./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-76.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_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-76.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme --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 f602e0f7734a1905046e2fba128f181bd659d39499d3aad0dd0d24704f376d3a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:50:32,932 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:50:33,032 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:50:33,038 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:50:33,039 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:50:33,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:50:33,071 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:50:33,072 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:50:33,073 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:50:33,074 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:50:33,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:50:33,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:50:33,076 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:50:33,077 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:50:33,077 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:50:33,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:50:33,079 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:50:33,080 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:50:33,080 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:50:33,081 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:50:33,081 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:50:33,086 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:50:33,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:50:33,087 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:50:33,088 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:50:33,088 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:50:33,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:50:33,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:50:33,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:50:33,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:50:33,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:50:33,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:33,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:50:33,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:50:33,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:50:33,095 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:50:33,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:50:33,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:50:33,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:50:33,096 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:50:33,097 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:50:33,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:50:33,097 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_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f602e0f7734a1905046e2fba128f181bd659d39499d3aad0dd0d24704f376d3a [2023-11-26 11:50:33,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:50:33,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:50:33,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:50:33,453 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:50:33,454 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:50:33,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-76.i [2023-11-26 11:50:36,823 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:50:37,143 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:50:37,144 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-76.i [2023-11-26 11:50:37,162 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/data/1917b30bf/75beac4488614b88b21d5098d415dcc8/FLAGf00d0e85a [2023-11-26 11:50:37,191 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/data/1917b30bf/75beac4488614b88b21d5098d415dcc8 [2023-11-26 11:50:37,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:50:37,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:50:37,211 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:37,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:50:37,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:50:37,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:37,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1873cd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37, skipping insertion in model container [2023-11-26 11:50:37,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:37,299 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:50:37,462 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_973b6588-4b21-4307-9b63-25c7262fe0eb/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-76.i[916,929] [2023-11-26 11:50:37,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:37,769 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:50:37,782 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_973b6588-4b21-4307-9b63-25c7262fe0eb/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-76.i[916,929] [2023-11-26 11:50:37,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:37,979 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:50:37,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37 WrapperNode [2023-11-26 11:50:37,980 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:37,982 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:37,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:50:37,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:50:37,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,157 INFO L138 Inliner]: procedures = 26, calls = 127, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 962 [2023-11-26 11:50:38,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:38,158 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:50:38,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:50:38,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:50:38,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,186 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,232 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:50:38,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,269 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:50:38,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:50:38,307 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:50:38,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:50:38,308 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (1/1) ... [2023-11-26 11:50:38,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:38,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:38,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:50:38,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:50:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:50:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:50:38,389 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:50:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:50:38,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:50:38,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:50:38,548 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:50:38,551 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:50:39,820 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:50:39,890 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:50:39,890 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:50:39,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:39 BoogieIcfgContainer [2023-11-26 11:50:39,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:50:39,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:50:39,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:50:39,897 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:50:39,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:50:37" (1/3) ... [2023-11-26 11:50:39,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256fc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:39, skipping insertion in model container [2023-11-26 11:50:39,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:37" (2/3) ... [2023-11-26 11:50:39,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256fc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:39, skipping insertion in model container [2023-11-26 11:50:39,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:39" (3/3) ... [2023-11-26 11:50:39,901 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-76.i [2023-11-26 11:50:39,923 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:50:39,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:50:40,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:50:40,010 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;@2ff4ee71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:50:40,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:50:40,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 352 states, 235 states have (on average 1.651063829787234) internal successors, (388), 236 states have internal predecessors, (388), 114 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-26 11:50:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2023-11-26 11:50:40,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:40,079 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:40,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:40,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:40,087 INFO L85 PathProgramCache]: Analyzing trace with hash 492605909, now seen corresponding path program 1 times [2023-11-26 11:50:40,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691537461] [2023-11-26 11:50:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:40,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:40,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:40,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691537461] [2023-11-26 11:50:40,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:50:40,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444539532] [2023-11-26 11:50:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:40,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:40,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:40,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:40,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:41,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:50:41,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 25538 trivial. 