./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/gcas_11_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/gcas_11_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx --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 c492f0cdd8bb01d53b2d1acc81bfd6ad3713078865bf5699b523bc656cb1eda2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:20:40,406 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:20:40,556 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:20:40,561 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:20:40,562 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:20:40,591 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:20:40,592 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:20:40,593 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:20:40,594 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:20:40,595 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:20:40,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:20:40,596 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:20:40,598 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:20:40,598 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:20:40,599 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:20:40,600 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:20:40,600 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:20:40,601 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:20:40,602 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:20:40,602 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:20:40,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:20:40,605 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:20:40,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:20:40,606 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:20:40,607 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:20:40,607 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:20:40,608 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:20:40,609 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:20:40,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:20:40,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:20:40,612 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:20:40,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:20:40,612 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:20:40,613 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:20:40,613 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:20:40,613 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:20:40,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:20:40,614 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:20:40,614 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:20:40,615 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:20:40,615 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:20:40,616 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:20:40,616 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c492f0cdd8bb01d53b2d1acc81bfd6ad3713078865bf5699b523bc656cb1eda2 [2023-11-21 22:20:41,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:20:41,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:20:41,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:20:41,068 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:20:41,068 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:20:41,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/neural-networks/gcas_11_safe.c-amalgamation.i [2023-11-21 22:20:44,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:20:45,152 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:20:45,154 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/sv-benchmarks/c/neural-networks/gcas_11_safe.c-amalgamation.i [2023-11-21 22:20:45,199 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/data/2168da936/c7f0fb37da3c4096966e23a74bd25459/FLAG0c79b267a [2023-11-21 22:20:45,221 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/data/2168da936/c7f0fb37da3c4096966e23a74bd25459 [2023-11-21 22:20:45,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:20:45,234 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:20:45,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:20:45,238 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:20:45,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:20:45,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:20:45" (1/1) ... [2023-11-21 22:20:45,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae421b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:45, skipping insertion in model container [2023-11-21 22:20:45,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:20:45" (1/1) ... [2023-11-21 22:20:45,358 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:20:45,732 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 22:20:46,612 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/sv-benchmarks/c/neural-networks/gcas_11_safe.c-amalgamation.i[65243,65256] [2023-11-21 22:20:46,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:47,091 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:20:47,129 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 22:20:47,211 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/sv-benchmarks/c/neural-networks/gcas_11_safe.c-amalgamation.i[65243,65256] [2023-11-21 22:20:47,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:47,788 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:20:47,797 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:20:47,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47 WrapperNode [2023-11-21 22:20:47,798 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:20:47,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:20:47,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:20:47,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:20:47,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:47,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,150 INFO L138 Inliner]: procedures = 620, calls = 2158, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 2547 [2023-11-21 22:20:48,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:20:48,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:20:48,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:20:48,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:20:48,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,209 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,263 INFO L187 HeapSplitter]: Split 2133 memory accesses to 12 slices as follows [2, 7, 449, 33, 1025, 33, 449, 3, 15, 38, 36, 43] [2023-11-21 22:20:48,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:20:48,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:20:48,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:20:48,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:20:48,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (1/1) ... [2023-11-21 22:20:48,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:20:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:48,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:20:48,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:20:48,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-21 22:20:48,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-21 22:20:48,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-21 22:20:48,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-21 22:20:48,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-21 22:20:48,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-21 22:20:48,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-21 22:20:48,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-21 22:20:48,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-21 22:20:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-21 22:20:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-21 22:20:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-21 22:20:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:20:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-21 22:20:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-21 22:20:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-21 22:20:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-21 22:20:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-21 22:20:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-21 22:20:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-21 22:20:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-21 22:20:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-21 22:20:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-21 22:20:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-21 22:20:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-21 22:20:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-21 22:20:48,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-21 22:20:48,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-21 22:20:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-21 22:20:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-21 22:20:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-21 22:20:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-21 22:20:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-21 22:20:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-21 22:20:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-21 22:20:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-21 22:20:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-21 22:20:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:20:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:20:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:20:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:20:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:20:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:20:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 22:20:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-21 22:20:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-21 22:20:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-21 22:20:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-21 22:20:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-21 22:20:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-21 22:20:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-21 22:20:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-21 22:20:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-21 22:20:48,817 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:20:48,819 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:20:54,500 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:20:57,357 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:20:57,358 INFO L308 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-21 22:20:57,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:20:57 BoogieIcfgContainer [2023-11-21 22:20:57,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:20:57,364 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:20:57,364 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:20:57,368 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:20:57,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:20:45" (1/3) ... [2023-11-21 22:20:57,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707e5dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:20:57, skipping insertion