./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI --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 be29e8161f6a6b8e8b181f151bf5388e6a9e3237ae426f572d4ceda403cee9b8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:04:01,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:04:01,680 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:04:01,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:04:01,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:04:01,715 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:04:01,716 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:04:01,717 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:04:01,718 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:04:01,718 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:04:01,719 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:04:01,720 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:04:01,721 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:04:01,721 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:04:01,722 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:04:01,722 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:04:01,723 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:04:01,724 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:04:01,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:04:01,725 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:04:01,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:04:01,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:04:01,727 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:04:01,728 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:04:01,728 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:04:01,729 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:04:01,729 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:04:01,730 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:04:01,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:04:01,731 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:04:01,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:04:01,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:01,733 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:04:01,733 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:04:01,733 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:04:01,734 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:04:01,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:04:01,735 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:04:01,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:04:01,735 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:04:01,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:04:01,736 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:04:01,736 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_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be29e8161f6a6b8e8b181f151bf5388e6a9e3237ae426f572d4ceda403cee9b8 [2023-11-24 22:04:02,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:04:02,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:04:02,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:04:02,028 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:04:02,029 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:04:02,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test3-2.i [2023-11-24 22:04:05,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:04:05,546 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:04:05,546 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test3-2.i [2023-11-24 22:04:05,567 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/data/06acc4e5a/409adfe5073540d18e2a01ceac551b6d/FLAG008ae234a [2023-11-24 22:04:05,584 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/data/06acc4e5a/409adfe5073540d18e2a01ceac551b6d [2023-11-24 22:04:05,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:04:05,588 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:04:05,589 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:05,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:04:05,595 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:04:05,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:05" (1/1) ... [2023-11-24 22:04:05,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d936c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:05, skipping insertion in model container [2023-11-24 22:04:05,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:05" (1/1) ... [2023-11-24 22:04:05,664 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:04:06,107 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_975a89e5-ebc5-426e-8709-28b9309ec0fc/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test3-2.i[33519,33532] [2023-11-24 22:04:06,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:06,337 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:04:06,378 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_975a89e5-ebc5-426e-8709-28b9309ec0fc/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test3-2.i[33519,33532] [2023-11-24 22:04:06,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:06,539 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:04:06,547 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:04:06,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06 WrapperNode [2023-11-24 22:04:06,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:06,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:04:06,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:04:06,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:04:06,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:06,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:06,754 INFO L138 Inliner]: procedures = 177, calls = 332, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1502 [2023-11-24 22:04:06,768 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:04:06,769 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:04:06,769 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:04:06,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:04:06,783 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:06,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:06,798 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:06,963 INFO L175 MemorySlicer]: Split 307 memory accesses to 4 slices as follows [2, 34, 266, 5]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 63 writes are split as follows [0, 4, 58, 1]. [2023-11-24 22:04:06,963 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:06,964 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:07,016 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:07,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:07,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:07,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:07,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:04:07,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:04:07,065 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:04:07,065 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:04:07,066 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (1/1) ... [2023-11-24 22:04:07,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:07,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:07,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:04:07,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:04:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:04:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:04:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:04:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:04:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 22:04:07,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 22:04:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:04:07,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:04:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:04:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:04:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-24 22:04:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-24 22:04:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-24 22:04:07,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-24 22:04:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-24 22:04:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-24 22:04:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-24 22:04:07,155 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-24 22:04:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:04:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:04:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 22:04:07,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 22:04:07,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 22:04:07,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 22:04:07,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:04:07,157 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-24 22:04:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 22:04:07,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 22:04:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 22:04:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 22:04:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:04:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:04:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:04:07,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:04:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:04:07,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:04:07,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:04:07,486 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:04:07,488 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:04:09,405 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:04:09,463 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:04:09,463 INFO L309 CfgBuilder]: Removed 72 assume(true) statements. [2023-11-24 22:04:09,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:09 BoogieIcfgContainer [2023-11-24 22:04:09,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:04:09,470 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:04:09,470 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:04:09,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:04:09,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:04:05" (1/3) ... [2023-11-24 