0 not checked. [2023-11-26 11:50:41,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:41,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444539532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:41,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:41,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118403771] [2023-11-26 11:50:41,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:50:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:50:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:50:41,411 INFO L87 Difference]: Start difference. First operand has 352 states, 235 states have (on average 1.651063829787234) internal successors, (388), 236 states have internal predecessors, (388), 114 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (114), 2 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 2 states have call successors, (114) [2023-11-26 11:50:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:41,507 INFO L93 Difference]: Finished difference Result 698 states and 1338 transitions. [2023-11-26 11:50:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:50:41,510 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (114), 2 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 2 states have call successors, (114) Word has length 723 [2023-11-26 11:50:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:41,524 INFO L225 Difference]: With dead ends: 698 [2023-11-26 11:50:41,524 INFO L226 Difference]: Without dead ends: 347 [2023-11-26 11:50:41,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:50:41,536 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:41,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 596 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-26 11:50:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2023-11-26 11:50:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 231 states have (on average 1.606060606060606) internal successors, (371), 231 states have internal predecessors, (371), 114 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-26 11:50:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 599 transitions. [2023-11-26 11:50:41,646 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 599 transitions. Word has length 723 [2023-11-26 11:50:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:41,647 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 599 transitions. [2023-11-26 11:50:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (114), 2 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 2 states have call successors, (114) [2023-11-26 11:50:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 599 transitions. [2023-11-26 11:50:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-11-26 11:50:41,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:41,687 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:41,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:41,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:41,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:41,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1503392605, now seen corresponding path program 1 times [2023-11-26 11:50:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:41,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930746272] [2023-11-26 11:50:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:41,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:42,157 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:42,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126187866] [2023-11-26 11:50:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:42,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:42,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:42,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:42,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:50:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:42,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:50:42,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:50:42,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:42,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:42,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930746272] [2023-11-26 11:50:42,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:42,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126187866] [2023-11-26 11:50:42,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126187866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:42,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:42,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:42,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150622296] [2023-11-26 11:50:42,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:42,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:42,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:42,797 INFO L87 Difference]: Start difference. First operand 347 states and 599 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:42,899 INFO L93 Difference]: Finished difference Result 693 states and 1197 transitions. [2023-11-26 11:50:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 724 [2023-11-26 11:50:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:42,909 INFO L225 Difference]: With dead ends: 693 [2023-11-26 11:50:42,909 INFO L226 Difference]: Without dead ends: 347 [2023-11-26 11:50:42,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:42,912 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 0 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:42,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1183 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-26 11:50:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2023-11-26 11:50:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 231 states have (on average 1.6017316017316017) internal successors, (370), 231 states have internal predecessors, (370), 114 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-26 11:50:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 598 transitions. [2023-11-26 11:50:42,969 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 598 transitions. Word has length 724 [2023-11-26 11:50:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:42,974 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 598 transitions. [2023-11-26 11:50:42,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 598 transitions. [2023-11-26 11:50:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2023-11-26 11:50:42,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:42,988 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:43,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:43,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:43,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash 26484756, now seen corresponding path program 1 times [2023-11-26 11:50:43,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:43,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757008771] [2023-11-26 11:50:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:43,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:43,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:43,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026393021] [2023-11-26 11:50:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:43,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:43,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:43,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:43,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:50:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:43,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:50:44,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:50:44,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:44,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:44,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757008771] [2023-11-26 11:50:44,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:44,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026393021] [2023-11-26 