in model container [2023-11-21 22:20:57,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:47" (2/3) ... [2023-11-21 22:20:57,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707e5dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:20:57, skipping insertion in model container [2023-11-21 22:20:57,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:20:57" (3/3) ... [2023-11-21 22:20:57,374 INFO L112 eAbstractionObserver]: Analyzing ICFG gcas_11_safe.c-amalgamation.i [2023-11-21 22:20:57,398 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:20:57,399 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:20:57,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:20:57,477 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;@108aab3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:20:57,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:20:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:20:57,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:57,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:57,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:20:57,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 146369975, now seen corresponding path program 1 times [2023-11-21 22:20:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:57,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082728953] [2023-11-21 22:20:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:57,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:59,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:59,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082728953] [2023-11-21 22:20:59,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082728953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:59,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:20:59,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015759208] [2023-11-21 22:20:59,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:59,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:20:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:20:59,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:20:59,308 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:20:59,814 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2023-11-21 22:20:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:20:59,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:20:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:20:59,826 INFO L225 Difference]: With dead ends: 30 [2023-11-21 22:20:59,826 INFO L226 Difference]: Without dead ends: 16 [2023-11-21 22:20:59,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:20:59,834 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:20:59,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:20:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-21 22:20:59,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-21 22:20:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 26 transitions. [2023-11-21 22:20:59,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 26 transitions. Word has length 8 [2023-11-21 22:20:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:20:59,876 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 26 transitions. [2023-11-21 22:20:59,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 26 transitions. [2023-11-21 22:20:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 22:20:59,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:59,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:59,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:20:59,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:20:59,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:59,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1495813912, now seen corresponding path program 1 times [2023-11-21 22:20:59,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:59,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22238660] [2023-11-21 22:20:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:59,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:01,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:01,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22238660] [2023-11-21 22:21:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22238660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:01,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143236768] [2023-11-21 22:21:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:01,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:01,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:01,097 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:21:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:02,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:21:02,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:21:02,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:21:02,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143236768] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:02,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:21:02,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-21 22:21:02,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454829519] [2023-11-21 22:21:02,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:02,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:21:02,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:21:02,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:21:02,511 INFO L87 Difference]: Start difference. First operand 16 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:03,004 INFO L93 Difference]: Finished difference Result 23 states and 36 transitions. [2023-11-21 22:21:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:21:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-21 22:21:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:03,006 INFO L225 Difference]: With dead ends: 23 [2023-11-21 22:21:03,006 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 22:21:03,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:21:03,009 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:03,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:21:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 22:21:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-21 22:21:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2023-11-21 22:21:03,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 9 [2023-11-21 22:21:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:03,016 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2023-11-21 22:21:03,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2023-11-21 22:21:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 22:21:03,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:03,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:03,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:03,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 22:21:03,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:03,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:03,235 INFO L85 PathProgramCache]: Analyzing trace with hash -929460487, now seen corresponding path program 1 times [2023-11-21 22:21:03,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:03,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135291573] [2023-11-21 22:21:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:03,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:21:04,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135291573] [2023-11-21 22:21:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135291573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:04,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113590924] [2023-11-21 22:21:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:04,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:04,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:04,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:04,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:21:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:05,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:21:05,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:21:05,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:21:05,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113590924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:05,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:21:05,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-21 22:21:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546100930] [2023-11-21 22:21:05,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:05,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:21:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:05,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:21:05,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:21:05,333 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:05,684 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2023-11-21 22:21:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:21:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 22:21:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:05,686 INFO L225 Difference]: With dead ends: 33 [2023-11-21 22:21:05,686 INFO L226 Difference]: Without dead ends: 20 [2023-11-21 22:21:05,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:21:05,688 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:05,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:21:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-21 22:21:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-11-21 22:21:05,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2023-11-21 22:21:05,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 10 [2023-11-21 22:21:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:05,697 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2023-11-21 22:21:05,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2023-11-21 22:21:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 22:21:05,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:05,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:05,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:05,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:05,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:05,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:05,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1848760725, now seen corresponding path program 1 times [2023-11-21 22:21:05,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:05,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454954947] [2023-11-21 22:21:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:05,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:21:07,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:07,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454954947] [2023-11-21 22:21:07,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454954947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:07,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280402982] [2023-11-21 