22:04:09,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152ebf81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:04:09, skipping insertion in model container [2023-11-24 22:04:09,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:06" (2/3) ... [2023-11-24 22:04:09,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152ebf81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:04:09, skipping insertion in model container [2023-11-24 22:04:09,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:09" (3/3) ... [2023-11-24 22:04:09,481 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_nondet_test3-2.i [2023-11-24 22:04:09,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:04:09,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:04:09,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:04:09,590 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;@658b4ed4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:04:09,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:04:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 380 states have (on average 1.7) internal successors, (646), 382 states have internal predecessors, (646), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 22:04:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 22:04:09,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:09,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:09,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:09,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash -605027704, now seen corresponding path program 1 times [2023-11-24 22:04:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:09,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811319105] [2023-11-24 22:04:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:09,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:09,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811319105] [2023-11-24 22:04:09,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811319105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:09,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:09,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:04:09,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947375689] [2023-11-24 22:04:09,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:09,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:04:09,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:04:09,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:04:09,856 INFO L87 Difference]: Start difference. First operand has 389 states, 380 states have (on average 1.7) internal successors, (646), 382 states have internal predecessors, (646), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:10,006 INFO L93 Difference]: Finished difference Result 776 states and 1311 transitions. [2023-11-24 22:04:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:04:10,009 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 22:04:10,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:10,030 INFO L225 Difference]: With dead ends: 776 [2023-11-24 22:04:10,031 INFO L226 Difference]: Without dead ends: 353 [2023-11-24 22:04:10,040 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 [2023-11-24 22:04:10,045 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:10,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 574 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:04:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-24 22:04:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2023-11-24 22:04:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 345 states have (on average 1.5043478260869565) internal successors, (519), 346 states have internal predecessors, (519), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 22:04:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 529 transitions. [2023-11-24 22:04:10,140 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 529 transitions. Word has length 11 [2023-11-24 22:04:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:10,141 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 529 transitions. [2023-11-24 22:04:10,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 529 transitions. [2023-11-24 22:04:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 22:04:10,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:10,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:10,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:04:10,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:10,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1500786045, now seen corresponding path program 1 times [2023-11-24 22:04:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:10,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614452209] [2023-11-24 22:04:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:10,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:10,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614452209] [2023-11-24 22:04:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614452209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:10,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:10,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:04:10,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132109501] [2023-11-24 22:04:10,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:10,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:04:10,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:04:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:04:10,372 INFO L87 Difference]: Start difference. First operand 353 states and 529 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:10,831 INFO L93 Difference]: Finished difference Result 963 states and 1463 transitions. [2023-11-24 22:04:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:04:10,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 22:04:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:10,837 INFO L225 Difference]: With dead ends: 963 [2023-11-24 22:04:10,838 INFO L226 Difference]: Without dead ends: 610 [2023-11-24 22:04:10,839 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 [2023-11-24 22:04:10,840 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 401 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:10,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1493 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 22:04:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-11-24 22:04:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 609. [2023-11-24 22:04:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 600 states have (on average 1.53) internal successors, (918), 602 states have internal predecessors, (918), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:04:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 930 transitions. [2023-11-24 22:04:10,874 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 930 transitions. Word has length 13 [2023-11-24 22:04:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:10,874 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 930 transitions. [2023-11-24 22:04:10,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 930 transitions. [2023-11-24 22:04:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 22:04:10,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:10,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:10,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:04:10,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:10,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash -844814039, now seen corresponding path program 1 times [2023-11-24 22:04:10,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:10,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484144800] [2023-11-24 22:04:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:10,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:11,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:11,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484144800] [2023-11-24 22:04:11,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484144800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:11,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:11,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:04:11,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045168598] [2023-11-24 22:04:11,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:11,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:04:11,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:11,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:04:11,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:04:11,264 INFO L87 Difference]: Start difference. First operand 609 states and 930 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:11,388 INFO L93 Difference]: Finished difference Result 861 states and 1300 transitions. [2023-11-24 22:04:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:04:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 22:04:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:11,394 INFO L225 Difference]: With dead ends: 861 [2023-11-24 22:04:11,395 INFO L226 Difference]: Without dead ends: 545 [2023-11-24 22:04:11,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:04:11,400 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 99 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:11,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1215 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:04:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-11-24 22:04:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 543. [2023-11-24 22:04:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 534 states have (on average 1.4644194756554307) internal successors, (782), 536 states have internal predecessors, (782), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:04:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 794 transitions. [2023-11-24 22:04:11,435 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 794 transitions. Word has length 67 [2023-11-24 22:04:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:11,436 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 794 transitions. [2023-11-24 22:04:11,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 794 