11:50:44,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026393021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:44,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:44,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:44,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231266784] [2023-11-26 11:50:44,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:44,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:44,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:44,149 INFO L87 Difference]: Start difference. First operand 347 states and 598 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:44,491 INFO L93 Difference]: Finished difference Result 1363 states and 2356 transitions. [2023-11-26 11:50:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:44,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 727 [2023-11-26 11:50:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:44,503 INFO L225 Difference]: With dead ends: 1363 [2023-11-26 11:50:44,503 INFO L226 Difference]: Without dead ends: 1017 [2023-11-26 11:50:44,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:44,506 INFO L413 NwaCegarLoop]: 1301 mSDtfsCounter, 1080 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:44,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 3181 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:50:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2023-11-26 11:50:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 720. [2023-11-26 11:50:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 587 states have (on average 1.7120954003407156) internal successors, (1005), 588 states have internal predecessors, (1005), 130 states have call successors, (130), 2 states have call predecessors, (130), 2 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-26 11:50:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1265 transitions. [2023-11-26 11:50:44,648 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1265 transitions. Word has length 727 [2023-11-26 11:50:44,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:44,650 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1265 transitions. [2023-11-26 11:50:44,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1265 transitions. [2023-11-26 11:50:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2023-11-26 11:50:44,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:44,661 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:44,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:44,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:44,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:44,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1108771026, now seen corresponding path program 1 times [2023-11-26 11:50:44,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:44,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350408316] [2023-11-26 11:50:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:44,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:44,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772161543] [2023-11-26 11:50:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:44,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:44,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:44,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:45,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:50:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:45,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:50:45,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:50:45,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:45,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350408316] [2023-11-26 11:50:45,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772161543] [2023-11-26 11:50:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772161543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:45,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:45,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086821535] [2023-11-26 11:50:45,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:45,549 INFO L87 Difference]: Start difference. First operand 720 states and 1265 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:45,675 INFO L93 Difference]: Finished difference Result 2042 states and 3599 transitions. [2023-11-26 11:50:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:45,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 727 [2023-11-26 11:50:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:45,690 INFO L225 Difference]: With dead ends: 2042 [2023-11-26 11:50:45,690 INFO L226 Difference]: Without dead ends: 1323 [2023-11-26 11:50:45,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 724 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:45,714 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 377 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:45,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1981 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:45,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2023-11-26 11:50:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1320. [2023-11-26 11:50:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1125 states have (on average 1.7217777777777779) internal successors, (1937), 1128 states have internal predecessors, (1937), 190 states have call successors, (190), 4 states have call predecessors, (190), 4 states have return successors, (190), 187 states have call predecessors, (190), 190 states have call successors, (190) [2023-11-26 11:50:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2317 transitions. [2023-11-26 11:50:45,826 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2317 transitions. Word has length 727 [2023-11-26 11:50:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:45,828 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 2317 transitions. [2023-11-26 11:50:45,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2317 transitions. [2023-11-26 11:50:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2023-11-26 11:50:45,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:45,839 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:45,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:46,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:46,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:46,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash -271592083, now seen corresponding path program 1 times [2023-11-26 11:50:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839116426] [2023-11-26 11:50:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:46,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:46,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013376616] [2023-11-26 11:50:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:46,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:46,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:50:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:46,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:50:46,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:50:46,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:46,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:46,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839116426] [2023-11-26 11:50:46,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:46,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013376616] [2023-11-26 11:50:46,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013376616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:46,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:46,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:46,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960534372] [2023-11-26 11:50:46,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:46,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:46,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:46,743 INFO L87 Difference]: Start difference. First operand 1320 states and 2317 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:46,868 INFO L93 Difference]: Finished difference Result 2695 states and 4729 transitions. [2023-11-26 11:50:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 728 [2023-11-26 11:50:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:46,879 INFO L225 Difference]: With dead ends: 2695 [2023-11-26 11:50:46,879 INFO L226 Difference]: Without dead ends: 1376 [2023-11-26 11:50:46,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:46,885 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 8 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:46,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1767 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-11-26 11:50:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1336. [2023-11-26 11:50:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1141 states have (on average 1.7186678352322524) internal successors, (1961), 1144 states have internal predecessors, (1961), 190 states have call successors, (190), 4 states have call predecessors, (190), 4 states have return successors, (190), 187 states have call predecessors, (190), 190 