22:21:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:07,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:07,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:07,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:07,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:21:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:08,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:21:08,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:21:08,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:21:08,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280402982] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:08,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:21:08,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-21 22:21:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33594916] [2023-11-21 22:21:08,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:08,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:21:08,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:08,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:21:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:21:08,275 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:08,595 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-11-21 22:21:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:21:08,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 22:21:08,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:08,597 INFO L225 Difference]: With dead ends: 27 [2023-11-21 22:21:08,597 INFO L226 Difference]: Without dead ends: 19 [2023-11-21 22:21:08,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:21:08,599 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:08,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:21:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-21 22:21:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-21 22:21:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2023-11-21 22:21:08,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 12 [2023-11-21 22:21:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:08,605 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2023-11-21 22:21:08,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:08,606 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2023-11-21 22:21:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 22:21:08,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:08,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:08,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:08,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:08,808 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:08,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash -609433948, now seen corresponding path program 1 times [2023-11-21 22:21:08,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:08,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563731125] [2023-11-21 22:21:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:21:09,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563731125] [2023-11-21 22:21:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563731125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451422242] [2023-11-21 22:21:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:09,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:09,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:09,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:09,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:21:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:10,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:21:10,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:21:10,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:21:10,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451422242] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:10,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:21:10,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-21 22:21:10,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876170525] [2023-11-21 22:21:10,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:10,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:21:10,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:21:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:21:10,915 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:11,366 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2023-11-21 22:21:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:21:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-21 22:21:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:11,368 INFO L225 Difference]: With dead ends: 23 [2023-11-21 22:21:11,368 INFO L226 Difference]: Without dead ends: 20 [2023-11-21 22:21:11,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:21:11,370 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:11,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:21:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-21 22:21:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-21 22:21:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 30 transitions. [2023-11-21 22:21:11,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 30 transitions. Word has length 14 [2023-11-21 22:21:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:11,376 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 30 transitions. [2023-11-21 22:21:11,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 30 transitions. [2023-11-21 22:21:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:21:11,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:11,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:11,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:11,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:11,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:11,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:11,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1680466798, now seen corresponding path program 1 times [2023-11-21 22:21:11,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:11,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534439604] [2023-11-21 22:21:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:11,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:21:12,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:12,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534439604] [2023-11-21 22:21:12,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534439604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:12,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658643492] [2023-11-21 22:21:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:12,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:12,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:21:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:13,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:21:13,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:21:13,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:21:13,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658643492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:21:13,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:21:13,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 22:21:13,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86401904] [2023-11-21 22:21:13,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:21:13,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:21:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:21:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:21:13,758 INFO L87 Difference]: Start difference. First operand 20 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:14,483 INFO L93 Difference]: Finished difference Result 36 states and 55 transitions. [2023-11-21 22:21:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:21:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 22:21:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:14,485 INFO L225 Difference]: With dead ends: 36 [2023-11-21 22:21:14,485 INFO L226 Difference]: Without dead ends: 23 [2023-11-21 22:21:14,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:21:14,487 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:14,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:21:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-21 22:21:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-21 22:21:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2023-11-21 22:21:14,495 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 16 [2023-11-21 22:21:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:14,495 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2023-11-21 22:21:14,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2023-11-21 22:21:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 22:21:14,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:14,497 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:14,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:14,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:14,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:14,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1011259119, now seen corresponding path program 2 times [2023-11-21 22:21:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:14,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461306650] [2023-11-21 22:21:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:14,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:21:15,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:15,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461306650] [2023-11-21 22:21:15,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461306650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308204231] [2023-11-21 22:21:15,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:21:15,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:15,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:15,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:15,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:21:16,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:21:16,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:21:16,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:21:16,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:21:16,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:21:16,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308204231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:21:16,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:21:16,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-21 22:21:16,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832750582] [2023-11-21 22:21:16,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:16,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:21:16,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:21:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:21:16,982 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:17,386 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2023-11-21 22:21:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:21:17,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-21 22:21:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:17,388 INFO L225 Difference]: With dead ends: 46 [2023-11-21 22:21:17,388 INFO L226 Difference]: Without dead ends: 25 [2023-11-21 22:21:17,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:21:17,390 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:17,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:21:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-21 22:21:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-21 22:21:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2023-11-21 