transitions. [2023-11-24 22:04:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 22:04:11,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:11,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:11,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:04:11,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:11,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1062139723, now seen corresponding path program 1 times [2023-11-24 22:04:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:11,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646537831] [2023-11-24 22:04:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:11,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:12,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:12,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646537831] [2023-11-24 22:04:12,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646537831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:12,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:12,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:04:12,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993523090] [2023-11-24 22:04:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:12,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:04:12,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:04:12,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:04:12,059 INFO L87 Difference]: Start difference. First operand 543 states and 794 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:12,264 INFO L93 Difference]: Finished difference Result 1019 states and 1452 transitions. [2023-11-24 22:04:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:04:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 22:04:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:12,271 INFO L225 Difference]: With dead ends: 1019 [2023-11-24 22:04:12,272 INFO L226 Difference]: Without dead ends: 766 [2023-11-24 22:04:12,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:04:12,284 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 431 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:12,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 2346 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:04:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2023-11-24 22:04:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 542. [2023-11-24 22:04:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 533 states have (on average 1.4634146341463414) internal successors, (780), 535 states have internal predecessors, (780), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:04:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 792 transitions. [2023-11-24 22:04:12,313 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 792 transitions. Word has length 67 [2023-11-24 22:04:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:12,313 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 792 transitions. [2023-11-24 22:04:12,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 792 transitions. [2023-11-24 22:04:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 22:04:12,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:12,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:12,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:04:12,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:12,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:12,319 INFO L85 PathProgramCache]: Analyzing trace with hash 920611950, now seen corresponding path program 1 times [2023-11-24 22:04:12,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:12,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21087818] [2023-11-24 22:04:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:12,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:12,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633723898] [2023-11-24 22:04:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:12,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:12,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:04:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:12,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:04:12,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:04:12,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:12,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:12,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21087818] [2023-11-24 22:04:12,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:12,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633723898] [2023-11-24 22:04:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633723898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:12,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:12,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:04:12,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15010502] [2023-11-24 22:04:12,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:12,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:12,892 INFO L87 Difference]: Start difference. First operand 542 states and 792 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:12,993 INFO L93 Difference]: Finished difference Result 1073 states and 1563 transitions. [2023-11-24 22:04:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 102 [2023-11-24 22:04:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:12,998 INFO L225 Difference]: With dead ends: 1073 [2023-11-24 22:04:12,998 INFO L226 Difference]: Without dead ends: 584 [2023-11-24 22:04:12,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:13,000 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 10 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:13,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 850 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:04:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-24 22:04:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2023-11-24 22:04:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 573 states have (on average 1.431064572425829) internal successors, (820), 575 states have internal predecessors, (820), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:04:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 832 transitions. [2023-11-24 22:04:13,023 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 832 transitions. Word has length 102 [2023-11-24 22:04:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:13,024 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 832 transitions. [2023-11-24 22:04:13,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 832 transitions. [2023-11-24 22:04:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 22:04:13,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:13,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:13,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:13,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:13,234 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:13,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1636271126, now seen corresponding path program 1 times [2023-11-24 22:04:13,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:13,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516713128] [2023-11-24 22:04:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:13,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:13,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107490474] [2023-11-24 22:04:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:13,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:13,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:13,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:13,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:04:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:13,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:04:13,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:04:13,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:13,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:13,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516713128] [2023-11-24 22:04:13,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:13,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107490474] [2023-11-24 22:04:13,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107490474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:13,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:13,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:04:13,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856612208] [2023-11-24 22:04:13,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:13,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:04:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:13,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:04:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:04:13,759 INFO L87 Difference]: Start difference. First operand 582 states and 832 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:13,877 INFO L93 Difference]: Finished difference Result 1067 states and 1528 transitions. [2023-11-24 22:04:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:04:13,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 102 [2023-11-24 22:04:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:13,881 INFO L225 Difference]: With dead ends: 1067 [2023-11-24 22:04:13,882 INFO L226 Difference]: Without dead ends: 556 [2023-11-24 22:04:13,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:04:13,884 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 165 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:13,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1123 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:04:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-24 22:04:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 554. [2023-11-24 22:04:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 545 states have (on average 1.4275229357798165) internal successors, (778), 547 states have internal predecessors, (778), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:04:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 790 transitions. [2023-11-24 22:04:13,905 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 790 transitions. Word has length 102 [2023-11-24 22:04:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:13,905 