states have call successors, (190) [2023-11-26 11:50:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2341 transitions. [2023-11-26 11:50:46,975 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2341 transitions. Word has length 728 [2023-11-26 11:50:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:46,977 INFO L495 AbstractCegarLoop]: Abstraction has 1336 states and 2341 transitions. [2023-11-26 11:50:46,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2341 transitions. [2023-11-26 11:50:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2023-11-26 11:50:46,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:46,988 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:47,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:47,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:47,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:47,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash -752672341, now seen corresponding path program 1 times [2023-11-26 11:50:47,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:47,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6117492] [2023-11-26 11:50:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:47,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:47,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:47,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670002310] [2023-11-26 11:50:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:47,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:47,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:47,300 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:47,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:50:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:47,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:50:47,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:50:49,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:49,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6117492] [2023-11-26 11:50:49,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670002310] [2023-11-26 11:50:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670002310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:49,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:49,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:49,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797617424] [2023-11-26 11:50:49,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:49,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:49,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:49,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:49,181 INFO L87 Difference]: Start difference. First operand 1336 states and 2341 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:49,791 INFO L93 Difference]: Finished difference Result 4006 states and 7021 transitions. [2023-11-26 11:50:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 728 [2023-11-26 11:50:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:49,811 INFO L225 Difference]: With dead ends: 4006 [2023-11-26 11:50:49,811 INFO L226 Difference]: Without dead ends: 2671 [2023-11-26 11:50:49,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:49,817 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 217 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:49,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1537 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:50:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2023-11-26 11:50:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2669. [2023-11-26 11:50:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2280 states have (on average 1.7175438596491228) internal successors, (3916), 2286 states have internal predecessors, (3916), 380 states have call successors, (380), 8 states have call predecessors, (380), 8 states have return successors, (380), 374 states have call predecessors, (380), 380 states have call successors, (380) [2023-11-26 11:50:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4676 transitions. [2023-11-26 11:50:50,139 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4676 transitions. Word has length 728 [2023-11-26 11:50:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:50,141 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 4676 transitions. [2023-11-26 11:50:50,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4676 transitions. [2023-11-26 11:50:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2023-11-26 11:50:50,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:50,151 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:50,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:50,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:50:50,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:50,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1145699351, now seen corresponding path program 1 times [2023-11-26 11:50:50,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:50,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870076709] [2023-11-26 11:50:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:50,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:50,476 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:50,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016125748] [2023-11-26 11:50:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:50,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:50,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:50,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:50,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:50:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:50,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:50:50,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:50:51,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:51,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:51,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870076709] [2023-11-26 11:50:51,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:51,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016125748] [2023-11-26 11:50:51,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016125748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:51,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:51,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656013770] [2023-11-26 11:50:51,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:51,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:51,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:51,073 INFO L87 Difference]: Start difference. First operand 2669 states and 4676 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:51,251 INFO L93 Difference]: Finished difference Result 7597 states and 13348 transitions. [2023-11-26 11:50:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 728 [2023-11-26 11:50:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:51,284 INFO L225 Difference]: With dead ends: 7597 [2023-11-26 11:50:51,284 INFO L226 Difference]: Without dead ends: 4929 [2023-11-26 11:50:51,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:51,294 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 317 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:51,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1411 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4929 states. [2023-11-26 11:50:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4929 to 4919. [2023-11-26 11:50:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4410 states have (on average 1.7360544217687075) internal successors, (7656), 4424 states have internal predecessors, (7656), 492 states have call successors, (492), 16 states have call predecessors, (492), 16 states have return successors, (492), 478 states have call predecessors, (492), 492 states have call successors, (492) [2023-11-26 11:50:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 8640 transitions. [2023-11-26 11:50:51,604 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 8640 transitions. Word has length 728 [2023-11-26 11:50:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:51,605 INFO L495 AbstractCegarLoop]: Abstraction has 4919 states and 8640 transitions. [2023-11-26 11:50:51,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 8640 transitions. [2023-11-26 11:50:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2023-11-26 11:50:51,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:51,618 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:51,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:51,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:50:51,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:51,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2029208341, now seen corresponding path program 1 times [2023-11-26 11:50:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554440983] [2023-11-26 11:50:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:51,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:51,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938879756] [2023-11-26 