22:21:17,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2023-11-21 22:21:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:17,398 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2023-11-21 22:21:17,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2023-11-21 22:21:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 22:21:17,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:17,400 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:17,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:17,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:17,600 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:17,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:17,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1960004360, now seen corresponding path program 1 times [2023-11-21 22:21:17,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:17,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876474543] [2023-11-21 22:21:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:17,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:21:18,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:18,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876474543] [2023-11-21 22:21:18,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876474543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:18,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591890640] [2023-11-21 22:21:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:18,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:18,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:18,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:21:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:19,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:21:19,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:21:19,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 22:21:19,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591890640] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:19,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:21:19,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 13 [2023-11-21 22:21:19,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607966075] [2023-11-21 22:21:19,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:19,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:21:19,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:19,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:21:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:21:19,850 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:20,239 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2023-11-21 22:21:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:21:20,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-21 22:21:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:20,241 INFO L225 Difference]: With dead ends: 37 [2023-11-21 22:21:20,241 INFO L226 Difference]: Without dead ends: 25 [2023-11-21 22:21:20,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:21:20,243 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:20,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:21:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-21 22:21:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-21 22:21:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2023-11-21 22:21:20,251 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 21 [2023-11-21 22:21:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:20,251 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2023-11-21 22:21:20,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2023-11-21 22:21:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:21:20,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:20,253 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:20,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:20,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 22:21:20,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:20,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1618457179, now seen corresponding path program 1 times [2023-11-21 22:21:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729525873] [2023-11-21 22:21:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:20,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:21:21,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:21,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729525873] [2023-11-21 22:21:21,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729525873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:21,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009579911] [2023-11-21 22:21:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:21,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:21,350 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:21,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:21:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:22,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:21:22,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:21:22,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 22:21:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009579911] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:22,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:21:22,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 13 [2023-11-21 22:21:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116775109] [2023-11-21 22:21:22,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:21:22,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:21:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:21:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:21:22,583 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:22,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:22,959 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2023-11-21 22:21:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:21:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-21 22:21:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:22,961 INFO L225 Difference]: With dead ends: 39 [2023-11-21 22:21:22,961 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 22:21:22,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:21:22,962 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:22,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:21:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 22:21:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-21 22:21:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2023-11-21 22:21:22,971 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 23 [2023-11-21 22:21:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:22,972 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2023-11-21 22:21:22,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2023-11-21 22:21:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:21:22,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:22,974 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:23,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:23,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-21 22:21:23,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:23,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash 657456760, now seen corresponding path program 1 times [2023-11-21 22:21:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:23,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55727987] [2023-11-21 22:21:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:23,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:21:23,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:21:23,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55727987] [2023-11-21 22:21:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55727987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:21:23,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411285769] [2023-11-21 22:21:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:23,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:21:23,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:21:23,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:21:24,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:21:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:21:24,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:21:24,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:21:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:21:25,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:21:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-21 22:21:25,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411285769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:21:25,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:21:25,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 11 [2023-11-21 22:21:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426404137] [2023-11-21 22:21:25,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:21:25,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:21:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:21:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:21:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:21:25,059 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:21:25,996 INFO L93 Difference]: Finished difference Result 45 states and 65 transitions. [2023-11-21 22:21:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:21:25,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-21 22:21:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:21:25,998 INFO L225 Difference]: With dead ends: 45 [2023-11-21 22:21:25,998 INFO L226 Difference]: Without dead ends: 30 [2023-11-21 22:21:25,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:21:25,999 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:21:26,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:21:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-21 22:21:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-21 22:21:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2023-11-21 22:21:26,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 24 [2023-11-21 22:21:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:21:26,007 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2023-11-21 22:21:26,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:21:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2023-11-21 22:21:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:21:26,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:21:26,008 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:21:26,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:21:26,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c85380ae-0280-4f75-83c5-c1e15993a3f8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:21:26,213 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:21:26,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:21:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1490733318, now seen corresponding path program 2 times [2023-11-21 22:21:26,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:21:26,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23305261] [2023-11-21 22:21:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:21:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:21:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat