./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ --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 d619c50f205026415119876db06c9bf079f51316bee7c051af8e3a06a37e393d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:35:05,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:35:05,956 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:35:05,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:35:05,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:35:06,004 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:35:06,004 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:35:06,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:35:06,006 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:35:06,006 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:35:06,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:35:06,007 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:35:06,008 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:35:06,009 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:35:06,009 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:35:06,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:35:06,010 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:35:06,011 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:35:06,011 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:35:06,012 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:35:06,012 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:35:06,018 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:35:06,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:35:06,019 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:35:06,019 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:35:06,020 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:35:06,020 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:35:06,020 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:35:06,021 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:35:06,021 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:35:06,021 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:35:06,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:35:06,022 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:35:06,023 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:35:06,023 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:35:06,023 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:35:06,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:35:06,024 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:35:06,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:35:06,035 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:35:06,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:35:06,037 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:35:06,037 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_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d619c50f205026415119876db06c9bf079f51316bee7c051af8e3a06a37e393d [2023-11-23 22:35:06,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:35:06,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:35:06,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:35:06,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:35:06,364 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:35:06,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i [2023-11-23 22:35:09,520 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:35:09,936 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:35:09,937 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i [2023-11-23 22:35:09,972 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/data/8e7a51569/e1eae9e8fd1c475091fd0481ac8d98d9/FLAG5378791b2 [2023-11-23 22:35:09,995 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/data/8e7a51569/e1eae9e8fd1c475091fd0481ac8d98d9 [2023-11-23 22:35:09,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:35:10,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:35:10,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:35:10,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:35:10,015 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:35:10,016 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:35:09" (1/1) ... [2023-11-23 22:35:10,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3f0263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:10, skipping insertion in model container [2023-11-23 22:35:10,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:35:09" (1/1) ... [2023-11-23 22:35:10,114 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:35:10,607 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_a075aa48-944e-46f5-821e-077f77c29252/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[37019,37032] [2023-11-23 22:35:10,778 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_a075aa48-944e-46f5-821e-077f77c29252/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[47352,47365] [2023-11-23 22:35:10,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:35:10,832 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:35:10,885 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_a075aa48-944e-46f5-821e-077f77c29252/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[37019,37032] [2023-11-23 22:35:10,945 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_a075aa48-944e-46f5-821e-077f77c29252/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[47352,47365] [2023-11-23 22:35:10,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:35:11,017 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:35:11,025 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:35:11,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11 WrapperNode [2023-11-23 22:35:11,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:35:11,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:35:11,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:35:11,031 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:35:11,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,092 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,162 INFO L138 Inliner]: procedures = 208, calls = 286, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1372 [2023-11-23 22:35:11,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:35:11,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:35:11,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:35:11,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:35:11,175 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,186 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,290 INFO L189 HeapSplitter]: Split 261 memory accesses to 5 slices as follows [34, 2, 5, 220, 0] [2023-11-23 22:35:11,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,404 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:35:11,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:35:11,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:35:11,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:35:11,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (1/1) ... [2023-11-23 22:35:11,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:35:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:11,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:35:11,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:35:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-23 22:35:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-23 22:35:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-23 22:35:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-23 22:35:11,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#4 [2023-11-23 22:35:11,582 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-23 22:35:11,582 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-23 22:35:11,582 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-23 22:35:11,583 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-23 22:35:11,583 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#4 [2023-11-23 22:35:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:35:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 22:35:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 22:35:11,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 22:35:11,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 22:35:11,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 22:35:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 22:35:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:35:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:35:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:35:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:35:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:35:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:35:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 22:35:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 22:35:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:35:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:35:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:35:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:35:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:35:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:35:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:35:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 22:35:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 22:35:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 22:35:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 22:35:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 22:35:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:35:11,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:35:11,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:35:11,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:35:11,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:35:11,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:35:11,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:35:11,875 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:35:11,878 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:35:13,715 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:35:13,803 