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 790 transitions. [2023-11-24 22:04:13,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:13,906 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 790 transitions. [2023-11-24 22:04:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 22:04:13,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:13,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:13,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:14,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:14,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:14,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:14,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1744845048, now seen corresponding path program 1 times [2023-11-24 22:04:14,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:14,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073184216] [2023-11-24 22:04:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:14,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:14,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:14,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317609997] [2023-11-24 22:04:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:14,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:14,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:14,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:14,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:04:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:14,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 22:04:14,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:14,660 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 [2023-11-24 22:04:14,671 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 7 treesize of output 3 [2023-11-24 22:04:14,885 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 [2023-11-24 22:04:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:04:14,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:04:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:04:15,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:15,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073184216] [2023-11-24 22:04:15,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:15,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317609997] [2023-11-24 22:04:15,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317609997] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 22:04:15,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:04:15,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-11-24 22:04:15,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629683839] [2023-11-24 22:04:15,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:04:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:04:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-24 22:04:15,197 INFO L87 Difference]: Start difference. First operand 554 states and 790 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:15,351 INFO L93 Difference]: Finished difference Result 726 states and 1027 transitions. [2023-11-24 22:04:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:04:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 102 [2023-11-24 22:04:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:15,357 INFO L225 Difference]: With dead ends: 726 [2023-11-24 22:04:15,357 INFO L226 Difference]: Without dead ends: 716 [2023-11-24 22:04:15,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-24 22:04:15,359 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 520 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:15,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1301 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:04:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-11-24 22:04:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 556. [2023-11-24 22:04:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 547 states have (on average 1.4259597806215722) internal successors, (780), 549 states have internal predecessors, (780), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 22:04:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 792 transitions. [2023-11-24 22:04:15,387 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 792 transitions. Word has length 102 [2023-11-24 22:04:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:15,388 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 792 transitions. [2023-11-24 22:04:15,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 792 transitions. [2023-11-24 22:04:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-24 22:04:15,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:15,391 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] [2023-11-24 22:04:15,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:15,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:15,600 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:15,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash -525867670, now seen corresponding path program 1 times [2023-11-24 22:04:15,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:15,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751137585] [2023-11-24 22:04:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:15,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:15,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653122491] [2023-11-24 22:04:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:15,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:15,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:15,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:15,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:04:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:16,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 22:04:16,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:04:16,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:16,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:16,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751137585] [2023-11-24 22:04:16,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:16,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653122491] [2023-11-24 22:04:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653122491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:16,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:16,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:04:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714025548] [2023-11-24 22:04:16,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:04:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:04:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:04:16,429 INFO L87 Difference]: Start difference. First operand 556 states and 792 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:16,806 INFO L93 Difference]: Finished difference Result 1128 states and 1596 transitions. [2023-11-24 22:04:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:04:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 156 [2023-11-24 22:04:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:16,812 INFO L225 Difference]: With dead ends: 1128 [2023-11-24 22:04:16,812 INFO L226 Difference]: Without dead ends: 693 [2023-11-24 22:04:16,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:04:16,814 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 880 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:16,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 932 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 22:04:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-24 22:04:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 685. [2023-11-24 22:04:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 675 states have (on average 1.4192592592592592) internal successors, (958), 678 states have internal predecessors, (958), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:04:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 972 transitions. [2023-11-24 22:04:16,851 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 972 transitions. Word has length 156 [2023-11-24 22:04:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:16,852 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 972 transitions. [2023-11-24 22:04:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 972 transitions. [2023-11-24 22:04:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-24 22:04:16,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:16,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:16,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:17,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:17,064 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:17,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash 38254167, now seen corresponding path program 1 times [2023-11-24 22:04:17,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:17,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254379496] [2023-11-24 22:04:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:17,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:17,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:17,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768093004] [2023-11-24 22:04:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:17,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:17,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:17,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:17,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:04:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:17,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-24 22:04:17,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:17,700 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 [2023-11-24 22:04:17,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-24 22:04:17,757 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 7 treesize of output 3 [2023-11-24 22:04:18,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:04:18,451 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 46 treesize of output 26 [2023-11-24 22:04:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:04:18,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:18,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:18,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254379496] [2023-11-24 22:04:18,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:18,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768093004] [2023-11-24 22:04:18,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768093004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:18,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:18,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-24 22:04:18,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647404556] [2023-11-24 22:04:18,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:18,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 22:04:18,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 22:04:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:04:18,639 INFO L87 Difference]: Start difference. First operand 685 states and 972 transitions. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 12 states have internal predecessors, (159), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:21,521 INFO L93 Difference]: Finished difference Result 1531 states and 2153 transitions. [2023-11-24 22:04:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 22:04:21,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 12 states have internal predecessors, (159), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 166 [2023-11-24 22:04:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:21,527 INFO L225 Difference]: With dead ends: 1531 [2023-11-24 22:04:21,527 INFO L226 Difference]: Without dead ends: 928 [2023-11-24 22:04:21,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-11-24 22:04:21,530 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 1581 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 2611 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:21,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1587 Valid, 2611 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-24 22:04:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2023-11-24 22:04:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 717. [2023-11-24 22:04:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 707 states have (on average 1.4073550212164074) internal successors, (995), 710 states have internal predecessors, (995), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:04:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1009 transitions. [2023-11-24 22:04:21,572 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1009 transitions. Word has length 166 [2023-11-24 22:04:21,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:21,572 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 1009 transitions. [2023-11-24 22:04:21,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 12 states have internal predecessors, (159), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1009 transitions. [2023-11-24 22:04:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-24 22:04:21,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:21,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:21,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:21,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:21,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:21,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash -117726375, now seen corresponding path program 1 times [2023-11-24 22:04:21,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:21,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008440023] [2023-11-24 22:04:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:21,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:21,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586159703] [2023-11-24 22:04:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:21,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:21,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:21,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:04:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:22,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:04:22,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:04:22,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:22,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008440023] [2023-11-24 22:04:22,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586159703] [2023-11-24 22:04:22,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586159703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:22,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:22,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 22:04:22,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327555850] [2023-11-24 22:04:22,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:22,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:04:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:04:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:04:22,393 INFO L87 Difference]: Start difference. First operand 717 states and 1009 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:22,546 INFO L93 Difference]: Finished difference Result 1520 states and 2179 transitions. [2023-11-24 22:04:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:04:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 166 [2023-11-24 22:04:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:22,552 INFO L225 Difference]: With dead ends: 1520 [2023-11-24 22:04:22,553 INFO L226 Difference]: Without dead ends: 905 [2023-11-24 22:04:22,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:04:22,555 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 145 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:22,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1276 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:04:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-11-24 22:04:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 740. [2023-11-24 22:04:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 730 states have (on average 1.393150684931507) internal successors, (1017), 733 states have internal predecessors, (1017), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:04:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1031 transitions. [2023-11-24 22:04:22,596 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1031 transitions. Word has length 166 [2023-11-24 22:04:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:22,596 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1031 transitions. [2023-11-24 22:04:22,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1031 transitions. [2023-11-24 22:04:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-24 22:04:22,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:22,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:22,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:22,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:22,807 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:22,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash -372500775, now seen corresponding path program 1 times [2023-11-24 22:04:22,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:22,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803265075] [2023-11-24 22:04:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:22,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:22,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:22,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975805645] [2023-11-24 22:04:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:22,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:22,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:22,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:04:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:23,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-24 22:04:23,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:23,415 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 [2023-11-24 22:04:23,516 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 7 treesize of output 3 [2023-11-24 22:04:23,663 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 [2023-11-24 22:04:24,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:04:24,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 23 [2023-11-24 22:04:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:04:24,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:04:24,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:04:24,883 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 39 treesize of output 1 [2023-11-24 22:04:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:04:24,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:24,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803265075] [2023-11-24 22:04:24,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:24,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975805645] [2023-11-24 22:04:24,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975805645] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 22:04:24,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:04:24,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2023-11-24 22:04:24,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306280138] [2023-11-24 22:04:24,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 22:04:24,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 22:04:24,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-11-24 22:04:24,897 INFO L87 Difference]: Start difference. First operand 740 states and 1031 transitions. Second operand has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:28,065 INFO L93 Difference]: Finished difference Result 1434 states and 1985 transitions. [2023-11-24 22:04:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 22:04:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-11-24 22:04:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:28,073 INFO L225 Difference]: With dead ends: 1434 [2023-11-24 22:04:28,073 INFO L226 Difference]: Without dead ends: 1055 [2023-11-24 22:04:28,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2023-11-24 22:04:28,075 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 592 mSDsluCounter, 3022 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:28,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 3479 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 22:04:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2023-11-24 