11:50:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:51,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:51,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:51,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:51,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:50:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:52,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:50:52,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:50:52,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:52,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554440983] [2023-11-26 11:50:52,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938879756] [2023-11-26 11:50:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938879756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:52,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:52,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:52,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776062503] [2023-11-26 11:50:52,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:52,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:52,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:52,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:52,509 INFO L87 Difference]: Start difference. First operand 4919 states and 8640 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:52,769 INFO L93 Difference]: Finished difference Result 13719 states and 23984 transitions. [2023-11-26 11:50:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 728 [2023-11-26 11:50:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:52,828 INFO L225 Difference]: With dead ends: 13719 [2023-11-26 11:50:52,828 INFO L226 Difference]: Without dead ends: 8801 [2023-11-26 11:50:52,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:52,841 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 265 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:52,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1415 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8801 states. [2023-11-26 11:50:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8801 to 8795. [2023-11-26 11:50:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8795 states, 8006 states have (on average 1.7142143392455658) internal successors, (13724), 8036 states have internal predecessors, (13724), 756 states have call successors, (756), 32 states have call predecessors, (756), 32 states have return successors, (756), 726 states have call predecessors, (756), 756 states have call successors, (756) [2023-11-26 11:50:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8795 states to 8795 states and 15236 transitions. [2023-11-26 11:50:53,431 INFO L78 Accepts]: Start accepts. Automaton has 8795 states and 15236 transitions. Word has length 728 [2023-11-26 11:50:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:53,433 INFO L495 AbstractCegarLoop]: Abstraction has 8795 states and 15236 transitions. [2023-11-26 11:50:53,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8795 states and 15236 transitions. [2023-11-26 11:50:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2023-11-26 11:50:53,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:53,451 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:53,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:53,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:50:53,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:53,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:53,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1952307543, now seen corresponding path program 1 times [2023-11-26 11:50:53,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:53,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082094711] [2023-11-26 11:50:53,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:53,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:53,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:53,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893362253] [2023-11-26 11:50:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:53,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:53,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:53,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:53,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:50:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:54,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:50:54,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:50:54,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:54,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:54,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082094711] [2023-11-26 11:50:54,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:54,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893362253] [2023-11-26 11:50:54,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893362253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:54,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:54,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:54,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718251898] [2023-11-26 11:50:54,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:54,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:54,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:54,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:54,530 INFO L87 Difference]: Start difference. First operand 8795 states and 15236 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:55,025 INFO L93 Difference]: Finished difference Result 24867 states and 42898 transitions. [2023-11-26 11:50:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 728 [2023-11-26 11:50:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:55,095 INFO L225 Difference]: With dead ends: 24867 [2023-11-26 11:50:55,096 INFO L226 Difference]: Without dead ends: 16073 [2023-11-26 11:50:55,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:55,115 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 441 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:55,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1177 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16073 states. [2023-11-26 11:50:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16073 to 13707. [2023-11-26 11:50:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13707 states, 12918 states have (on average 1.7275119987614183) internal successors, (22316), 12948 states have internal predecessors, (22316), 756 states have call successors, (756), 32 states have call predecessors, (756), 32 states have return successors, (756), 726 states have call predecessors, (756), 756 states have call successors, (756) [2023-11-26 11:50:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13707 states to 13707 states and 23828 transitions. [2023-11-26 11:50:55,899 INFO L78 Accepts]: Start accepts. Automaton has 13707 states and 23828 transitions. Word has length 728 [2023-11-26 11:50:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:55,900 INFO L495 AbstractCegarLoop]: Abstraction has 13707 states and 23828 transitions. [2023-11-26 11:50:55,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:50:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 13707 states and 23828 transitions. [2023-11-26 11:50:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2023-11-26 11:50:55,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:55,929 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:55,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:56,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:56,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:56,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:56,147 INFO L85 PathProgramCache]: Analyzing trace with hash 419431719, now seen corresponding path program 1 times [2023-11-26 11:50:56,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:56,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549028607] [2023-11-26 11:50:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:56,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:56,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:50:56,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497850874] [2023-11-26 11:50:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:56,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:56,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:56,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:50:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:56,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:50:56,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 8165 proven. 273 refuted. 0 times theorem prover too weak. 17326 trivial. 0 not checked. [2023-11-26 11:50:57,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 66 proven. 273 refuted. 0 times theorem prover too weak. 25425 trivial. 