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:35:13,804 INFO L309 CfgBuilder]: Removed 63 assume(true) statements. [2023-11-23 22:35:13,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:35:13 BoogieIcfgContainer [2023-11-23 22:35:13,804 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:35:13,807 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:35:13,807 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:35:13,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:35:13,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:35:09" (1/3) ... [2023-11-23 22:35:13,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6957b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:35:13, skipping insertion in model container [2023-11-23 22:35:13,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:11" (2/3) ... [2023-11-23 22:35:13,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6957b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:35:13, skipping insertion in model container [2023-11-23 22:35:13,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:35:13" (3/3) ... [2023-11-23 22:35:13,814 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test2-2.i [2023-11-23 22:35:13,834 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:35:13,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 22:35:13,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:35:13,903 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;@4a8189e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:35:13,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 22:35:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 355 states have (on average 1.7070422535211267) internal successors, (606), 362 states have internal predecessors, (606), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:35:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 22:35:13,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:13,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:13,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:13,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1627372840, now seen corresponding path program 1 times [2023-11-23 22:35:13,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:13,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653719712] [2023-11-23 22:35:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:14,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:14,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653719712] [2023-11-23 22:35:14,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653719712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:14,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:14,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:35:14,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884345488] [2023-11-23 22:35:14,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:14,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:35:14,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:14,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:35:14,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:35:14,192 INFO L87 Difference]: Start difference. First operand has 368 states, 355 states have (on average 1.7070422535211267) internal successors, (606), 362 states have internal predecessors, (606), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-23 22:35:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:14,316 INFO L93 Difference]: Finished difference Result 735 states and 1248 transitions. [2023-11-23 22:35:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:35:14,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2023-11-23 22:35:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:14,333 INFO L225 Difference]: With dead ends: 735 [2023-11-23 22:35:14,333 INFO L226 Difference]: Without dead ends: 333 [2023-11-23 22:35:14,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:35:14,342 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:14,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 548 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:35:14,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-23 22:35:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2023-11-23 22:35:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 321 states have (on average 1.5233644859813085) internal successors, (489), 327 states have internal predecessors, (489), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:35:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 505 transitions. [2023-11-23 22:35:14,413 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 505 transitions. Word has length 8 [2023-11-23 22:35:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:14,439 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 505 transitions. [2023-11-23 22:35:14,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-11-23 22:35:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 505 transitions. [2023-11-23 22:35:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 22:35:14,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:14,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:14,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:35:14,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:14,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:14,446 INFO L85 PathProgramCache]: Analyzing trace with hash -846845216, now seen corresponding path program 1 times [2023-11-23 22:35:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:14,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001529759] [2023-11-23 22:35:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:14,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:14,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:14,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001529759] [2023-11-23 22:35:14,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001529759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:14,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:14,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646182890] [2023-11-23 22:35:14,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:14,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:14,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:14,964 INFO L87 Difference]: Start difference. First operand 333 states and 505 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-23 22:35:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:15,156 INFO L93 Difference]: Finished difference Result 811 states and 1240 transitions. [2023-11-23 22:35:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2023-11-23 22:35:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:15,167 INFO L225 Difference]: With dead ends: 811 [2023-11-23 22:35:15,167 INFO L226 Difference]: Without dead ends: 655 [2023-11-23 22:35:15,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:15,173 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 476 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:15,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1520 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:35:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-11-23 22:35:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 335. [2023-11-23 22:35:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 323 states have (on average 1.520123839009288) internal successors, (491), 329 states have internal predecessors, (491), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:35:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 507 transitions. [2023-11-23 22:35:15,226 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 507 transitions. Word has length 63 [2023-11-23 22:35:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:15,226 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 507 transitions. [2023-11-23 22:35:15,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-23 22:35:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 507 transitions. [2023-11-23 22:35:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 22:35:15,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:15,235 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:15,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:35:15,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:15,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -537779276, now seen corresponding path program 1 times [2023-11-23 22:35:15,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:15,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096195653] [2023-11-23 22:35:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:15,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:15,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:15,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385642205] [2023-11-23 22:35:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:15,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:15,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:35:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:15,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:35:15,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:15,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:35:15,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096195653] [2023-11-23 22:35:15,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385642205] [2023-11-23 22:35:15,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385642205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:15,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:15,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195000624] [2023-11-23 22:35:15,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:15,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:35:15,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:35:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:15,821 INFO L87 Difference]: Start difference. First operand 335 states and 507 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2023-11-23 22:35:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:15,922 INFO L93 Difference]: Finished difference Result 688 states and 1042 transitions. [2023-11-23 