22:04:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 769. [2023-11-24 22:04:28,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 759 states have (on average 1.383399209486166) internal successors, (1050), 762 states have internal predecessors, (1050), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:04:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1064 transitions. [2023-11-24 22:04:28,143 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1064 transitions. Word has length 167 [2023-11-24 22:04:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:28,143 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 1064 transitions. [2023-11-24 22:04:28,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1064 transitions. [2023-11-24 22:04:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-24 22:04:28,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:28,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:28,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:28,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:28,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:28,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash 520985563, now seen corresponding path program 1 times [2023-11-24 22:04:28,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:28,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917854446] [2023-11-24 22:04:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:28,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:28,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212577321] [2023-11-24 22:04:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:28,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:28,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:28,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:28,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 22:04:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:29,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:04:29,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:04:29,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:29,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:29,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917854446] [2023-11-24 22:04:29,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:29,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212577321] [2023-11-24 22:04:29,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212577321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:29,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:29,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:04:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536809049] [2023-11-24 22:04:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:29,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:29,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:29,033 INFO L87 Difference]: Start difference. First operand 769 states and 1064 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:29,128 INFO L93 Difference]: Finished difference Result 1151 states and 1594 transitions. [2023-11-24 22:04:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-11-24 22:04:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:29,136 INFO L225 Difference]: With dead ends: 1151 [2023-11-24 22:04:29,136 INFO L226 Difference]: Without dead ends: 772 [2023-11-24 22:04:29,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:29,138 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 2 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:29,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 857 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:04:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-11-24 22:04:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 769. [2023-11-24 22:04:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 759 states have (on average 1.3675889328063242) internal successors, (1038), 762 states have internal predecessors, (1038), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:04:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1052 transitions. [2023-11-24 22:04:29,204 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1052 transitions. Word has length 167 [2023-11-24 22:04:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:29,205 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 1052 transitions. [2023-11-24 22:04:29,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1052 transitions. [2023-11-24 22:04:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-24 22:04:29,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:29,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:29,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:29,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:29,416 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:29,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1876207647, now seen corresponding path program 1 times [2023-11-24 22:04:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:29,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202862110] [2023-11-24 22:04:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:29,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:29,476 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:29,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303115490] [2023-11-24 22:04:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:29,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:29,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:29,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:29,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 22:04:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:29,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 22:04:29,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:04:30,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:30,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:04:30,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202862110] [2023-11-24 22:04:30,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:04:30,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303115490] [2023-11-24 22:04:30,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303115490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:30,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:30,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:04:30,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813860346] [2023-11-24 22:04:30,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:30,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:04:30,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:04:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:04:30,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:04:30,036 INFO L87 Difference]: Start difference. First operand 769 states and 1052 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:04:30,142 INFO L93 Difference]: Finished difference Result 1130 states and 1552 transitions. [2023-11-24 22:04:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:04:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-11-24 22:04:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:04:30,148 INFO L225 Difference]: With dead ends: 1130 [2023-11-24 22:04:30,148 INFO L226 Difference]: Without dead ends: 751 [2023-11-24 22:04:30,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:04:30,150 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 78 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:04:30,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1192 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:04:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-24 22:04:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2023-11-24 22:04:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 741 states have (on average 1.3711201079622133) internal successors, (1016), 744 states have internal predecessors, (1016), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 22:04:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1030 transitions. [2023-11-24 22:04:30,240 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1030 transitions. Word has length 167 [2023-11-24 22:04:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:04:30,241 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 1030 transitions. [2023-11-24 22:04:30,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:04:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1030 transitions. [2023-11-24 22:04:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-24 22:04:30,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:04:30,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:04:30,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:04:30,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 22:04:30,453 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:04:30,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1445860636, now seen corresponding path program 1 times [2023-11-24 22:04:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:04:30,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344253043] [2023-11-24 22:04:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:04:30,508 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 22:04:30,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549436042] [2023-11-24 22:04:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:30,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:04:30,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:30,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:04:30,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_975a89e5-ebc5-426e-8709-28b9309ec0fc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:04:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:31,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 22:04:31,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:31,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:04:31,338 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 44 treesize of output 22 [2023-11-24 22:04:39,938 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-24 22:04:45,152 WARN L293 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-24 22:04:53,195 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-24 22:05:01,237 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)