0 not checked. [2023-11-26 11:50:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:58,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549028607] [2023-11-26 11:50:58,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:50:58,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497850874] [2023-11-26 11:50:58,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497850874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:58,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:58,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:50:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849920212] [2023-11-26 11:50:58,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:58,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:50:58,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:58,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:50:58,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:58,515 INFO L87 Difference]: Start difference. First operand 13707 states and 23828 transitions. Second operand has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (205), 2 states have call predecessors, (205), 4 states have return successors, (206), 2 states have call predecessors, (206), 2 states have call successors, (206) [2023-11-26 11:50:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:59,778 INFO L93 Difference]: Finished difference Result 22087 states and 38375 transitions. [2023-11-26 11:50:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:50:59,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (205), 2 states have call predecessors, (205), 4 states have return successors, (206), 2 states have call predecessors, (206), 2 states have call successors, (206) Word has length 728 [2023-11-26 11:50:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:59,835 INFO L225 Difference]: With dead ends: 22087 [2023-11-26 11:50:59,835 INFO L226 Difference]: Without dead ends: 8381 [2023-11-26 11:50:59,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1458 GetRequests, 1448 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:50:59,888 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 897 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:59,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1221 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:50:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8381 states. [2023-11-26 11:51:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8381 to 7458. [2023-11-26 11:51:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 6919 states have (on average 1.7165775401069518) internal successors, (11877), 6934 states have internal predecessors, (11877), 514 states have call successors, (514), 24 states have call predecessors, (514), 24 states have return successors, (514), 499 states have call predecessors, (514), 514 states have call successors, (514) [2023-11-26 11:51:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 12905 transitions. [2023-11-26 11:51:00,326 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 12905 transitions. Word has length 728 [2023-11-26 11:51:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:00,328 INFO L495 AbstractCegarLoop]: Abstraction has 7458 states and 12905 transitions. [2023-11-26 11:51:00,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (205), 2 states have call predecessors, (205), 4 states have return successors, (206), 2 states have call predecessors, (206), 2 states have call successors, (206) [2023-11-26 11:51:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 12905 transitions. [2023-11-26 11:51:00,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 11:51:00,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:00,347 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:00,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:00,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:51:00,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:00,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1770640884, now seen corresponding path program 1 times [2023-11-26 11:51:00,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:00,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130997313] [2023-11-26 11:51:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:00,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:00,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:00,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145289553] [2023-11-26 11:51:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:00,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:00,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:00,687 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:00,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:51:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:01,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:51:01,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:51:01,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:01,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130997313] [2023-11-26 11:51:01,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145289553] [2023-11-26 11:51:01,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145289553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:01,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:01,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:01,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643207108] [2023-11-26 11:51:01,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:01,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:01,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:01,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:01,357 INFO L87 Difference]: Start difference. First operand 7458 states and 12905 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:51:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:02,184 INFO L93 Difference]: Finished difference Result 16332 states and 28044 transitions. [2023-11-26 11:51:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:02,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 729 [2023-11-26 11:51:02,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:02,265 INFO L225 Difference]: With dead ends: 16332 [2023-11-26 11:51:02,268 INFO L226 Difference]: Without dead ends: 8910 [2023-11-26 11:51:02,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:02,279 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 743 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:02,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 1480 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:51:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8910 states. [2023-11-26 11:51:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8910 to 7699. [2023-11-26 11:51:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 7088 states have (on average 1.6992099322799097) internal successors, (12044), 7107 states have internal predecessors, (12044), 581 states have call successors, (581), 29 states have call predecessors, (581), 29 states have return successors, (581), 562 states have call predecessors, (581), 581 states have call successors, (581) [2023-11-26 11:51:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 13206 transitions. [2023-11-26 11:51:02,727 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 13206 transitions. Word has length 729 [2023-11-26 11:51:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:02,728 INFO L495 AbstractCegarLoop]: Abstraction has 7699 states and 13206 transitions. [2023-11-26 11:51:02,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:51:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 13206 transitions. [2023-11-26 11:51:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 11:51:02,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:02,745 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:02,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:02,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:02,954 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:02,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:02,954 INFO L85 PathProgramCache]: Analyzing trace with hash -287964406, now seen corresponding path program 1 times [2023-11-26 11:51:02,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:02,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707002284] [2023-11-26 11:51:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:02,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:03,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:03,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742575844] [2023-11-26 11:51:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:03,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:03,033 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:03,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:51:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:03,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:51:03,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:51:03,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:03,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707002284] [2023-11-26 11:51:03,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742575844] [2023-11-26 11:51:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742575844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:03,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:03,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:03,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588964692] [2023-11-26 11:51:03,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:03,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:03,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:03,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:03,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:03,713 