corresponding path program 1 times [2023-11-23 14:36:15,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:36:15,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107534639] [2023-11-23 14:36:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:36:15,885 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:36:15,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885365925] [2023-11-23 14:36:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:36:15,886 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:36:15,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 14:36:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:36:16,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 14:36:16,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:36:16,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:36:16,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:36:16,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107534639] [2023-11-23 14:36:16,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:36:16,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885365925] [2023-11-23 14:36:16,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885365925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:36:16,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:36:16,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 14:36:16,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513746603] [2023-11-23 14:36:16,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:36:16,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:36:16,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:36:16,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:36:16,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:36:16,357 INFO L87 Difference]: Start difference. First operand 849 states and 1158 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:36:16,414 INFO L93 Difference]: Finished difference Result 1282 states and 1745 transitions. [2023-11-23 14:36:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:36:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 172 [2023-11-23 14:36:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:36:16,417 INFO L225 Difference]: With dead ends: 1282 [2023-11-23 14:36:16,417 INFO L226 Difference]: Without dead ends: 864 [2023-11-23 14:36:16,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:36:16,418 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 6 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:36:16,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1285 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:36:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2023-11-23 14:36:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 846. [2023-11-23 14:36:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 836 states have (on average 1.361244019138756) internal successors, (1138), 839 states have internal predecessors, (1138), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:36:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1152 transitions. [2023-11-23 14:36:16,433 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1152 transitions. Word has length 172 [2023-11-23 14:36:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:36:16,433 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1152 transitions. [2023-11-23 14:36:16,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1152 transitions. [2023-11-23 14:36:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-23 14:36:16,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:36:16,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:36:16,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 14:36:16,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:16,649 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:36:16,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:36:16,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1865740645, now seen corresponding path program 1 times [2023-11-23 14:36:16,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:36:16,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578110452] [2023-11-23 14:36:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:36:16,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:36:16,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380204784] [2023-11-23 14:36:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:16,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:16,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:36:16,681 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:36:16,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 14:36:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:36:17,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 14:36:17,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:36:26,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:36:26,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:36:26,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578110452] [2023-11-23 14:36:26,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:36:26,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380204784] [2023-11-23 14:36:26,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380204784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:36:26,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:36:26,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 14:36:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326013991] [2023-11-23 14:36:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:36:26,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 14:36:26,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:36:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 14:36:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:36:26,990 INFO L87 Difference]: Start difference. First operand 846 states and 1152 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:28,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:36:30,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:36:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:36:30,548 INFO L93 Difference]: Finished difference Result 1571 states and 2143 transitions. [2023-11-23 14:36:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 14:36:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 172 [2023-11-23 14:36:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:36:30,551 INFO L225 Difference]: With dead ends: 1571 [2023-11-23 14:36:30,551 INFO L226 Difference]: Without dead ends: 860 [2023-11-23 14:36:30,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:36:30,553 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 20 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-23 14:36:30,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1699 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-23 14:36:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-11-23 14:36:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 846. [2023-11-23 14:36:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 836 states have (on average 1.361244019138756) internal successors, (1138), 839 states have internal predecessors, (1138), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:36:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1152 transitions. [2023-11-23 14:36:30,569 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1152 transitions. Word has length 172 [2023-11-23 14:36:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:36:30,569 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1152 transitions. [2023-11-23 14:36:30,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1152 transitions. [2023-11-23 14:36:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-23 14:36:30,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:36:30,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:36:30,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-23 14:36:30,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:30,799 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:36:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:36:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1922720417, now seen corresponding path program 1 times [2023-11-23 14:36:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:36:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820151702] [2023-11-23 14:36:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:30,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:36:30,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:36:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985101264] [2023-11-23 14:36:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:30,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:30,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:36:30,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:36:30,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 14:36:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:36:31,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 14:36:31,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:36:31,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:36:31,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:36:31,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820151702] [2023-11-23 14:36:31,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:36:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985101264] [2023-11-23 14:36:31,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985101264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:36:31,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:36:31,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 14:36:31,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720629320] [2023-11-23 14:36:31,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:36:31,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 14:36:31,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:36:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 14:36:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:36:31,341 INFO L87 Difference]: Start difference. First operand 846 states and 1152 transitions. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:36:31,715 INFO L93 Difference]: Finished difference Result 1581 states and 2152 transitions. [2023-11-23 14:36:31,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 14:36:31,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 173 [2023-11-23 14:36:31,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:36:31,719 INFO L225 Difference]: With dead ends: 1581 [2023-11-23 14:36:31,719 INFO L226 Difference]: Without dead ends: 874 [2023-11-23 14:36:31,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-23 14:36:31,720 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 43 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:36:31,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2127 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:36:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-11-23 14:36:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 856. [2023-11-23 14:36:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 846 states have (on average 1.3593380614657211) internal successors, (1150), 849 states have internal predecessors, (1150), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:36:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1164 transitions. [2023-11-23 14:36:31,737 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1164 transitions. Word has length 173 [2023-11-23 14:36:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:36:31,738 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1164 transitions. [2023-11-23 14:36:31,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1164 transitions. [2023-11-23 14:36:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 14:36:31,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:36:31,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:36:31,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 14:36:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:31,948 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:36:31,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:36:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -710478, now seen corresponding path program 1 times [2023-11-23 14:36:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:36:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023276613] [2023-11-23 14:36:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:36:31,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:36:31,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123622954] [2023-11-23 14:36:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:31,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:36:31,980 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:36:32,009 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 14:36:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:36:32,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 14:36:32,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 14:36:32,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:36:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:36:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023276613] [2023-11-23 14:36:32,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:36:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123622954] [2023-11-23 14:36:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123622954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:36:32,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:36:32,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 14:36:32,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865918107] [2023-11-23 14:36:32,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:36:32,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 14:36:32,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:36:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 14:36:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 14:36:32,528 INFO L87 Difference]: Start difference. First operand 856 states and 1164 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:36:32,889 INFO L93 Difference]: Finished difference Result 1599 states and 2179 transitions. [2023-11-23 14:36:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 14:36:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 174 [2023-11-23 14:36:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:36:32,892 INFO L225 Difference]: With dead ends: 1599 [2023-11-23 14:36:32,892 INFO L226 Difference]: Without dead ends: 878 [2023-11-23 14:36:32,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 14:36:32,893 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 20 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:36:32,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2469 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:36:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-11-23 14:36:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 868. [2023-11-23 14:36:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 858 states have (on average 1.3566433566433567) internal successors, (1164), 861 states have internal predecessors, (1164), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 14:36:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1178 transitions. [2023-11-23 14:36:32,910 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1178 transitions. Word has length 174 [2023-11-23 14:36:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:36:32,910 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1178 transitions. [2023-11-23 14:36:32,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1178 transitions. [2023-11-23 14:36:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-23 14:36:32,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:36:32,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:36:32,927 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 14:36:33,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:33,124 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:36:33,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:36:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -279670064, now seen corresponding path program 1 times [2023-11-23 14:36:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:36:33,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386676653] [2023-11-23 14:36:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:33,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:36:33,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:36:33,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998794675] [2023-11-23 14:36:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:33,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:33,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:36:33,157 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 14:36:33,158 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 14:36:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:36:34,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 14:36:34,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 14:36:34,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:36:34,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:36:34,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386676653] [2023-11-23 14:36:34,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 14:36:34,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998794675] [2023-11-23 14:36:34,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998794675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:36:34,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:36:34,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 14:36:34,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454946115] [2023-11-23 14:36:34,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:36:34,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:36:34,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:36:34,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:36:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:36:34,213 INFO L87 Difference]: Start difference. First operand 868 states and 1178 transitions. Second operand has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:36:34,251 INFO L93 Difference]: Finished difference Result 1558 states and 2112 transitions. [2023-11-23 14:36:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:36:34,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 174 [2023-11-23 14:36:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:36:34,258 INFO L225 Difference]: With dead ends: 1558 [2023-11-23 14:36:34,258 INFO L226 Difference]: Without dead ends: 870 [2023-11-23 14:36:34,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:36:34,260 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 1 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:36:34,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1322 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:36:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-11-23 14:36:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2023-11-23 14:36:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 859 states have (on average 1.3573923166472643) internal successors, (1166), 863 states have internal predecessors, (1166), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-23 14:36:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1181 transitions. [2023-11-23 14:36:34,280 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1181 transitions. Word has length 174 [2023-11-23 14:36:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:36:34,280 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1181 transitions. [2023-11-23 14:36:34,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 14:36:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1181 transitions. [2023-11-23 14:36:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-23 14:36:34,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:36:34,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:36:34,295 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 14:36:34,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-23 14:36:34,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:36:34,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:36:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1627701422, now seen corresponding path program 1 times [2023-11-23 14:36:34,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:36:34,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960760238] [2023-11-23 14:36:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:36:34,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 14:36:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411789673] [2023-11-23 14:36:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:36:34,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:36:34,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:36:34,531 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 14:36:34,532 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 14:36:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:36:35,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-23 14:36:35,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:36:35,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-23 14:36:35,567 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 14:36:35,580 INFO L349 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2023-11-23 14:36:35,580 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 25 treesize of output 29 [2023-11-23 14:36:35,588 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 11 treesize of output 7 [2023-11-23 14:36:35,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-23 14:36:35,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-23 14:36:35,724 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 14:36:35,725 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-23 14:36:35,739 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 24 treesize of output 11 [2023-11-23 14:36:39,021 INFO L224 Elim1Store]: Index analysis took 216 ms