22:35:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:35:15,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 139 [2023-11-23 22:35:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:15,927 INFO L225 Difference]: With dead ends: 688 [2023-11-23 22:35:15,927 INFO L226 Difference]: Without dead ends: 356 [2023-11-23 22:35:15,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:15,930 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 9 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:15,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 950 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:35:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-23 22:35:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 355. [2023-11-23 22:35:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 343 states have (on average 1.489795918367347) internal successors, (511), 349 states have internal predecessors, (511), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:35:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 527 transitions. [2023-11-23 22:35:15,947 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 527 transitions. Word has length 139 [2023-11-23 22:35:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:15,948 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 527 transitions. [2023-11-23 22:35:15,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2023-11-23 22:35:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 527 transitions. [2023-11-23 22:35:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 22:35:15,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:15,954 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:15,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:16,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:16,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:16,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash 744393010, now seen corresponding path program 1 times [2023-11-23 22:35:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:16,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887403464] [2023-11-23 22:35:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:16,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:16,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314687009] [2023-11-23 22:35:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:16,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:16,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:16,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:16,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:35:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:16,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:35:16,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:35:16,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:35:16,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:16,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887403464] [2023-11-23 22:35:16,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:16,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314687009] [2023-11-23 22:35:16,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314687009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:16,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:16,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:16,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918316452] [2023-11-23 22:35:16,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:16,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:35:16,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:35:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:16,681 INFO L87 Difference]: Start difference. First operand 355 states and 527 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2023-11-23 22:35:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:16,800 INFO L93 Difference]: Finished difference Result 531 states and 797 transitions. [2023-11-23 22:35:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:35:16,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 139 [2023-11-23 22:35:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:16,807 INFO L225 Difference]: With dead ends: 531 [2023-11-23 22:35:16,807 INFO L226 Difference]: Without dead ends: 376 [2023-11-23 22:35:16,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:16,809 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 9 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:16,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 950 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:35:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-23 22:35:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 375. [2023-11-23 22:35:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 363 states have (on average 1.462809917355372) internal successors, (531), 369 states have internal predecessors, (531), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:35:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 547 transitions. [2023-11-23 22:35:16,823 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 547 transitions. Word has length 139 [2023-11-23 22:35:16,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:16,824 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 547 transitions. [2023-11-23 22:35:16,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2023-11-23 22:35:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 547 transitions. [2023-11-23 22:35:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 22:35:16,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:16,827 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:16,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:17,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:17,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:17,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1138759796, now seen corresponding path program 1 times [2023-11-23 22:35:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:17,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221468429] [2023-11-23 22:35:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:17,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:17,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431217354] [2023-11-23 22:35:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:17,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:17,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:17,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:35:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:17,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:35:17,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:17,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:35:17,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:17,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221468429] [2023-11-23 22:35:17,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:17,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431217354] [2023-11-23 22:35:17,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431217354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:17,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:17,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:35:17,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328505183] [2023-11-23 22:35:17,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:17,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:17,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:17,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:17,505 INFO L87 Difference]: Start difference. First operand 375 states and 547 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2023-11-23 22:35:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:17,609 INFO L93 Difference]: Finished difference Result 734 states and 1078 transitions. [2023-11-23 22:35:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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 139 [2023-11-23 22:35:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:17,612 INFO L225 Difference]: With dead ends: 734 [2023-11-23 22:35:17,613 INFO L226 Difference]: Without dead ends: 362 [2023-11-23 22:35:17,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:17,615 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 165 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:17,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1273 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:35:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-23 22:35:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 361. [2023-11-23 22:35:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 349 states have (on average 1.4613180515759312) internal successors, (510), 355 states have internal predecessors, (510), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:35:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 526 transitions. [2023-11-23 22:35:17,630 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 526 transitions. Word has length 139 [2023-11-23 22:35:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:17,631 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 526 transitions. [2023-11-23 22:35:17,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2023-11-23 22:35:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 526 transitions. [2023-11-23 22:35:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 22:35:17,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:17,634 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:17,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:17,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:17,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:17,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1690278658, now seen corresponding path program 1 times [2023-11-23 22:35:17,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:17,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344536053] [2023-11-23 22:35:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:17,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:17,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:17,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495692163] [2023-11-23 