INFO L87 Difference]: Start difference. First operand 7699 states and 13206 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:51:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:04,254 INFO L93 Difference]: Finished difference Result 18047 states and 31001 transitions. [2023-11-26 11:51:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 729 [2023-11-26 11:51:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:04,287 INFO L225 Difference]: With dead ends: 18047 [2023-11-26 11:51:04,287 INFO L226 Difference]: Without dead ends: 10384 [2023-11-26 11:51:04,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 727 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:04,305 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 1018 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:04,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 2278 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:51:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10384 states. [2023-11-26 11:51:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10384 to 8610. [2023-11-26 11:51:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8610 states, 8153 states have (on average 1.7280755550104256) internal successors, (14089), 8162 states have internal predecessors, (14089), 431 states have call successors, (431), 25 states have call predecessors, (431), 25 states have return successors, (431), 422 states have call predecessors, (431), 431 states have call successors, (431) [2023-11-26 11:51:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8610 states to 8610 states and 14951 transitions. [2023-11-26 11:51:04,877 INFO L78 Accepts]: Start accepts. Automaton has 8610 states and 14951 transitions. Word has length 729 [2023-11-26 11:51:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:04,879 INFO L495 AbstractCegarLoop]: Abstraction has 8610 states and 14951 transitions. [2023-11-26 11:51:04,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:51:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 8610 states and 14951 transitions. [2023-11-26 11:51:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-11-26 11:51:04,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:04,903 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:04,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:05,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:51:05,118 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:05,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1213268660, now seen corresponding path program 1 times [2023-11-26 11:51:05,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:05,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547025686] [2023-11-26 11:51:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:05,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:05,221 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:05,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324689207] [2023-11-26 11:51:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:05,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:05,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:05,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:05,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:51:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:05,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:05,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 7295 proven. 282 refuted. 0 times theorem prover too weak. 18187 trivial. 0 not checked. [2023-11-26 11:51:06,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 57 proven. 282 refuted. 0 times theorem prover too weak. 25425 trivial. 0 not checked. [2023-11-26 11:51:07,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:07,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547025686] [2023-11-26 11:51:07,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:07,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324689207] [2023-11-26 11:51:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324689207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:07,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:07,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:51:07,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014013462] [2023-11-26 11:51:07,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:07,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:51:07,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:07,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:51:07,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:07,572 INFO L87 Difference]: Start difference. First operand 8610 states and 14951 transitions. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (208), 2 states have call predecessors, (208), 4 states have return successors, (209), 2 states have call predecessors, (209), 2 states have call successors, (209) [2023-11-26 11:51:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:08,527 INFO L93 Difference]: Finished difference Result 15826 states and 27225 transitions. [2023-11-26 11:51:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:51:08,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (208), 2 states have call predecessors, (208), 4 states have return successors, (209), 2 states have call predecessors, (209), 2 states have call successors, (209) Word has length 729 [2023-11-26 11:51:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:08,552 INFO L225 Difference]: With dead ends: 15826 [2023-11-26 11:51:08,552 INFO L226 Difference]: Without dead ends: 7256 [2023-11-26 11:51:08,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1450 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:08,562 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 326 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:08,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1180 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:51:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7256 states. [2023-11-26 11:51:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7256 to 7202. [2023-11-26 11:51:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7202 states, 6739 states have (on average 1.6932779344116338) internal successors, (11411), 6748 states have internal predecessors, (11411), 431 states have call successors, (431), 31 states have call predecessors, (431), 31 states have return successors, (431), 422 states have call predecessors, (431), 431 states have call successors, (431) [2023-11-26 11:51:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7202 states to 7202 states and 12273 transitions. [2023-11-26 11:51:08,891 INFO L78 Accepts]: Start accepts. Automaton has 7202 states and 12273 transitions. Word has length 729 [2023-11-26 11:51:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:08,892 INFO L495 AbstractCegarLoop]: Abstraction has 7202 states and 12273 transitions. [2023-11-26 11:51:08,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (208), 2 states have call predecessors, (208), 4 states have return successors, (209), 2 states have call predecessors, (209), 2 states have call successors, (209) [2023-11-26 11:51:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 7202 states and 12273 transitions. [2023-11-26 11:51:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-26 11:51:08,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:08,908 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:08,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:09,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:51:09,118 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:09,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:09,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1565907277, now seen corresponding path program 1 times [2023-11-26 11:51:09,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:09,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552814683] [2023-11-26 11:51:09,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:09,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:09,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:09,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151085621] [2023-11-26 11:51:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:09,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:09,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:09,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:51:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:09,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:51:09,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 6189 proven. 45 refuted. 0 times theorem prover too weak. 19530 trivial. 0 not checked. [2023-11-26 11:51:10,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 294 proven. 45 refuted. 0 times theorem prover too weak. 25425 trivial. 0 not checked. [2023-11-26 11:51:10,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552814683] [2023-11-26 11:51:10,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151085621] [2023-11-26 11:51:10,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151085621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:10,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:10,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-26 11:51:10,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752005887] [2023-11-26 11:51:10,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:10,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:51:10,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:51:11,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:51:11,001 INFO L87 Difference]: Start difference. First operand 7202 states and 12273 transitions. Second operand has 12 states, 12 states have (on average 18.5) internal successors, (222), 12 states have internal predecessors, (222), 3 states have call successors, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 3 states have call predecessors, (130), 3 states have call successors, (130) [2023-11-26 11:51:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:14,784 INFO L93 Difference]: Finished difference Result 20777 states and 35184 transitions. [2023-11-26 11:51:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:51:14,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.5) internal successors, (222), 12 states have internal predecessors, (222), 3 states have call successors, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 3 states have call predecessors, (130), 3 states have call successors, (130) Word has length 730 [2023-11-26 11:51:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:14,816 INFO L225 Difference]: With dead ends: 20777 [2023-11-26 11:51:14,816 INFO L226 Difference]: Without dead ends: 13619 [2023-11-26 11:51:14,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1470 GetRequests, 1448 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:51:14,828 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 1293 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2958 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:14,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2958 Invalid, 2976 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [835 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-26 11:51:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13619 states. [2023-11-26 11:51:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13619 to 13112. [2023-11-26 11:51:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13112 states, 12323 states have (on average 1.6827882820741702) internal successors, (20737), 12338 states have internal predecessors, (20737), 735 states have call successors, (735), 53 states have call predecessors, (735), 53 states have return successors, (735), 720 states have call predecessors, (735), 735 states have call successors, (735) [2023-11-26 11:51:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13112 states to 13112 states and 22207 transitions. [2023-11-26 11:51:15,532 INFO L78 Accepts]: Start accepts. Automaton has 13112 states and 22207 transitions. Word has length 730 [2023-11-26 11:51:15,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:15,537 INFO L495 AbstractCegarLoop]: Abstraction has 13112 states and 22207 transitions. [2023-11-26 11:51:15,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.5) internal successors, (222), 12 states have internal predecessors, (222), 3 states have call successors, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 3 states have call predecessors, (130), 3 states have call successors, (130) [2023-11-26 11:51:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 13112 states and 22207 transitions. [2023-11-26 11:51:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-26 11:51:15,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:15,559 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:15,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:15,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:51:15,771 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:15,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash -899200283, now seen corresponding path program 1 times [2023-11-26 11:51:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:15,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42318152] [2023-11-26 11:51:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:15,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:15,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:15,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5385440] [2023-11-26 11:51:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:15,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:15,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:15,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:15,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:51:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:16,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:51:16,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25764 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25764 trivial. 0 not checked. [2023-11-26 11:51:16,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:16,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:16,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42318152] [2023-11-26 11:51:16,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:16,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5385440] [2023-11-26 11:51:16,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5385440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:16,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:16,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133321688] [2023-11-26 11:51:16,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:16,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:16,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:16,543 INFO L87 Difference]: Start difference. First operand 13112 states and 22207 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:51:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:16,990 INFO L93 Difference]: Finished difference Result 26222 states and 44440 transitions. [2023-11-26 11:51:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) Word has length 730 [2023-11-26 11:51:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:17,022 INFO L225 Difference]: With dead ends: 26222 [2023-11-26 11:51:17,022 INFO L226 Difference]: Without dead ends: 13160 [2023-11-26 11:51:17,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:17,040 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 1 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:17,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1167 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:51:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13160 states. [2023-11-26 11:51:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13160 to 13144. [2023-11-26 11:51:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13144 states, 12355 states have (on average 1.6810198300283286) internal successors, (20769), 12370 states have internal predecessors, (20769), 735 states have call successors, (735), 53 states have call predecessors, (735), 53 states have return successors, (735), 720 states have call predecessors, (735), 735 states have call successors, (735) [2023-11-26 11:51:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13144 states to 13144 states and 22239 transitions. [2023-11-26 11:51:18,008 INFO L78 Accepts]: Start accepts. Automaton has 13144 states and 22239 transitions. Word has length 730 [2023-11-26 11:51:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:18,010 INFO L495 AbstractCegarLoop]: Abstraction has 13144 states and 22239 transitions. [2023-11-26 11:51:18,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 1 states have call predecessors, (114), 1 states have call successors, (114) [2023-11-26 11:51:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 13144 states and 22239 transitions. [2023-11-26 11:51:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2023-11-26 11:51:18,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:18,039 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:18,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:18,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:51:18,249 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:18,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1522976660, now seen corresponding path program 1 times [2023-11-26 11:51:18,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:18,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732346224] [2023-11-26 11:51:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:18,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:18,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:18,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607751730] [2023-11-26 11:51:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:18,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:18,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:18,346 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:18,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_973b6588-4b21-4307-9b63-25c7262fe0eb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process