22:35:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:17,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:17,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:17,947 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:17,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:35:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:18,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:35:18,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:35:18,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:35:18,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344536053] [2023-11-23 22:35:18,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495692163] [2023-11-23 22:35:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495692163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:18,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:35:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859464125] [2023-11-23 22:35:18,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:18,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:18,377 INFO L87 Difference]: Start difference. First operand 361 states and 526 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2023-11-23 22:35:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:18,495 INFO L93 Difference]: Finished difference Result 523 states and 772 transitions. [2023-11-23 22:35:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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 139 [2023-11-23 22:35:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:18,500 INFO L225 Difference]: With dead ends: 523 [2023-11-23 22:35:18,500 INFO L226 Difference]: Without dead ends: 348 [2023-11-23 22:35:18,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:18,502 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 165 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:18,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1252 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:35:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-23 22:35:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2023-11-23 22:35:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 335 states have (on average 1.4597014925373135) internal successors, (489), 341 states have internal predecessors, (489), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:35:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 505 transitions. [2023-11-23 22:35:18,517 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 505 transitions. Word has length 139 [2023-11-23 22:35:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:18,518 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 505 transitions. [2023-11-23 22:35:18,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2023-11-23 22:35:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 505 transitions. [2023-11-23 22:35:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 22:35:18,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:18,521 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:18,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:18,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:35:18,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:18,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash -853042764, now seen corresponding path program 1 times [2023-11-23 22:35:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:18,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691432142] [2023-11-23 22:35:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:18,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:18,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313915112] [2023-11-23 22:35:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:18,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:18,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:18,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:18,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:35:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:19,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:35:19,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:19,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:35:19,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691432142] [2023-11-23 22:35:19,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313915112] [2023-11-23 22:35:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313915112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:19,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:19,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:35:19,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469866720] [2023-11-23 22:35:19,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:19,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:35:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:35:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:19,510 INFO L87 Difference]: Start difference. First operand 347 states and 505 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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) [2023-11-23 22:35:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:19,599 INFO L93 Difference]: Finished difference Result 943 states and 1389 transitions. [2023-11-23 22:35:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:35:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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 139 [2023-11-23 22:35:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:19,604 INFO L225 Difference]: With dead ends: 943 [2023-11-23 22:35:19,604 INFO L226 Difference]: Without dead ends: 599 [2023-11-23 22:35:19,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:19,606 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 310 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:19,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1126 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:35:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2023-11-23 22:35:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2023-11-23 22:35:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 580 states have (on average 1.4793103448275862) internal successors, (858), 591 states have internal predecessors, (858), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 22:35:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 884 transitions. [2023-11-23 22:35:19,633 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 884 transitions. Word has length 139 [2023-11-23 22:35:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:19,633 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 884 transitions. [2023-11-23 22:35:19,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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) [2023-11-23 22:35:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 884 transitions. [2023-11-23 22:35:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-23 22:35:19,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:19,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:19,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:19,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:19,851 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:19,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash -972857566, now seen corresponding path program 1 times [2023-11-23 22:35:19,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:19,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146188430] [2023-11-23 22:35:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:19,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:19,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:19,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110771723] [2023-11-23 22:35:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:19,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:19,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:19,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:19,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:35:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:20,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:35:20,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:35:20,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:35:20,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146188430] [2023-11-23 22:35:20,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110771723] [2023-11-23 22:35:20,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110771723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:20,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:20,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:35:20,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717486404] [2023-11-23 22:35:20,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:20,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:20,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:20,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:20,634 INFO L87 Difference]: Start difference. First operand 597 states and 884 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:35:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:20,954 INFO L93 Difference]: Finished difference Result 941 states and 1386 transitions. [2023-11-23 22:35:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-11-23 22:35:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:20,959 INFO L225 Difference]: With dead ends: 941 [2023-11-23 22:35:20,959 INFO L226 Difference]: Without dead ends: 464 [2023-11-23 22:35:20,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:20,961 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 787 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:20,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 819 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:35:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-11-23 22:35:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2023-11-23 22:35:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 452 states have (on average 1.4668141592920354) internal successors, (663), 458 states have internal predecessors, (663), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 22:35:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 679 transitions. [2023-11-23 22:35:20,982 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 679 transitions. Word has length 152 [2023-11-23 22:35:20,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:20,983 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 679 transitions. [2023-11-23 22:35:20,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:35:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 679 transitions. [2023-11-23 22:35:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-23 22:35:20,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:20,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:21,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-23 22:35:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:21,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:21,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1710908299, now seen corresponding path program 1 times [2023-11-23 22:35:21,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:21,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898703585] [2023-11-23 22:35:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:21,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:21,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:21,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283142536] [2023-11-23 22:35:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:21,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:21,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:21,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:35:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:21,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:35:21,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:21,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:35:21,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 22:35:21,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:35:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:35:22,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:35:22,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898703585] [2023-11-23 22:35:22,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283142536] [2023-11-23 22:35:22,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283142536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:22,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:35:22,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-23 22:35:22,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858059549] [2023-11-23 22:35:22,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:22,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:35:22,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:22,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:35:22,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:35:22,247 INFO L87 Difference]: Start difference. First operand 464 states and 679 transitions. Second operand has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:35:22,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:22,668 INFO L93 Difference]: Finished difference Result 1504 states and 2200 transitions. [2023-11-23 22:35:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:35:22,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 162 [2023-11-23 22:35:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:22,678 INFO L225 Difference]: With dead ends: 1504 [2023-11-23 22:35:22,678 INFO L226 Difference]: Without dead ends: 1342 [2023-11-23 22:35:22,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 312 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:35:22,682 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1625 mSDsluCounter, 2952 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1639 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:22,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1639 Valid, 3459 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:35:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2023-11-23 22:35:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 858. [2023-11-23 22:35:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 842 states have (on average 1.4524940617577198) internal successors, (1223), 848 states have internal predecessors, (1223), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 22:35:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1245 transitions. [2023-11-23 22:35:22,729 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1245 transitions. Word has length 162 [2023-11-23 22:35:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:22,730 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1245 transitions. [2023-11-23 22:35:22,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:35:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1245 transitions. [2023-11-23 22:35:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-23 22:35:22,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:22,739 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:22,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:22,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:22,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:22,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash -668440555, now seen corresponding path program 1 times [2023-11-23 22:35:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:22,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124810269] [2023-11-23 22:35:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:22,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:23,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:23,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411286033] [2023-11-23 22:35:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:23,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:23,121 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:23,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:35:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:24,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:35:24,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:24,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:35:24,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 22:35:24,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 22:35:24,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 22:35:24,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 22:35:24,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:35:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:35:24,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:35:25,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:25,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124810269] [2023-11-23 22:35:25,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:25,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411286033] [2023-11-23 22:35:25,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411286033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:25,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:35:25,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-23 22:35:25,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352985136] [2023-11-23 22:35:25,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:35:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:25,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:35:25,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:35:25,576 INFO L87 Difference]: Start difference. First operand 858 states and 1245 transitions. Second operand has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:35:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:26,501 INFO L93 Difference]: Finished difference Result 2989 states and 4381 transitions. [2023-11-23 22:35:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 22:35:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 390 [2023-11-23 22:35:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:26,521 INFO L225 Difference]: With dead ends: 2989 [2023-11-23 22:35:26,521 INFO L226 Difference]: Without dead ends: 2827 [2023-11-23 22:35:26,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 762 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2023-11-23 22:35:26,523 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 4996 mSDsluCounter, 5818 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5031 SdHoareTripleChecker+Valid, 6325 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:26,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5031 Valid, 6325 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:35:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2023-11-23 22:35:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 1878. [2023-11-23 22:35:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1856 states have (on average 1.4509698275862069) internal successors, (2693), 1862 states have internal predecessors, (2693), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 22:35:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2727 transitions. [2023-11-23 22:35:26,621 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2727 transitions. Word has length 390 [2023-11-23 22:35:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:26,622 INFO L495 AbstractCegarLoop]: Abstraction has 1878 states and 2727 transitions. [2023-11-23 22:35:26,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.53333333333333) internal successors, (698), 15 states have internal predecessors, (698), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:35:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2727 transitions. [2023-11-23 22:35:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2023-11-23 22:35:26,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:26,654 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:26,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:26,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:35:26,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:26,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1366225067, now seen corresponding path program 2 times [2023-11-23 22:35:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:26,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060589906] [2023-11-23 22:35:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:26,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:27,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:27,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343286382] [2023-11-23 22:35:27,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:35:27,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:27,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:27,271 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:27,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:35:28,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:35:28,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:28,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 22:35:28,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:28,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:35:28,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:35:28,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 23 [2023-11-23 22:35:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-23 22:35:28,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:35:28,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060589906] [2023-11-23 22:35:28,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:28,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343286382] [2023-11-23 22:35:28,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343286382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:28,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:28,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 22:35:28,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418229452] [2023-11-23 22:35:28,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:28,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:35:28,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:35:28,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:35:28,901 INFO L87 Difference]: Start difference. First operand 1878 states and 2727 transitions. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:35:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:30,071 INFO L93 Difference]: Finished difference Result 2235 states and 3245 transitions. [2023-11-23 22:35:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:35:30,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 846 [2023-11-23 22:35:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:30,085 INFO L225 Difference]: With dead ends: 2235 [2023-11-23 22:35:30,085 INFO L226 Difference]: Without dead ends: 2074 [2023-11-23 22:35:30,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:35:30,087 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 513 mSDsluCounter, 2421 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:30,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 2937 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 22:35:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2023-11-23 22:35:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1915. [2023-11-23 22:35:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1893 states have (on average 1.444796619123085) internal successors, (2735), 1899 states have internal predecessors, (2735), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 22:35:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2769 transitions. [2023-11-23 22:35:30,172 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2769 transitions. Word has length 846 [2023-11-23 22:35:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:30,174 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 2769 transitions. [2023-11-23 22:35:30,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:35:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2769 transitions. [2023-11-23 22:35:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2023-11-23 22:35:30,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:30,212 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:30,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 22:35:30,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:30,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1793757615, now seen corresponding path program 1 times [2023-11-23 22:35:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:30,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964623154] [2023-11-23 22:35:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:30,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:30,814 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521887574] [2023-11-23 22:35:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:30,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:30,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:30,816 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:30,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:35:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:32,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 4074 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:35:32,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3425 trivial. 0 not checked. [2023-11-23 22:35:32,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:35:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964623154] [2023-11-23 22:35:32,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:35:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521887574] [2023-11-23 22:35:32,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521887574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:32,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:32,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:32,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992015903] [2023-11-23 22:35:32,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:32,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:32,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:32,731 INFO L87 Difference]: Start difference. First operand 1915 states and 2769 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:35:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:32,935 INFO L93 Difference]: Finished difference Result 2190 states and 3179 transitions. [2023-11-23 22:35:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 846 [2023-11-23 22:35:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:32,949 INFO L225 Difference]: With dead ends: 2190 [2023-11-23 22:35:32,949 INFO L226 Difference]: Without dead ends: 2026 [2023-11-23 22:35:32,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 842 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:32,951 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 140 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:32,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1858 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:35:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-11-23 22:35:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1938. [2023-11-23 22:35:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1916 states have (on average 1.4389352818371608) internal successors, (2757), 1922 states have internal predecessors, (2757), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 22:35:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2791 transitions. [2023-11-23 22:35:33,068 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2791 transitions. Word has length 846 [2023-11-23 22:35:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:33,070 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2791 transitions. [2023-11-23 22:35:33,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:35:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2791 transitions. [2023-11-23 22:35:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2023-11-23 22:35:33,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:33,082 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:33,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:33,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:35:33,297 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:33,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash -893887797, now seen corresponding path program 1 times [2023-11-23 22:35:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:33,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17829468] [2023-11-23 22:35:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:33,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:33,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:35:33,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454176070] [2023-11-23 22:35:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:33,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:33,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:33,623 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:33,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a075aa48-944e-46f5-821e-077f77c29252/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:35:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:46,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 4079 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-23 22:35:46,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:46,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:35:47,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 22:35:47,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 22:35:47,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 22:35:47,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 22:35:47,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-23 22:35:48,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:35:48,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 27 [2023-11-23 22:35:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3425 backedges. 1855 proven. 582 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2023-11-23 22:35:48,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:49,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:35:49,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28